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Compress Image to 20KB

This tool runs in your browser and needs JavaScript.

To compress an image to 20KB, select your photo above and download the result. The tool keeps the highest quality that fits, and only shrinks the picture if it must. Limits this small usually apply to signatures on exam and job application forms.

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How to compress an image to 20KB

  1. Select your photo; 20KB is already set. Your compressed photo appears straight away.
  2. Fix the framing if needed. Use Crop or Rotate, then select Download.

What fits in a 20KB image?

20KB is tight. It suits small, simple images such as a signature on white paper. Our detailed 12-megapixel test photo had to shrink to about 870 pixels wide to fit, so expect some softness in a full photo.

  • Signatures on exam and job forms
  • Small thumbnails

Tip: Crop close to the signature or face first. Every pixel of empty background you remove leaves more of the 20KB for what matters.

Frequently asked questions

How do I compress an image to 20KB?

Select your photo at the top of this page. The 20KB target is already set, and the result is ready to download in moments. The tool finds the highest quality that fits, and shrinks the picture only if it has to.

Why does my 20KB photo look blurry?

A full photo has a lot of detail to fit into very few bytes, so it has to lose pixels. Crop closer to your face, or check whether your form really needs 20KB, since many photo uploads allow 50KB.

How do I get a signature under 20KB?

Photograph it on plain white paper in good light, crop tightly around the ink, and set the size your form asks for. Signatures compress very well because most of the image is plain white.

Is my photo uploaded anywhere?

No. The photo is processed by your own browser and never sent to our server, so this tool also works for ID photos and signatures. You can check by turning off your internet after the page loads: it keeps working, except that an iPhone HEIC photo needs one small download the first time.

Other sizes

Last reviewed against published form requirements. Rules change, so always follow your own form’s notice.

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