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Signature Extractor
Turn a phone photo of your handwritten signature into a clean, transparent PNG.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Signature Extractor works
The paper colour is measured across the photo in small tiles, so shadows and uneven light are ignored. Pixels clearly darker than the paper become ink, with smooth edges, in the colour you choose, and everything else turns transparent. It is then cropped to the signature.
Input: JPG, PNG, HEIC. Output: PNG.
How to use Signature Extractor
- Sign on white paper and take a photo.
- Drop the photo here.
- Adjust ink strength and colour.
- Download the PNG and place it with Sign PDF.
Tips
- Most image tools accept many files at once.
- WebP and AVIF give much smaller files than JPG at the same visual quality.
- Set a default image quality in Settings. Tools that do not choose their own quality use it.
Signature Extractor FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
Related tools
- Sign PDF: Draw, type or upload a signature and place it anywhere, plus dates and initials.
- Background Remover: Remove image backgrounds with on-device AI. Replace with color or blur.
- Change Image Colours: Swap one colour for another or make a colour transparent, with tolerance and soft edges.
- Image Compressor: Shrink images in bulk with quality and width controls and live savings.