Free tool
Signature resize & clean
Crop your signed paper, whiten the background and fit any KB limit (10–20 KB etc).
Add your file
Get your result
Sign with a black or blue pen on plain white paper, then take a photo in good light.
About this free tool
Signature resize & clean — free online tool
Online forms often reject signatures that are too big, too small or on grey-looking paper. Upload a photo of your signature and Capyboat whitens the paper, crops tightly around the ink and saves it at the exact pixel size and KB limit you need.
The default is a common 10–20 KB JPG, and every value can be changed to match your form.
Great for
- Exam applications
- Bank & KYC forms
- Job portals
- Scholarship forms
Highlights
- Cleans shadows and makes paper pure white
- Auto-crops around the signature
- Exact pixels and KB range
- Private — runs on your device
How to use Signature resize & clean
- 1Add a clear photo or scan of your signature on white paper.
- 2Choose your settings (width (px), height (px), min size (kb)).
- 3Press “Run Signature resize & clean”, check the preview and download the result.
Questions about Signature resize & clean
Is Signature resize & clean free to use?
Yes. Signature resize & clean on Capyboat is completely free, with no sign-up, no watermark and no daily limit.
Are my files safe?
Yes. Signature resize & clean runs entirely inside your browser, so your files are never uploaded to any server.
Anything I should know before using Signature resize & clean?
Sign with a black or blue pen on plain white paper, then take a photo in good light.
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