Get your file accepted, first try
Exact pixel size, an exact KB range — including the minimum, which is what actually gets uploads rejected and which almost every other tool ignores. 117 free tools to merge, compress, and convert PDFs, photos, and documents, all running in your browser.
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Compress an image to 20KB
Drop a photo in and it comes out at or under 20 KB — in your browser, so it is never uploaded anywhere.
What 20 KB is usually for
20 KB is the tightest limit in common use — signature images on application forms, and the smaller photo slots on government portals.
What you'll actually get at this size
Be realistic: 20 KB is aggressive. On a full-size photo you WILL see compression artefacts — softness around edges, blockiness in smooth areas like a plain background. The way to survive it is to shrink the pixel dimensions first: at 200×230 a 20 KB JPEG still looks fine, while a 2000-pixel-wide photo squeezed to 20 KB looks like it was faxed. If the form gives you a pixel size, use it.
If your form gives a range, use both numbers. Portals often say "between 20 KB and 50 KB". Most compressors honour only the ceiling, hand you a file far under the floor, and the form rejects it for being too small. And if you also resize to the exact pixel size the form wants, the photo often lands under the minimum naturally — at which point compressing harder cannot help, because shrinking is the wrong direction. The tool below takes both ends of the range, and will raise the file back up to clear the floor.
Frequently asked questions
Why does my photo look terrible at 20 KB?
Almost always because the pixel dimensions are too big for the byte budget. At 200 × 230 pixels a 20 KB JPEG still looks fine; a 2000-pixel-wide photo squeezed into the same 20 KB looks faxed. Resize to the form's stated pixel size first and the quality problem usually disappears.
The form wants a minimum of 10 KB and my file comes out at 6 KB. What now?
You cannot fix that by compressing — compression only shrinks, and a JPEG cannot be padded upward by re-saving it. The tool here takes both ends of the range and will raise a too-small file back up to clear the floor, which is the half of the job most compressors simply don't do.
What actually requires 20 KB?
It is the tightest limit in common use: signature images on application forms, and the smaller photo slots on government exam portals. If a form asks for 20 KB, it will almost always also state exact pixel dimensions — use them.