Social Media Image Checker: Check Dimensions Before Upload
Upload an exported image locally to identify its width, height, ratio, file size, format, and the closest platform image-size guide before you publish.
Checks
width, height, ratio
Matches
platform image workflows
Useful for
social, ecommerce, YouTube
Privacy
local browser check
AI answer card
Quick answer
- Best size
- Use the actual exported file dimensions, then match them to the target platform
- Best ratio
- Depends on the publishing surface: 1:1, 9:16, 4:1, 1.91:1, or marketplace-specific
- Use when
- Use this checker when you already have an exported social, marketplace, or website image and need to route it to the right ImageSizeKit guide before upload.
- Avoid
- Avoid guessing from a template name or reusing one file across feed posts, stories, banners, link previews, and product images without checking the exported dimensions.
- Check with
- Social Media Image Checker
- Last checked
- August 9, 2026
- Source boundary
- This checker reads local file metadata in your browser. ImageSizeKit does not upload or store selected images.
Social image checker action path
Use this page as the first decision point when an exported image could become a feed post, story cover, banner, Open Graph card, marketplace photo, YouTube thumbnail, or client campaign asset. Read the file facts first, then route by final publishing surface.
If the checked image is wide, open the Banner Size Checker. If it is a 1200 x 630-style website share card, open the Open Graph Preview Checker before publishing the URL.
Check the final exported file
Run checker
Upload the actual JPG, PNG, WebP, AVIF, or GIF that will be published, then read width, height, ratio, format, file size, and nearest workflow.
Decide single image or batch
Triage asset
Use the single-image triage when one asset is unclear, or the bulk audit matrix when a campaign folder mixes posts, stories, banners, and share cards.
Route by publishing surface
Route surface
Separate square posts, vertical covers, wide banners, Open Graph cards, marketplace images, and thumbnail-like exports before resizing.
Open the exact follow-up checker
Choose guide
Move into banner, Open Graph, platform-size, marketplace, or YouTube guidance only after the file facts identify the right workflow.
Start with the file you already exported
Many social image problems come from exporting the wrong canvas: a story as a square, a banner as a compressed preview, a product image too small for zoom, or a website share image that does not fit Open Graph previews.
This checker gives you the raw facts first. After that, open the matching platform page for crop behavior, safe-zone guidance, and source notes.
Single image evidence-to-route matrix
Use this matrix after the checker reads one exported social image. It turns the file evidence into the next routing decision: square post, vertical cover, wide banner, Open Graph share card, marketplace image, thumbnail-like export, or a screenshot that should be replaced.
| File evidence | What it answers | Decision before resizing | Next route |
|---|---|---|---|
| Square or near-square final export | The file may fit an Instagram feed post, Facebook profile image, marketplace product image, or creator profile visual. | Confirm whether the final surface crops to a square, circle, product card, or feed preview before upload. | Choose square workflow |
| 9:16 vertical export | The file may be an Instagram Story, Reel cover, YouTube Shorts frame, vertical video cover, or story campaign asset. | Check vertical cover placement before reusing it as a square post, thumbnail, or website share card. | Check vertical cover |
| Wide header-like export | The file may be a LinkedIn banner, Facebook cover, YouTube channel banner, profile header, or site banner. | Run a banner workflow because wide images often fail mobile crop and profile-overlay checks. | Check banner crop |
| About 1200 x 630 or 1.91:1 | The file may be an Open Graph image, website thumbnail, social share card, or campaign link preview. | Separate the local file check from deployed og:image metadata, crawler access, and preview cache checks. | Check OG preview |
| Marketplace or product-style image | The file may be an Etsy listing photo, Shopify product image, Whatnot seller cover, show thumbnail, or livestream product card. | Route marketplace assets separately because buyer trust depends on product detail and card crop clarity. | Check marketplace |
| 16:9 thumbnail-like export | The file may be a YouTube thumbnail, social video thumbnail, website video card, or marketplace show thumbnail. | Decide whether it is a YouTube thumbnail, Open Graph preview, or marketplace thumbnail before compressing it. | Check thumbnail route |
| Screenshot, preview download, or no clear match | The file may describe a proxy image rather than the source asset that should be uploaded. | Find the original export, or calculate a clean replacement size after choosing the final publishing surface. | Calculate replacement |
Social image publish readiness standard
A social image is ready to publish only when the checked file is the final export, the result maps to a clear platform workflow, crop-sensitive content is safe, and upload or preview rules have been verified for the final surface.
