Compress Image to 20KB

20KB is one of the tightest limits you'll run into — it shows up mostly on signature-scan uploads and a handful of strict government exam forms that were built around dial-up-era file sizes and never updated. Getting a modern phone photo down to 20KB usually means noticeable compression, so this preset is best suited to small, simple images like a signature or a low-detail scan rather than a full portrait photo, which will show visible quality loss at this size. Drop in your files, and the KB ruler below is already set to 20 — adjust it if you find the result too aggressive for what you actually need.