Compress Image to 20 KB
Shrink a photo to 20 KB or less, automatically.
🔒 Everything above runs on your device — your file is never uploaded anywhere.
Compress Image to 20 KB shrinks a JPG or PNG to 20 kilobytes or less, the size many forms require for signatures. It runs in your browser and nothing is uploaded.
20 KB is a very small limit, used by some application forms for signature and thumbprint images. Signatures are ideal: a dark pen stroke on a plain white background compresses extremely well. Crop tight around the signature first. A full-colour photograph may need to be scaled down noticeably to fit.
The tool searches for the highest JPG quality that fits under the limit, and only reduces the dimensions if quality alone is not enough. The result is always a JPG, and the whole process runs in your browser, so the photo is not uploaded.
How it works
- 1Upload your JPG or PNG image.
- 2Click Compress. The tool finds the best quality under 20 KB.
- 3Download the JPG.
Frequently asked questions
How do I reduce an image to 20 KB?+
Upload it here. The tool automatically picks the highest quality that keeps the file at or under 20 KB, and shrinks the dimensions only if it has to.
What is the best way to get a signature under 20 KB?+
Sign in dark ink on plain white paper, photograph it in good light, crop it close, then use this tool. Plain backgrounds compress far better than shadows and texture.
Is my photo uploaded?+
No. The image is processed in your browser and never sent to a server.
Will the picture look worse?+
Some quality is lost, as with any compression. The smaller the target, the more visible it is. For very small limits, a photo with a plain background compresses best.