| Readiness gate | Pass condition | If it fails | Next route |
|---|---|---|---|
| Final file check | The selected file is the exact JPG, PNG, WebP, AVIF, or GIF that will be uploaded or handed to a scheduler. | Replace screenshots, compressed previews, and copied thumbnails with the original export before checking again. | Check final file |
| Platform match | The result points to one clear platform workflow such as feed post, Story, banner, Open Graph, product image, or marketplace listing. | Route by image shape and publishing surface instead of forcing one social size across every platform. | Route by shape |
| Crop and safe-zone review | Faces, text, logos, product details, and calls to action are inside the crop-safe area for the final placement. | Open the matching platform guide before uploading because dimensions alone cannot prove crop safety. | Review platform guide |
| Upload and preview validation | The file size, format, metadata, and preview cache behavior match the publishing workflow. | Use the pre-upload checklist or Open Graph preview checker when the file is for a campaign, scheduler, or link preview. | Run checklist |
Social image checker search intent map
Use this page as the broad social image checker. The checker reads the file locally first; the table then points you to the platform guide that matches the publishing surface.
| Search query | What this page answers | Next action |
|---|---|---|
| social media image checker | Use the local checker on this page to read the exported file, then route it to the right social image guide. | Check image dimensions |
| check social media image size | Use this checker when you need the real width, height, ratio, format, and file size of a social image before publishing. | Run local checker |
| social media image dimensions checker | Read the exported image dimensions first, then choose the closest Instagram, Facebook, LinkedIn, Open Graph, Etsy, or Shopify guide. | Open social size hub |
| image size checker for social media | Start here when you have one image file and need to know whether it fits a feed post, story, banner, link preview, or product image workflow. | Social media image sizes |
| instagram image checker | Use the checker result to decide whether the image is closer to an Instagram post, Story, or Reel cover workflow. | Instagram post guide |
| facebook image checker | Use the checker for raw file dimensions, then open the Facebook cover guide when the image is a wide profile or Page asset. | Facebook cover guide |
| linkedin image checker | Use this page to read the file, then open the LinkedIn banner guide for profile and Page cover crop notes. | LinkedIn banner guide |
| whatnot image checker | Use this page to read the file, then open the Whatnot guide when the image is for a seller profile, cover, show thumbnail, or listing photo. | Whatnot image guide |
| website share image checker | If the file is meant for a website card preview, use the Open Graph checker after this broad social image check. | Open Graph checker |
| linktree image size | Check the local file first, then decide whether the image behaves like a profile picture, bio link preview, square post, or social card. | Route mixed social image |
| poster size checker | Use the checker for poster or promo graphics, then route the file to feed, story, banner, thumbnail, or marketplace guidance. | Check poster workflow |
| thumbnail image size | Use this when a thumbnail could be a social video cover, Open Graph preview, YouTube thumbnail, or marketplace show image. | Route thumbnail image |
Broad social image query routing
Broad and mixed queries such as image size checker, website image size checker, linktree image size, poster size checker, and whatnot thumbnail size need one practical path: read the file locally, then open the most specific follow-up guide.
| Broad query | How ImageSizeKit should route it | Next route |
|---|---|---|
| image size checker | Start with the generic local file facts, then use this page when the image is for a social, creator, marketplace, or website workflow. | Open image checker upload area |
| website image size checker | Use this page when the checked website image may also become a social card, Open Graph preview, campaign graphic, or reusable post image. | Check website preview |
| linktree image size | Treat this as a mixed creator-profile query: check the exported file, then decide whether it is a profile image, square post, bio card, or social preview. | Route creator image |
| poster size checker | Check the poster file first, then choose whether it is a feed post, Story, banner, marketplace image, or website campaign card. | Route poster image |
| whatnot thumbnail size | Use the Whatnot guide when the file is for a seller profile, show thumbnail, livestream cover, or product listing image. | Open Whatnot guide |
Checker vs size guide vs design tool
Search results often mix social image size lists, design templates, and file checkers. This page is the checker step: it verifies the exported file before you decide whether to follow a platform guide or re-export the creative.
| Step | Use when | Output |
|---|---|---|
| Use this checker | You already exported a JPG, PNG, WebP, or AVIF and need the real width, height, ratio, format, and file size. | Local file evidence before upload. |
| Use a size guide | You know the target platform and need official size, crop, safe-zone, or upload-limit notes. | Platform-specific publishing guidance. |
| Use a design tool | The exported file is wrong and you need to resize, crop, or re-export a different version. | A corrected file to check again. |
Publishing workflow built for one file or a batch
A social media image checker is most useful when it fits the real handoff: one creator may paste a single image from a design tool, while a marketer may need to audit a batch of campaign graphics before scheduling.
