Image Resizer
Resize images to any dimension
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
YouTube thumb 1280×720 selected — upload an image to apply it.
Drag & drop files here
or browse to upload
Supports PNG, JPG, WebP up to 20MB
Processed in your browser - your file never leaves this device.
About this tool
A YouTube thumbnail is 1280 by 720 pixels, and it decides more clicks than the title does. The catch is that it is designed at 1280 wide but mostly seen far smaller - in search results, the sidebar and on phones - so the image has to work as a tiny, high-contrast poster. This page crops to that 16:9 thumbnail frame for you. Keep text large and clear of the bottom-right corner, where YouTube places the video length.
How to use this tool
- Pick a strong frameStart with a clear face or subject - a still from the video or a dedicated photo.
- Crop and leave the corner clearPosition the subject in the 1280 x 720 frame, keeping the bottom-right free of text for the duration badge.
- Upload as the custom thumbnailDownload a JPG or PNG and add it in YouTube Studio as the video’s custom thumbnail.
Designing for the small size people actually see
- Use three to five words of text at most, in heavy type.
- Keep text and faces away from the bottom-right corner, where YouTube places the video length.
- Use strong contrast - YouTube shows thumbnails on light and dark themes.
- Shrink your design to phone size before uploading to check it still reads.
- Stay under YouTube's file size limit for custom thumbnails (2 MB at the time of writing) - JPG usually helps.
Key features
- The exact size YouTube expects for custom thumbnails.
- A quick way to test two or three thumbnail versions of the same video.
Common uses
- Creators uploading a custom thumbnail.
- A/B testing thumbnail versions.
- Resizing a screenshot from the video into a thumbnail.
Tips for better results
- Preview at phone size.
- Avoid the bottom-right corner.
- Use JPG to stay under the size limit.
Mistakes to avoid
- Long sentences of small text.
- Important detail under the duration badge.
- Low-contrast colours that vanish in dark mode.
Frequently asked questions
1280 x 720 pixels (16:9), with a minimum width of 640 pixels.
Custom thumbnails have a file size cap (2 MB at the time of writing); JPG keeps you under it.
Yes - export a still and resize it here, then add text if you like.
YouTube compresses thumbnails hard, so flat colour and heavy type survive the trip where fine detail and gradients do not.
Drop it onto this page. The YouTube Thumbnail preset is already selected, so it resizes straight to 1280 x 720 pixels and shows the crop before you download.