How to compress a JPEG to 20KB
- 1
Drop your image into the box above, click to browse, or paste it with Ctrl+V. iPhone HEIC photos work too.
- 2
The target is already set to 20KB. Change the number if your form asks for a slightly different limit.
- 3
Check the new size under the image, hold "Compare" to see the original, then download.
When do you need a 20KB JPEG?
Many websites and online forms reject uploads above 20KB. This is common for signatures and thumbnails on exam and government forms. Signature scans, thumb impressions and small ID photos are often limited to 10–20 KB.
Our tool searches for the highest JPEG quality that still fits under 20KB, so you keep as much detail as possible. If the image is very large, it is also scaled down a little until it fits, and the new dimensions are shown under the image.
Frequently asked questions
Will a 20KB photo still look good?
For signatures, small ID photos and thumbnails, yes. A large photo is scaled down to fit, which keeps it sharp at the size it will be shown.
Will the file be exactly 20KB?
It will be at or just under 20KB, never over. Upload portals only check the maximum, so a file slightly below the limit is accepted.
Are my photos uploaded to a server?
No. Compression runs entirely in your browser using WebAssembly. Your images never leave your device.
Can I compress PNG or WebP to this size?
Yes. PNG and WebP images are converted to JPG while compressing. Transparent areas become white.