Single image check
Choose, drop, or paste one exported image and read the exact width, height, ratio, file size, and format.
Bulk social image audit
Select multiple files, compare the closest platform match, then export a CSV for the publishing checklist.
Copy results for handoff
Copy a clean result summary when a designer, client, or teammate needs the exact mismatch and next page.
No upload, no account
Images are checked locally in the browser, so drafts and client assets do not leave the device.
Single social image triage priority matrix
When you only have one exported image, fix the route before polishing the file. Decide the publishing surface first, then check banner crops, Open Graph previews, vertical covers, marketplace images, or thumbnail-like files in the right workflow.
| Priority | Checker signal | Fix first | Why it matters | Next route |
|---|---|---|---|---|
| P0 | The final publishing surface is unclear | Choose the destination before resizing | The same file can behave differently as a feed post, Story, banner, Open Graph card, marketplace image, or thumbnail. | Open social hub |
| P0 | The image is wide or header-like | Check banner crop behavior | Wide images have high mobile and profile overlay risk, so width alone cannot prove upload readiness. | Check banner |
| P1 | The image is near 1200 x 630 or 1.91:1 | Route it as a website share card | Open Graph cards need local file checks plus metadata, crawler access, and preview freshness checks. | Check OG preview |
| P1 | The image is vertical or cover-frame-like | Check vertical cover placement | Stories, Reels, Shorts, and vertical covers can crop text differently from feed posts and thumbnails. | Check vertical cover |
| P2 | The image is product, seller, or marketplace-like | Route marketplace assets separately | Product photos, seller covers, listing images, and livestream thumbnails use different crop priorities from social posts. | Check marketplace |
| P2 | The image looks like a 16:9 thumbnail | Decide thumbnail versus social preview | A 16:9 file may be a YouTube thumbnail, social video cover, marketplace show thumbnail, or website video card. | Check thumbnail |
Bulk social image audit priority matrix
When a campaign folder contains many exported images, fix routing problems before polishing individual files. Separate surfaces first, then handle banner crop risk, Open Graph previews, vertical covers, marketplace images, and remaining soft exports.
| Batch result | Fix first | Why it matters | Next route |
|---|---|---|---|
| Multiple files match different surfaces | Split the batch by publishing surface | A batch that mixes feed posts, Stories, banners, Open Graph cards, and product photos cannot be approved with one social size rule. | Open social size hub |
| Wide images appear in the batch | Route wide files to banner checks | Wide headers have the highest crop risk on mobile and profile surfaces, even when the raw dimensions look large. | Check banner files |
| 1.91:1 files are campaign previews | Separate Open Graph cards from social posts | A website share image needs og:image metadata, public crawler access, and cache refresh checks after the file dimensions pass. | Check OG previews |
| Vertical covers are reused as feed posts | Decide Story, Reel, Shorts, or feed placement | Vertical cover artwork often fails when the same file is pushed into square feed cards or link previews. | Check vertical covers |
| Marketplace images are mixed with social creatives | Route seller, show, listing, and product photos separately | Marketplace product cards and livestream seller assets need different crop and detail priorities from social promo graphics. | Check marketplace files |
| Only minor size softness remains | Re-export from a larger canvas or calculate replacement dimensions | After surface routing is clean, remaining softness is usually an export-size or source-quality issue. | Calculate replacements |
Campaign launch queue matrix
After checking one file or a batch, approve the asset that can block publishing first. Use this queue when social posts, campaign folders, client handoffs, marketplace launches, website previews, and brand headers are moving toward the same deadline.
