No upload, 100% local, no account

Signature Generator

Draw a signature and export it as a transparent PNG or a data URI.

How Signature Generator works

The Signature Generator is a drawing pad: sketch a signature with your mouse, finger or stylus, then export it as a transparent PNG or copy it as a base64 data URI you can paste straight into an HTML img tag or a document template. Pressure from a stylus or touchscreen is picked up when the browser reports it, giving thinner tails and thicker strokes the way a real pen does.

This is honestly a hand-drawn image, not a cryptographic digital signature: it carries no legal or identity guarantee, the same way a scanned paper signature does not. If you need to actually place a signature image onto a PDF page, pair this tool with /pdf-sign, which handles the placement and export of the signed document.

Written by Bastien Sulyan

How to use Signature Generator, step by step

  1. Draw your signature on the pad using a mouse, finger or stylus.
  2. Adjust the pen color and stroke width if needed.
  3. Download the signature as a transparent PNG, automatically cropped to the drawn area, or copy it as a data URI.
  4. Use the PNG in /pdf-sign to stamp it onto a PDF page, or paste the data URI directly into an image tag.

Common use cases

  • Creating a transparent signature image to drop into a PDF with /pdf-sign.
  • Getting a quick base64 data URI of a signature to embed in an HTML email template or internal tool.
  • Signing off on an internal document image without installing signature software.

Frequently asked questions

Is this a legally binding electronic signature?

No. It produces a hand-drawn image of a signature, comparable to signing on paper and scanning it. It carries no cryptographic proof of identity or intent. For anything requiring a legally recognized e-signature, use a qualified signing service instead.

Why is the exported PNG transparent?

The background is transparent by default so the signature can be layered over any document or template, such as a PDF page in /pdf-sign, without a white box covering existing content.

What does the data URI copy button do?

It copies the PNG encoded as a base64 "data:image/png;base64,..." string to your clipboard, which you can paste directly as the src attribute of an HTML img tag or into any tool that accepts a data URI, without hosting the image file anywhere.

Is my drawing uploaded anywhere?

No. The drawing happens on a canvas element inside your browser tab. The PNG export and data URI conversion also run locally; nothing is sent to a server.