Compress an image to 20 KB
Get a signature or small photo under 20 KB, privately.
Signature uploads are usually capped at 10 to 20 KB, a size most phone photos overshoot by a factor of a hundred. This page opens the compressor preset to 20 KB. It keeps as much quality as the limit allows and reduces the dimensions only when it has to, so the signature stays readable.
How to compress an image to 20 KB
- 1
Add the signature or photo
A photo of your signature on white paper works well. The target is preset to 20 KB.
- 2
Keep "Save as" on JPG
Most exam and government portals only accept JPG.
- 3
Compress and check the size
The result shows the final size and any resizing, so you can upload with confidence.
Why keep your signature off other servers
A scanned signature is exactly the kind of file you should not hand to a random website. Compressing it locally means it never leaves your device.
Need the photo too?
Photos usually get a larger allowance, commonly 50 KB.
Frequently asked questions
Will my signature still be readable?+
Yes. Signatures are simple dark lines, which compress very well. Crop tightly around the signature first for the best result.
What if it cannot reach 20 KB?+
The tool says so instead of hiding it. That usually happens with a large, busy photo; cropping it first fixes it.
Is my signature uploaded?+
No. It is processed inside your browser and never leaves your device.
Do I need 10 KB instead?+
Type 10 in the target size box. Anything from a few KB upward works.