| Launch moment | File signal | Approve first | Next route |
|---|---|---|---|
| Same-day social post | One final feed, Story, Reel cover, or profile image is already selected. | Run the local file check, confirm the platform route, then open the closest guide before uploading. | Choose platform guide |
| Scheduled campaign batch | A folder contains mixed square, vertical, wide, 1.91:1, thumbnail-like, and product images. | Split the batch by publishing surface before resizing or compressing any individual file. | Audit campaign files |
| Client or teammate handoff | The image will be passed to a scheduler, CMS, creator, or client approval thread. | Copy the checker result so the receiving person sees dimensions, ratio, file size, format, and next route. | Run handoff checklist |
| Product or livestream launch | The asset is a seller profile image, show thumbnail, listing photo, or marketplace product card. | Route marketplace images separately because buyer trust depends on item detail and card crop clarity. | Check marketplace image |
| Website or landing-page promotion | The image is close to 1200 x 630, 1.91:1, or will appear in a shared URL preview. | Check Open Graph image size and preview behavior instead of treating the file like a banner. | Check OG preview |
| Brand header refresh | The file is wide, header-like, cover-like, or reused across LinkedIn, Facebook, YouTube, and site banners. | Check mobile crop and safe-area risk before approving the wide asset for multiple placements. | Check banner crop |
Check image dimensions locally
Choose, drop, or paste one or more images to read width, height, aspect ratio, file size, format, orientation, and closest publishing workflow. The check runs in your browser and does not upload or store your image.
If a guide sent you here, start with the exact exported file, then open the recommended next guide for crop, safe-area, text, metadata, or upload-limit checks.
Drop images here, paste from clipboard, or choose files.
JPG, PNG, GIF, WebP, and AVIF files are read locally in your browser. Use CSV export when checking a batch for a designer, client, or publishing checklist.
Arriving from a thumbnail, banner, Open Graph, LinkedIn, or safe-area guide? Check the final export here first, then follow the recommended next guide.
Only know the width and height?
Enter pixel dimensions to route the image shape without uploading a file. Use the file picker later for format and file-size checks.
This page starts with a square social post image: 1080 x 1080. Press Check size for a one-step diagnosis, then upload the final file when you need format and file-size evidence.
Try a common size without uploading:
Choose the exact exported image
Read width, height, ratio, file size, and format
Open the recommended guide, copy the result, or export CSV
Canonical social checker result action map
Use this map immediately after the checker returns a result. It turns the status of the checked social image into one publishing action, one route, and one proof record before the asset leaves ImageSizeKit.
| Checker result state | Publishing action | Proof to keep | Route |
|---|---|---|---|
| Best match is clear | Open the matched platform guide and verify crop, safe area, upload notes, and text or product readability. | Checked file name, width, height, ratio, format, file size, and the recommended ImageSizeKit route. | Open matched guide |
| Usable but smaller than ideal | Return to the source canvas or calculate a cleaner replacement size before compressing or scheduling the file. | Current dimensions, target route, minimum useful size, and the reason a larger export is needed. | Calculate replacement |
| Shape mismatch | Route by final publishing surface before editing: square feed, vertical cover, wide banner, Open Graph card, marketplace image, or thumbnail. | Rejected surface, chosen surface, and the page that explains the next crop or upload check. | Route by surface |
| Screenshot or proxy file | Find the original export and rerun the checker because screenshots, CMS crops, and chat previews can report the wrong production dimensions. | Proxy-file reason, source-file owner, replacement deadline, and the route to recheck after export. | Check source export |
| Batch contains mixed surfaces | Split the batch before approval so banners, vertical covers, Open Graph cards, product photos, and feed posts each get their own route. | Batch group, surface type, owner, export status, and final pre-upload checklist route. | Split batch routes |
Social checker result handoff package
After the checker reads a single image or campaign batch, turn the result into a short handoff record. A useful note should include file facts, the chosen publishing surface, batch grouping, owner and next route, pre-upload status, and the approval record for the social calendar, CMS, client thread, or product launch checklist.
