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Sign a PDF Online

Draw your signature with a mouse, finger or stylus, click where it should go on the page, and save the signed PDF.

Add a PDF to sign

or drag and drop a file here

Accepts a single PDF. This places a drawn signature image — it is not a certificate-based digital signature and carries no cryptographic identity.

How to sign a PDF

  1. Add your PDF.
  2. Draw your signature in the signature box and click Use this signature.
  3. Pick the page, then click on the preview where the signature should go. Adjust its width with the slider.
  4. Click Sign PDF and download the signed document.

Supported files and limitations

  • The signature is drawn on your device and embedded as a PNG image with a transparent background.
  • This is a visual signature — fine for everyday paperwork, but it is not an e-signature with a certificate, timestamp or audit trail. For legally regulated signing, use a dedicated e-signature service.
  • One signature per pass; run the tool again to sign multiple pages.
  • Neither the document nor your signature is uploaded or stored anywhere.

Signing on a specific device

Every platform has a different built-in option worth knowing — Markup on iPhone, Preview on Mac, ink in Edge — compared honestly in the device guides: iPhone, Android, Mac or Windows.

Common problems

  • “Draw your signature first” — press Use this signature after drawing before you can sign.
  • The signature looks jagged — draw it larger in the box and shrink it with the width slider; it keeps more detail that way.

What happens to your files?

This tool runs entirely in your browser. Your file is opened in your device's memory, processed there, and the result is saved back to your device. The document is never uploaded to a server. You can confirm this yourself: open your browser's developer tools, switch to the Network tab, and process a file — no request contains your document. Closing the tab discards everything. See how local processing works.

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