How it works
- Add your JPG, PNG or WebP image.
- Leave the target at 20 KB, or change it.
- Check the before and after preview, press the button and download the smaller image.
Compress an image to 20 KB
Get an image under 20 KB for signature fields and other small uploads. The tool finds the best quality that fits, and your image never leaves your device.
Files stay on your device. Free, with no sign-up.
Image to 20 KB tool
- 1Add images
- 2Adjust
- 3Download
Preparing preview…
Files
Done
Nothing left your device.
What fits in 20 KB?
A signature on white paper, a stamp or a small thumbnail compresses very well, because most of the picture is plain colour. Those usually reach 20 KB with little visible loss.
A full photograph is different. 20 KB is a very tight budget for it, so expect a softer image. If a form asks for a photo this small, crop it close to the face first and keep "Allow resizing" on.
Frequently asked questions
Is 20 KB too small for a photo?
It is small, but workable for a passport-style photo at low pixel dimensions. For a clearer result, check whether the form allows a larger limit, or shrink the pixel size with Resize Image first.
Are my files uploaded anywhere?
No. Everything happens inside your browser, on your own device. Your files are never sent to a server, and you can confirm that in your browser's network tab. Close the tab and they're gone.
How does it reach the size I asked for?
It tries different quality levels and keeps the best-looking one that fits under your limit. If quality alone is not enough and "Allow resizing" is on, it also shrinks the picture in small steps until it fits.
Why is my result a little under the target?
We aim just below your limit on purpose. We also count 1 KB as 1,000 bytes, so the file passes upload forms that count either 1,000 or 1,024 bytes per KB.
Which formats can I save as?
JPG (works everywhere) or WebP (smaller at the same quality, but a few older apps cannot open it). PNG is lossless, so it cannot be squeezed to a size by lowering quality. Pick JPG or WebP for size limits.
Will the image look blurry?
A very small target forces heavy compression, so photos may look softer. Simple images such as signatures compress well. If the result is too rough, raise the limit a little or use Resize Image first.
Can I process several images at once?
Yes. Add as many as you like (up to 50). Each one is processed on its own, and you download them together as a ZIP.
Is there a file size limit?
Each file can be up to 100 MB, and up to 300 MB in total. Because the work happens on your device, very large files depend on your available memory. A desktop browser handles them best.