| Package part | Include in the note | Why it matters | Next route |
|---|---|---|---|
| Checked file facts | File name, width, height, ratio, file size, format, orientation, and whether the asset was checked as a single image or inside a batch. | Keeps designers, schedulers, and clients aligned on the exact exported file that passed or failed the local check. | Run checker |
| Publishing surface decision | One chosen surface: feed post, Story or Reel cover, banner, Open Graph card, marketplace image, thumbnail, or product photo. | Prevents one image from being approved for every platform when the crops and upload rules are different. | Choose surface |
| Batch grouping note | Whether the asset belongs in the square, vertical, wide, 1.91:1, marketplace, thumbnail-like, or unknown group. | Lets a marketer split a campaign folder before resizing, compressing, or handing files to a scheduler. | Group asset |
| Owner and next route | The person responsible for the next step plus the linked ImageSizeKit route that explains the crop, metadata, marketplace, or thumbnail rule. | Turns a checker mismatch into a concrete designer, SEO, ecommerce, creator, or campaign action. | Choose guide |
| Pre-upload status | Ready, needs re-export, needs crop review, needs Open Graph preview, needs marketplace review, or needs original source file. | Gives the launch owner a publish-or-return decision instead of a loose dimension note. | Run checklist |
| Approval record | A copied line with result, route, owner, deadline, and final status for the social calendar, CMS, client thread, or product launch checklist. | Creates a durable record for why the asset was approved, returned, or routed into a different image-size workflow. | Copy result |
Social checker platform upload acceptance record
Use this acceptance record after the handoff package is prepared. It confirms that the checked social image is the final file, belongs to one publishing surface, carries crop-sensitive proof, and can be handed to a scheduler, client, or teammate without losing the next route.
| Acceptance gate | Proof to keep | Accept when | Validate |
|---|---|---|---|
| Final social file identity | File name, width, height, ratio, file size, format, and whether the checked asset is the actual file that will be uploaded or scheduled. | The checker result came from the final export, not a screenshot, compressed social preview, chat thumbnail, CMS crop, or draft artboard. | Check final file |
| Single publishing surface | One chosen surface is attached to the result: feed post, Story, Reel cover, banner, Open Graph card, marketplace image, or thumbnail. | The file is no longer treated as a universal social image and has a route for crop, safe-zone, metadata, marketplace, or upload-rule review. | Choose surface |
| Crop-sensitive proof | Notes for faces, product detail, logos, text, CTA placement, safe zone, or mobile crop behavior on the chosen surface. | Important content has been checked against the platform guide or checker that matches the final surface. | Review crop |
| Scheduler or client handoff | Copied result or CSV row, owner, final route, due time, and publish-or-return decision for the campaign calendar or approval thread. | Another person can upload, schedule, approve, or request re-export without repeating the size diagnosis from scratch. | Run checklist |
| Non-social reuse boundary | A note if the image will also become a website share card, marketplace listing, product photo, YouTube thumbnail, or brand header. | Reuse is routed through the Open Graph, marketplace, YouTube, product-image, or banner workflow before the file leaves the social campaign. | Check reuse |
Social image failure diagnosis card
Use this diagnosis card when the checker reads a valid image but the published result is blurry, cropped, stale, or routed to the wrong platform surface. Start from the visible failure, then choose the next checker or platform guide.
| Visible failure | Likely cause | Fix before publishing | Next route |
|---|---|---|---|
| Image looks sharp locally but blurry after upload | The file may be smaller than the platform target, exported from a compressed preview, or resized by a scheduler. | Re-export from the source canvas, then check the final file before opening the matching platform guide. | Review platform targets |
| Text, face, or product detail is cropped | The dimensions can match while important content sits outside a crop-safe area for feed, story, banner, or profile surfaces. | Route the image by placement first, then move key content toward the platform-safe center before exporting again. | Check crop-prone banners |
| Website link preview shows the wrong or old image | The local file may be correct, but Open Graph metadata, crawler access, or platform preview cache is still stale. | Use the Open Graph preview checker after confirming the file is a 1200 x 630-style share image. | Check OG preview |
| A vertical cover is treated like a square post | Reels, Shorts, Stories, and feed posts use different crops even when the same creative is reused. | Check whether the final placement is a vertical cover, square feed image, or thumbnail before resizing. | Open Reel cover guide |
| Marketplace or livestream image does not fit the card | Seller covers, show thumbnails, listing photos, and product images often have different card targets from social posts. | Route marketplace assets to the Whatnot or product-image guide instead of forcing an Instagram or LinkedIn size. | Open Whatnot guide |
Social checker result to upload acceptance coverage map
Use this checker result to upload acceptance coverage map when the local checker has already identified the file shape. It routes the result into the specific upload acceptance page that can confirm crop proof, metadata behavior, marketplace reuse, product image quality, or thumbnail readiness before the file leaves ImageSizeKit.
