Compress an image to 20 KB online — free, no upload

20 KB is one of the strictest limits online forms use — common for signature uploads and document thumbnails on exam and application portals. FormFit shrinks your JPG, PNG or WebP photo to under 20 KB entirely in your browser: the image is never uploaded to any server, and the tool even works offline.

Compress to 20 KB now →

How to compress a photo to 20 KB

Open the tool and drop in your image (or paste it with Ctrl/Cmd+V).
The ≤20 KB preset is pre-selected — FormFit immediately finds the highest JPEG quality that stays under 20 KB.
Check the green PASS badge, then download the compressed photo.

Tips for getting under 20 KB

20 KB is tiny, so pixel dimensions matter as much as compression quality. A 4000-pixel-wide phone photo can't fit in 20 KB at readable quality, so FormFit automatically scales the image down when needed. If your form also specifies exact dimensions — such as a 140×60 signature — use the signature preset instead, which crops and resizes to the exact pixels before compressing.

Frequently asked questions

Can any image be compressed to 20 KB?

Yes — FormFit reduces both the JPEG quality and, if necessary, the pixel dimensions until the file fits under 20 KB. Very detailed images end up smaller in pixels, but the tool always keeps the best quality the limit allows.

What format is the 20 KB output?

JPEG, which is what application portals expect. PNG and WebP inputs are converted automatically, with transparent areas filled white.

Is my photo uploaded to a server?

No. FormFit compresses the image with your browser's built-in canvas technology, on your own device. Nothing is transmitted — you can disconnect from the internet and it still works.

Need a different size? Try 50 KB or 100 KB, or set a custom target on the main tool.