YouTube Channel Watermark Size: 150x150 Logo and Subscribe Overlay Guide
YouTube video watermarks should use a square image at least 150 x 150 pixels and stay under 1 MB. Use this guide to prepare a simple logo or subscribe-style overlay before adding it in YouTube Studio.
Last checked: August 9, 2026. Based on YouTube Help. ImageSizeKit is not affiliated with YouTube or Google.
Minimum size
150 x 150 px
Shape
1:1 square
File size
Under 1 MB
Best artwork
Simple square mark
AI answer card
Quick answer
- Best size
- Use a square YouTube channel watermark image at least 150 x 150 pixels and under 1 MB
- Best ratio
- Use a simple 1:1 square mark; transparent PNG is often the cleanest export for logo-style watermarks
- Use when
- Use this page when the image will appear as a small video watermark or subscribe-style overlay, not as the channel profile picture or banner.
- Avoid
- Avoid detailed text, full profile icons, or heavy PNG exports that become unreadable or fail the 1 MB limit.
- Check with
- Image Size Checker
- Last checked
- August 9, 2026
- Source boundary
- YouTube watermark display depends on video placement and viewer context. Check the final file locally and preview the mark over real video frames before publishing.
What size is a YouTube channel watermark?
Use a square watermark image at least 150 x 150 pixels and under 1 MB. A transparent PNG is often a practical export choice when the watermark is a logo or simple subscribe mark, but the official size rule is the square 150 x 150 minimum and 1 MB file limit.
The watermark appears over videos, so the design must survive at a small display size. Keep the mark simple, avoid long words, and preview it against light and dark video frames before publishing.
Canonical YouTube watermark checker result action map
Use this map after checking a watermark file. Each result routes the next action to the smallest useful page: design review for a valid file, local file checks for unreadable overlays, profile-picture separation, PNG workflow repair, or the full YouTube image system.
Watermark file is square and under 1 MB
Keep the simple overlay export and record final file proof before adding it in YouTube Studio.
Review design checksMark is unreadable as a tiny overlay
Simplify the logo or subscribe mark, then check the exported file against light and dark video frames.
Check source fileProfile icon was reused as watermark
Separate the watermark from the channel avatar because circular-crop identity and overlay visibility are different jobs.
Compare profile pictureTransparent PNG flattened
Re-export a transparent PNG and verify the format before uploading a logo-style watermark.
Fix PNG workflowChannel brand set needs review
Review the watermark with profile picture, banner, thumbnail, and the full YouTube image set.
Open YouTube hubWatermark publishing priority matrix
Use this priority order before uploading a YouTube channel watermark. The file must pass the square size and 1 MB checks, but the harder job is making a tiny overlay stay visible without turning into a noisy subscribe badge or a mismatched profile icon.
| Priority | Job | Publishing risk | First fix | Next check |
|---|---|---|---|---|
| P0 | Confirm the asset is a video overlay | A square channel icon can satisfy the file shape but fail as a tiny on-video watermark. | Decide whether the image is a watermark, profile picture, or broader channel identity asset before exporting. | Open YouTube hub |
| P0 | Keep the mark simple at small size | Detailed logos, long subscribe text, and thin lines can disappear over real video frames. | Use a simple square mark and preview it over both light and dark footage. | Check source file first |
| P1 | Separate watermark from profile picture | Profile pictures need circular crop safety, while watermarks need overlay visibility and minimal detail. | Create a dedicated watermark export from the same brand mark instead of reusing the full channel icon. | Compare profile picture |
| P1 | Preserve transparent PNG output | A flattened background can make the watermark look like a visible square tile on video. | Export a transparent PNG when using logo-style artwork and verify the final file type. | Choose PNG workflow |
| P2 | Stay under the 1 MB limit | Large transparent PNG exports can exceed the practical watermark file-size limit. | Simplify the design and compress once from the source, then recheck the final file. | Check file-size guidance |
| P2 | Match the full channel brand system | A watermark can feel disconnected from the profile picture, banner, and video thumbnail style. | Use the watermark as one part of the channel identity set, not a separate graphic. | Review channel banner |
Watermark failure diagnosis card
Use this card when a watermark file meets the basic square size rule but still fails because the mark is too detailed, reuses the wrong channel asset, loses transparency, or exceeds the file-size limit.
