Small scans and signatures
A 20 KB ceiling leaves little room for fine detail. Crop unnecessary background before compression, and check thin lines and small text afterward. A size match cannot compensate for illegible strokes.
Set the exact byte ceiling
20 decimal KB means 20,000 bytes. With the binary option checked, the same target permits 20,480 bytes. The compressor displays the active limit and output bytes; use the convention your destination specifies.
Compress and check
- Select your original JPG, PNG, WebP or supported HEIC image.
- Choose the accepted output format and confirm the 20 KB target.
- Press Compress. Only a successful result marked at or under the target fits the byte ceiling.
- Download, reopen and inspect the file. Confirm dimensions, format and visual detail as well as bytes.
When fitting the size is not enough
The encoder may reduce dimensions. PNG and WebP can preserve transparency; JPG uses a white background. This tool does not crop faces, validate application rules, recover blurred detail or pad files to a minimum size. A failed attempt can leave an above-limit best effort; check the result badge before using it.
See measured compression examples, byte units and rejected-upload troubleshooting, and the FAQ.