| Checker signal | Likely publishing surface | Acceptance record to keep | Validate |
|---|---|---|---|
| Square or near-square social export | Instagram feed, carousel, profile-style crop, or marketplace product card | Keep the checked file facts, choose feed versus product reuse, and confirm the final upload file is not a screenshot or compressed preview. | Instagram post upload acceptance |
| 9:16 vertical export | Instagram Story, Reel cover, Shorts cover frame, or vertical campaign creative | Attach cover-frame placement notes before approving the file for Story, Reel, Shorts, or feed reuse. | Instagram Story upload acceptance |
| Vertical video-cover file | Instagram Reel cover or YouTube Shorts thumbnail-style cover | Confirm center-safe text, profile-grid crop, and whether a separate Shorts or Reel cover export is needed. | Reel cover upload acceptance |
| Wide header-like export | LinkedIn banner, Facebook cover, YouTube banner, or brand header | Validate profile overlay, mobile crop, and surface selection before handing the wide asset to a scheduler or page owner. | LinkedIn banner surface acceptance |
| Wide cover with mobile crop risk | Facebook Page cover or profile cover | Keep desktop and mobile crop proof so the cover does not pass dimensions while hiding the logo, face, or CTA. | Facebook cover upload acceptance |
| About 1200 x 630 or 1.91:1 | Open Graph card, website share image, landing-page preview, or campaign URL preview | Validate the local file plus deployed og:image metadata, crawler access, and preview cache behavior. | Open Graph final preview acceptance |
| Marketplace listing or product-detail image | Etsy listing photo or Shopify product image | Route the asset to the correct commerce surface so buyer-detail visibility is not judged by a generic social crop. | Etsy listing upload acceptance |
| Product image reused from storefront assets | Shopify product image, collection card, marketplace listing, or social promo product crop | Confirm storefront image quality, product detail, and reuse boundary before sending it into social or marketplace workflows. | Shopify product upload acceptance |
| Seller cover, show thumbnail, or livestream product card | Whatnot seller profile, cover, show image, or listing image | Record whether the image is a seller asset, show thumbnail, listing photo, or product card before upload approval. | Whatnot seller upload acceptance |
| 16:9 thumbnail-like export | YouTube thumbnail, video cover, social preview, or marketplace show thumbnail | Decide thumbnail versus Open Graph versus marketplace reuse before approving the same 16:9 file everywhere. | YouTube thumbnail upload readiness |
Social checker launch decision log
Use this log after the handoff package is prepared. The checker result should end with a clear launch decision: publish, return for re-export, send to crop review, validate Open Graph, review marketplace placement, or replace a proxy file with the real source export.
| Launch decision | Use when | Record before handoff | Next route |
|---|---|---|---|
| Ready to publish | The checked file is the final export, the platform route is clear, and crop-sensitive content is safe for the chosen surface. | Approved route, final dimensions, owner, publishing surface, and the guide used for crop or upload notes. | Run final checklist |
| Return for re-export | The file is too small, exported from the wrong artboard, saved as a compressed preview, or missing the original source quality. | Failed dimension, target replacement size, source canvas owner, and the exact route that explains the correct export. | Calculate replacement |
| Route to crop review | The dimensions look plausible but faces, text, product detail, or logos may be cropped by a feed, Story, banner, or profile surface. | Crop-risk area, platform surface, safe-zone guide, and whether a separate feed, vertical, or banner export is required. | Review crop risk |
| Route to Open Graph validation | The file is intended for a page URL, blog card, landing page preview, product URL, or website share card. | Image URL, page URL, metadata owner, preview cache status, and whether the checked file matches the deployed og:image. | Validate OG preview |
| Route to marketplace review | The image is a seller cover, show thumbnail, listing photo, livestream graphic, or product detail image. | Marketplace destination, product detail visibility, seller-card crop, listing owner, and launch deadline. | Review marketplace image |
| Needs source-file replacement | The checked file is a screenshot, chat preview, downloaded thumbnail, or proxy image instead of the asset that will be uploaded. | Proxy file reason, requested source file, owner, due time, and the route to rerun after the real export is available. | Check replacement file |
Social image checker repair route gate
After the local checker reads the file, use this gate to decide the next repair path. It prevents one exported asset from being forced into the wrong social surface, which is the most common cause of blurry previews, cropped banners, and rejected campaign images.
