Guide · Specs
YouTube thumbnail size and specs
The short answer: 1280×720 pixels, 16:9, under 2 MB. Below are the full requirements, the areas YouTube covers, and how to make sure your thumbnail still works at the small sizes people actually see.
≈168 px wide — a typical sidebar size
≈120 px wide — a very small preview
The specs at a glance
| Parameter | Requirement or recommendation |
|---|---|
| Recommended size | 1280 × 720 pixels |
| Aspect ratio | 16:9 |
| Minimum width | 640 pixels |
| Maximum file size | 2 MB |
| Formats | JPG, PNG or GIF |
| Color | sRGB recommended (the web standard) |
These values come from the YouTube Help Center and have been stable for years, but YouTube can change limits — if an upload is rejected, check the current requirements in YouTube Studio.
Why 1280×720 and not bigger?
1280×720 is the size YouTube recommends and the largest it typically displays. A bigger image with the same ratio is accepted as long as it stays under the file-size limit, but it doesn’t make the thumbnail look better on a phone — what matters is how it reads when it’s small.
If you design at a higher resolution, export a 1280×720 JPG for upload. It keeps the file small and the result predictable.
Safe areas: what YouTube covers
The bottom-right corner shows the video length on almost every surface. Keep text, faces and key objects out of roughly the last fifth of the width at the bottom.
- Bottom-right: the video length badge.
- Bottom edge: a red progress bar on videos the viewer has partly watched.
- Right side on desktop: on hover, buttons such as “Watch later” can appear over the image.
Design for the size people actually see
On phones, a thumbnail is often just a few centimeters wide, and in the desktop sidebar it is around 170 pixels wide. Test at these sizes:
- Shrink the thumbnail to about 160 px wide and check whether the text is still readable.
- Use no more than three or four words in a heavy font with strong contrast against the background.
- Make the subject big: a face or an object should fill a large part of the frame.
- Check it on both light and dark backgrounds — YouTube’s interface has both.
More in our article on readability on mobile.
JPG, PNG or GIF?
JPG is the safest choice for photos and gradients: at 1280×720 and normal quality it’s usually far below 2 MB. PNG keeps flat colors and text perfectly sharp but files are larger — if a PNG goes over 2 MB, export as JPG. GIF is accepted, but it’s rarely the right choice for a thumbnail.
Thumbora exports PNG, JPG and WebP. WebP is handy for websites; for YouTube, choose JPG or PNG at 1280×720.
Making a correctly sized thumbnail in Thumbora
- Generate — Thumbora always produces 16:9 images.
- Pick the best version and fix details with an AI edit or in the editor.
- Export as JPG at 1280×720.
- In YouTube Studio, open the video’s details and upload the file as its thumbnail.
If you export at a size larger than the generated image, Thumbora upscales it and labels the file as upscaled — it doesn’t add real detail.
Questions
What is the best size for a YouTube thumbnail?
1280×720 pixels at 16:9. It’s YouTube’s recommendation and the largest size it usually displays.
What is the minimum size?
The image has to be at least 640 pixels wide. Smaller images are rejected or look blurry.
Why was my thumbnail rejected?
Usually the file is larger than 2 MB, the format isn’t supported, or the account isn’t verified for custom thumbnails. A thumbnail can also be removed if it violates YouTube’s policies.
Will a higher-resolution thumbnail look sharper?
Not noticeably. YouTube displays thumbnails at up to 1280×720, so extra pixels aren’t visible to viewers. Clarity at small sizes matters much more.
Related guides and tools
- YouTube thumbnail maker
Make YouTube thumbnails online: describe the video, generate 16:9 options with AI, fix details with words or in the editor and export 1280×720. Step-by-step guide and checklist.
- Gaming thumbnails
Create gaming thumbnails with AI: high-energy compositions for let’s plays, guides, challenges and highlights. Ideas by video type, what to avoid and how to respect game IP.
- Thumbnail ideas
Thumbnail ideas for tutorials, reviews, vlogs, challenges, comparisons, lists, stories and news — what to show, what text to use and what to avoid.
- AI thumbnail editor
Edit thumbnails by describing the change: replace backgrounds, recolor text, move elements, adjust lighting. Every edit becomes a new version. Tips for writing instructions.
- Thumbnail from a photo
Turn your own photo into a YouTube thumbnail: how identity profiles work, which photos give the best likeness, consent rules and tips for expression and lighting.
- Thumbnail design guide
Design principles for YouTube thumbnails: one focal point, contrast, color, typography, faces, consistency and testing — practical rules you can apply today.
- AI thumbnail generator
Generate 16:9 thumbnails from an idea, a photo or a reference.
Get a 1280×720 thumbnail in minutes
Generate in 16:9, refine and export a JPG that’s ready for YouTube Studio.