A clear first impression at 16:9
Build a 1280 × 720 thumbnail canvas with a wide 16:9 ratio. Resizing sets the shape; readability still depends on strong contrast, one clear subject and a headline that survives a small preview.
Get a better result
Avoid enlarging a tiny screenshot to fill the frame. Use an original photo or high-resolution capture, then check the export at phone size. Leave a little breathing room around the bottom-right corner where a duration overlay may appear.
A quick workflow
- Choose an original image with enough detail for your destination.
- Review the preset. Use Fit to retain the whole image or Fill to crop the edges.
- Pick the file format and quality, process, then compare the result before downloading.
Continue this workflow with Image resizer, Image cropper, Instagram post resizer. Browse the Resize tools to compare other options.
For a deeper explanation, read how to resize without stretching or our JPG, PNG and WebP guide.
Presets are practical starting canvases, not promises of platform acceptance. Supported sizes, crops and upload limits can vary. Review the destination’s current guidance and upload preview.