Universal format, best for photos. No transparency.
Finds the best quality that fits the budget — downscales only if nothing fits.
Compression runs entirely in your browser — your image never leaves your device.
Compress Image to 20KB
Twenty kilobytes is about as tight as upload limits get — signature slots on exam forms, tiny avatars, legacy portals with hard caps. Hand-tuning a slider to hit 20KB is miserable; this tool takes the target directly and does the search for you, keeping full resolution for as long as the budget allows and stepping the size down only when nothing else fits.
At this budget a photograph survives as a recognizable subject with modest detail — fine for the thumbnail-scale slots these limits usually guard. Direct-from-camera photos (4000px and up) will be downscaled substantially, often into the 300–500px range; images that were already small may keep their dimensions untouched.
The result panel reports the delivered dimensions, so you can confirm the output matches what the portal asks for before uploading.
Crop before you compress — 20KB spread across a tight crop reads far better than across a full scene. JPG is selected by default because exam and government portals usually require it; switch to WebP in the sidebar when the destination allows it, since WebP's encoder visibly outperforms JPG at extreme budgets.
At most 20KB — the compressor keeps the highest quality the limit allows and leaves a few bytes of headroom so the upload never bounces.
At 20KB most camera photos cannot keep full resolution at any quality, so the tool reduces the dimensions until the budget fits. A smaller sharp image beats a full-size blocky one.
Because 20KB slots are almost always signature uploads on exam, government or legacy portals that require classic JPG. If the destination accepts WebP, switch it in the sidebar for more detail per kilobyte — the target search reruns automatically.
No. The compression search and the download all run locally in your browser — nothing is transmitted or stored.