| Checker signal | Repair decision | Next route |
|---|---|---|
| Best match is a feed, profile, or marketplace guide | Keep the file only if the dimensions match the final publishing surface, then open the matching guide for crop, safe-zone, and upload notes. | Choose platform guide |
| File is wide header or banner | Do not treat a wide header as a generic social post. Check it against banner targets such as YouTube, LinkedIn, Facebook, profile headers, and site banners. | Check banner size |
| File is website share card | A 1200 x 630-style image still needs Open Graph metadata, public crawler access, alt text, and cache refresh checks before sharing. | Check Open Graph preview |
| File is YouTube or Shorts thumbnail-like | Route 16:9 exports to YouTube thumbnail guidance and 9:16 vertical exports to Shorts thumbnail guidance before reusing them across other social platforms. | Open YouTube thumbnail guide |
| Status is mismatch or unknown | Use the generic dimension checker and aspect ratio calculator before resizing, because the file may come from the wrong artboard or a compressed preview. | Check exact file facts first |
How to act on the checker result
Treat the checker output as a decision record. The result tells you whether to open a platform guide, re-export a larger file, route by image shape, or replace a screenshot with the true upload asset.
| Checker result | What it means | Next action |
|---|---|---|
| Best match is a platform guide | The file ratio and practical size are close enough to a known social, marketplace, YouTube, or Open Graph workflow. | Open social image size hub: Open the recommended guide to check crop zones, safe areas, text readability, upload notes, and platform-specific exceptions. |
| Status is usable but smaller than ideal | The shape is close, but the exported file may look soft, pixelated, or cropped after platform resizing. | Calculate a better export: Re-export from a larger canvas or use the aspect ratio calculator before checking the corrected file again. |
| Status is mismatch | The file likely belongs to a different publishing surface, or it was exported from the wrong artboard. | Route by image shape: Route by shape first: square feed/product image, vertical story or cover, wide banner, Open Graph preview, or marketplace listing. |
| File is a screenshot or downloaded preview | The dimensions may describe the screenshot or compressed preview, not the source file that should be uploaded. | Check the final file: Find the original export, then run the checker again before publishing. |
Checker result to publishing surface matrix
After the checker reads the file, choose the route by the surface where the image will be published. The same image can behave differently as a feed post, Story cover, banner, Open Graph card, product image, or thumbnail.
| Checker result | Likely publishing surface | Decision before upload | Route |
|---|---|---|---|
| Square or near-square | Instagram feed post, Facebook profile image, marketplace product photo, or creator profile visual. | Check whether the final surface crops into a circle, product card, square feed post, or profile preview before upload. | Choose square workflow |
| 9:16 vertical | Instagram Story, Reel cover, YouTube Shorts frame, vertical video cover, or campaign story asset. | Check vertical cover behavior before reusing the same creative as a square post or website card. | Check vertical cover |
| Wide header | LinkedIn banner, Facebook cover, YouTube channel art, profile header, or brand cover image. | Use a banner workflow because wide files often fail on mobile crops even when the dimensions look valid. | Check banner workflow |
| About 1.91:1 | Open Graph image, social share card, website thumbnail, or campaign link preview. | Use Open Graph sizing and preview checks instead of treating the image like a profile banner. | Check OG image |
| Marketplace-style product image | Etsy listing image, Shopify product image, Whatnot listing photo, or livestream seller image. | Route by marketplace because product photos and seller cards need different crops than social feed posts. | Check marketplace image |
| 16:9 thumbnail-like | YouTube thumbnail, social video thumbnail, website video card, or marketplace show thumbnail. | Decide whether it is a YouTube thumbnail, Open Graph preview, or marketplace thumbnail before compressing it. | Check thumbnail route |
| 16:9 social video thumbnail ready for upload | A checked social video thumbnail, campaign video card, or creator thumbnail that already has the right 16:9 shape. | Run the social pre-upload checklist after routing the thumbnail-like file so ratio, crop, file size, and final destination are checked together. | Run checklist |
| Screenshot or downloaded preview | Usually a proxy file, not the source image that should be uploaded. | Find the original export and run the checker again before handing it to a scheduler, client, or CMS. | Check original export |
| No clear match | A custom crop, old export, compressed preview, or image from the wrong artboard. | Route by final publishing surface, then calculate a clean replacement size if needed. | Calculate replacement |
What this checker cannot prove
A local image check is the first gate, not the whole publishing decision. Use the checker to get file facts, then verify crop safety, upload rules, and preview freshness in the page that matches the final surface.