| Symptom | Likely cause | Fix before upload | Next route |
|---|---|---|---|
| The watermark looks tiny or unreadable on video | The source file may meet 150 x 150, but the artwork contains small words, thin lines, or too much detail. | Use a simple mark, remove long text, and preview it over light and dark video frames before upload. | Check source file first |
| A profile picture is reused as the video watermark | Both assets are square, but profile pictures need circular crop safety while watermarks need small overlay visibility. | Create a dedicated watermark export from the same brand mark instead of reusing the full profile icon blindly. | Compare profile picture |
| Transparent PNG exports with a visible square background | The design or export tool may have flattened transparency, added a background layer, or exported the wrong file type. | Re-export a transparent PNG and check the exact final file before adding it in YouTube Studio. | Choose PNG workflow |
| The watermark file is rejected or too heavy | A high-resolution PNG or detailed subscribe graphic can exceed the practical 1 MB watermark limit. | Simplify the artwork, compress once, then check dimensions and file size again. | Check file size |
Watermark workflow bridge
Watermark queries overlap with profile icons, transparent PNG exports, file-size checks, and full channel branding work. Use this bridge to route each square YouTube asset correctly.
| Starting point | Use when | Route |
|---|---|---|
| Video watermark overlay | Use this page when the asset appears over YouTube videos as a small channel branding or subscribe-style mark. | Stay on watermark guide |
| Square channel identity image | Use the Profile Picture guide when the square image is a channel avatar, icon, or circular-crop identity asset. | Compare profile picture |
| Existing exported file | Use the Image Size Checker when you need proof of width, height, ratio, format, and file size before upload. | Check file |
| Full channel branding refresh | Use the YouTube Banner Size guide when the watermark is part of a broader channel-art update. | Open banner guide |
| Unknown YouTube image | Use the YouTube Image Sizes hub when the asset could be a thumbnail, Shorts frame, banner, profile picture, watermark, podcast cover, or Community post. | Open YouTube hub |
Watermark upload acceptance record
Use this record before adding the watermark in YouTube Studio. A usable watermark needs file proof, small-overlay readability, a dedicated export separate from the profile picture, transparent PNG checks, file-size acceptance, and a handoff back to the full channel image system.
| Acceptance package | Evidence to keep | Reject when | Next route |
|---|---|---|---|
| Final watermark file identity | The actual file added to YouTube Studio has been checked for square dimensions, format, and file size. | The file is a design preview, screenshot, chat export, profile icon draft, or unverified compressed copy. | Check final watermark |
| Small-overlay readability | The logo or subscribe mark stays recognizable over light and dark video frames at a tiny player overlay size. | Thin lines, long words, detailed badges, or low contrast disappear when the mark is scaled down. | Review design checks |
| Profile-picture separation | The watermark is a dedicated overlay export, not a blind reuse of a circular-crop channel profile picture. | The profile image contains details that only work as an avatar and fail as an on-video watermark. | Compare profile picture |
| Transparent PNG acceptance | Logo-style artwork keeps transparency when exported and does not show a visible square tile over video. | The export tool flattened the background, changed the format, or left a white or black box around the mark. | Check PNG workflow |
| 1 MB upload limit acceptance | The file stays under 1 MB after one clean compression pass from the source artwork. | The file is oversized, repeatedly recompressed, or upscaled from a soft source. | Check file size |
| Channel brand system handoff | The watermark matches the same brand mark family as the profile picture, banner, and thumbnail style. | The watermark looks disconnected from the rest of the channel identity or uses a separate campaign graphic. | Review YouTube image set |
YouTube watermark size table
| Requirement | Meaning | How to use it |
|---|---|---|
| 150 x 150 | Minimum recommended source | Use this as the floor for a video watermark image. |
| 800 x 800 | Sharper square source | Useful when the logo has fine edges, but keep the design simple. |
| Under 1 MB | File-size limit | Compress the file without blurring the mark or text. |
| Simple square artwork | Design rule | Use a clear mark that remains visible over video. |
Watermark design checks
- Use a square canvas before export.
- Keep the file under 1 MB.
- Prefer a simple logo or subscribe mark.
- Avoid thin text and detailed backgrounds.
- Preview on light and dark video frames.
- Use the same brand mark family as your profile picture.
YouTube watermark FAQ
What size should a YouTube channel watermark be?
Use a square image at least 150 x 150 pixels and keep the file under 1 MB.
Should a YouTube watermark be a logo or subscribe button?
Use a simple brand mark, channel icon, or subscribe-style graphic. Avoid small text because the watermark appears small over the video player.
Can I use a transparent PNG for a YouTube watermark?
Yes. A transparent PNG is often the cleanest choice for a logo watermark because it can sit over video without a visible square background.
Is a YouTube watermark the same as a profile picture?
No. Both are square channel assets, but a profile picture identifies the channel across YouTube surfaces while the watermark appears on videos as a branding overlay.
Related YouTube image pages
Image Size Checker
Read width, height, ratio, format, and file size locally.
YouTube Profile Picture Size
Compare square channel identity assets and circular crop safety.
YouTube Thumbnail JPG vs PNG
Choose a transparent PNG workflow for simple logo overlays.
YouTube Thumbnail File Size
Use file-size repair guidance when a watermark export is too heavy.
YouTube Banner Size
Refresh the rest of your channel branding assets.
YouTube Image Sizes
Open the full YouTube image asset hub.