How to compress an image to 10KB
- Choose your signature, thumbprint or photo. Crop away empty space first for the sharpest result.
- The target is set to 10 KB. Change it if your form allows more, like 20 KB.
- Click Compress to 10KB and download an image under the limit.
About the Compress Image to 10KB tool
Some online forms only accept tiny files for signatures and thumb impressions — often 10 KB or less — while a phone photo is hundreds of times bigger. This tool lowers the quality and, when needed, the size of the picture until it fits, choosing the sharpest version that stays under your limit. Signatures in dark ink on white paper compress best.
100% free
No limits, no watermarks and no sign-up.
Private
Your images are processed on your device and never uploaded.
Fast
No uploading or waiting in a queue. Results in seconds.
Works everywhere
Windows, Mac, iPhone, Android and Chromebook.
Frequently asked questions
Will a photo still look good at 10 KB?
Only at a small size. 10 KB is fine for signatures and small ID photos, but a large photo has to shrink a lot. If your form allows it, use 20 KB or 50 KB for a clearer picture.
How do I get a sharp signature?
Sign with a dark pen on plain white paper, take the photo in good light, and cut away the empty space with Signature Resizer before compressing.
My form also asks for exact dimensions. What should I do?
If it asks for a size like 140 × 60 pixels, crop and resize first with Signature Resizer, then compress here.
Is my signature uploaded?
No. Everything happens in your browser, so your signature never leaves your device.