| Boundary | Why it matters | Next verification |
|---|---|---|
| It cannot prove platform crop safety | A file can be the right size while text, logos, faces, or product details sit too close to crop-prone edges. | Review platform crop rules: Open the matching platform guide and check feed, story, banner, profile, marketplace, or Open Graph crop behavior. |
| It cannot prove upload acceptance | Some platforms also apply file-size, file-type, account, product, or metadata rules after the image passes a local dimension check. | Run pre-upload checklist: Use the recommended ImageSizeKit guide for upload notes, then verify inside the actual publishing workflow. |
| It cannot prove preview cache freshness | Website share cards can keep showing stale Open Graph images even when the new 1200 x 630 file is correct. | Check Open Graph preview: Move to the Open Graph checker and metadata guide when the final destination is a link preview. |
| It cannot fix a compressed preview file | Downloaded social previews, screenshots, and chat thumbnails may be smaller or more compressed than the source image. | Check the original export: Find the original export, then run the local checker again before handing the file to a scheduler or client. |
Platform routing matrix
Use the checker result as the raw file evidence, then choose the page that matches the publishing surface and crop risk.
| Asset type | Dimension signal | Open guide |
|---|---|---|
| Instagram feed image | Square, portrait, or landscape feed creative | Instagram Post Size |
| Instagram Story or Reel cover | Vertical 9:16 image or Reel cover reference | Instagram Story Size |
| Facebook cover photo | Wide cover image with mobile and desktop crop risk | Facebook Cover Photo Size |
| LinkedIn banner | Wide personal profile or Page cover image | LinkedIn Banner Size |
| Website share image | Open Graph card preview image | Open Graph Image Size |
| Marketplace or product photo | Square or high-resolution ecommerce product image | Etsy Listing Image Size |
| Whatnot seller or show image | Seller profile image, 750 x 424 cover image, show thumbnail, or listing photo | Whatnot Image Size |
Social checker routing bridge
A social image can look like a thumbnail, vertical cover, wide banner, marketplace listing, or website share card. Use this bridge after the checker reads the file, then route the result into LinkedIn, Whatnot, Open Graph, Instagram, Facebook, YouTube, or ecommerce guidance.
| Bridge route | Image type | Action |
|---|---|---|
| YouTube Shorts Thumbnail Size | Vertical video or cover frame | Use this route when Shorts, Reels, Stories, and social video cover files need a vertical-image decision before reuse. |
| YouTube Banner Safe Area | Wide banner or header | Use this route when channel art, LinkedIn banners, Facebook covers, or Open Graph-like exports need a wide-image check. |
| LinkedIn Banner Size | Profile or company banner | Use this direct route when the checked file is a LinkedIn profile banner or company Page header. |
| Whatnot Image Size | Marketplace seller image | Use this marketplace route when the checked file is a seller profile, cover, show thumbnail, or listing image. |
| Open Graph Image Size | Website share card | Route website share-card files here after the checker confirms a 1200 x 630-style export. |
Where to go after the check
Check Image Dimensions Before Upload
Use this workflow when you only have a final image file and need the right publishing route.
Instagram image sizes
Choose feed, Story, or Reel cover guidance.
Pre-upload workflow
Use a checklist before publishing social images.
Check Banner Size Before Upload
Use this workflow when a wide social image may crop on mobile or profile surfaces.
Banner Size Checker
Check wide profile, channel, and social header artwork.
Open Graph Preview Checker
Check website preview images before sharing.
Open Graph Image Size
Use this guide when the checked file is a 1200 x 630 website share image that still needs og:image metadata.
Etsy Listing Image Size
Check marketplace photo dimensions and crop safety.
Shopify Product Image Size
Check ecommerce product image dimensions.
Aspect Ratio Calculator
Calculate a replacement canvas before re-export.
Public social checker workflow reference
For a citable workflow map, use the public reference that connects the social media image checker with Instagram, LinkedIn, Open Graph, marketplace, banner, and generic image-size routing.
External workflow
Social media image checker public workflow reference
Opens the self-owned workflow asset for cross-platform social image routing and AI citation context.
Social media image checker FAQ
What does the social media image checker read?
It reads image width, height, aspect ratio, file size, format, orientation, and the closest image-size workflow that ImageSizeKit can recommend.
Can I use it for Instagram, LinkedIn, Facebook, Open Graph, Etsy, Shopify, or Whatnot images?
Yes. Use it as a first-pass local check, then open the matching platform guide for crop, safe-zone, and upload notes.
Does ImageSizeKit upload my image?
No. The checker reads image dimensions locally in your browser and does not upload or store your image.