To compress an image to under 20 KB, use a size-based compressor: set the target to 20 KB and it lowers the quality just enough to fit while keeping the photo as clear as possible.

🎯
Compress an Image to 20 KBPick the exact target size, compress, and download — nothing is uploaded.
Open the tool →

Who needs this

  • Old government portals with a strict 20 KB photo or signature cap
  • Signature uploads (many forms limit signatures to 10–20 KB)
  • Low-bandwidth forms that reject anything larger

How to do it

  1. Open the compress-to-size tool.
  2. Add your photo — it opens only in your browser.
  3. Set the target to 20kb and compress.
  4. Download it and upload it to your form.

Why "reduce quality" isn't enough

Dragging a quality slider is guesswork — you export, check the size, and it's still over the limit. A size-based tool aims at the number instead, so it fits on the first try and stays as clear as the limit allows.