How to use and verify
In Draw mode, use a finger, pen or mouse to make your signature. Adjust the pen width and undo individual strokes when needed. A keyboard alternative lets you type a name and insert it on the canvas. This uses a font available on your device; it does not reproduce your handwriting or verify your identity.
To extract a signature already written on paper, choose From photo. Dark ink on plain, light paper works best. PNG, JPEG and WebP files are accepted up to 10 MB and 16 megapixels. Large supported photos are reduced to a maximum long side of 1,600 pixels to limit working memory. Unsupported formats and oversized images are rejected before full processing.
Adjust the white-background removal slider while checking that thin strokes remain visible. The method uses pixel brightness rather than an AI model, so it cannot reliably distinguish handwriting from shadows, ruled lines, stains or a complex background. It is not designed for white ink on dark paper. Crop the source around the signature first if necessary, and inspect the saved result against both light and dark backgrounds.
The checkerboard shows transparent areas and is not part of the saved file. Saving creates a separate PNG, trimmed around visible ink with a small margin. An empty canvas cannot be saved. Originals are not overwritten, and inputs are neither uploaded nor automatically stored. Download what you need before refreshing. This tool creates an image; it does not certify identity, protect a signed document against alteration or determine a contract’s legal validity.
FAQ
Are files or names uploaded?
No. Processing happens in browser memory without sending inputs to a server or external API. Close the tab after using a shared device.
Is the original overwritten?
Original files are unchanged. Save or copy the result separately. Change the input and run again to create a new result.
What should I check at the end?
Best for dark ink on light paper. Photos: up to 10 MB / 16 megapixels. The checkerboard is transparency and is not saved. This creates an image, not a digital-signature certificate.