Compress Image to 20KB

A 20KB cap is the strictest size limit you will run into online, and it shows up in exactly the places that refuse to budge: scanned signature boxes on exam forms, profile thumbnails, and the upload fields on the oldest, fussiest government portals. When a form says the file must be under 20KB, it usually means the field was built years ago for a tiny database column, and there is no slider, no override, and no negotiating with it. Your image is either under 20KB or it is rejected.

The trouble is that almost nothing modern lands near 20KB on its own. A signature snapped on a phone is often 2 to 4MB — a hundred times too big — and even a screenshot or a cropped headshot rarely drops below 200KB without help. People end up retaking the photo at lower resolution, mailing it to themselves to shrink it, or pasting it into a document just to export something smaller. None of that reliably hits a 20KB ceiling.

This tool removes the guesswork. You drop in a signature, an avatar or a thumbnail, and it repeatedly re-encodes the image, stepping the quality down until the file genuinely lands at or under 20KB. Because 20KB is so aggressive, the smartest move is to resize the picture to signature or avatar dimensions first — once the pixel count is small, hitting 20KB becomes easy and the result stays far more legible.