No upload, 100% local, no account

Sign a PDF

Draw your signature, drop your PDF, choose where it goes, everything stays on your device.

How Sign a PDF works

PDF Sign lets you draw a handwritten signature with your mouse or finger, then stamp it onto a chosen position on one or more pages of a PDF. The signature is captured as a PNG image and embedded into the page content using pdf-lib, which runs entirely in your browser. The PDF and your signature image never leave your device.

Be clear about what this tool provides: it creates a visible ink-style image placed on the page. It is not a cryptographic digital signature. The stamp cannot be independently verified by a PDF viewer as authentic, and it does not provide the legal guarantees of a certificate-based signature created through a qualified electronic signature authority. For personal use, consent forms, internal approvals and informal agreements, a visible handwritten stamp is often sufficient. For contracts with strict legal requirements or electronic signature compliance, a certificate-based signing solution is the appropriate choice.

Written by Bastien Sulyan

How to use Sign a PDF, step by step

  1. Load the PDF you need to sign.
  2. Use the signature pad to draw your signature with mouse or touch.
  3. Position the signature stamp on the page by dragging it to the correct location.
  4. Adjust the size if needed.
  5. Click apply and download the signed PDF.

Common use cases

  • Sign a consent form or internal approval document that does not require a legally certified signature.
  • Add a handwritten-style signature to a cover letter before converting it to PDF for submission.
  • Approve a design proof by stamping your signature on the relevant page before returning it to the agency.
  • Sign a rental application or informal agreement where a visible signature is accepted by both parties.

Frequently asked questions

Is this a legally binding digital signature?

No. The tool creates a visible image of your drawn signature and places it on the PDF page. It is not a cryptographic signature backed by a certificate authority, and a PDF viewer cannot verify its authenticity through a digital trust chain. For contracts requiring qualified electronic signatures under regulations such as eIDAS, a certificate-based signing service is required.

Can the signature be removed or altered after I apply it?

Because the signature is written into the page content stream rather than stored as a removable annotation, it cannot be toggled off in a standard PDF viewer. A user with a PDF editor could attempt to overwrite or delete it, but it is not trivially removable. If tamper-evident signing matters, use a cryptographic solution.

Can I reuse a saved signature image?

Yes. You can save the drawn signature as a PNG from the signature pad and upload that image in a future session. This avoids having to redraw the signature each time.

Does my drawn signature leave my browser?

No. The signature pad captures your drawing into browser memory as an image. pdf-lib then embeds that image into the PDF page content in memory. Both the signature and your PDF stay on your device throughout, and neither is transmitted to any server.

Can I place the signature on a specific page rather than all pages?

Yes. You select which page to place the signature on. If you need to sign multiple pages, you can apply the signature to each page individually.

What happens to the existing text and content on the page?

The signature image is placed on top of the existing content at the position you choose. The underlying text layer, images and page structure are not modified. If you place the signature over text, that text may be obscured, so choose an empty area or the signature field if one is present.

Do I need to create an account to sign a PDF, like with DocuSign?

No. This tool applies a visible signature directly in your browser, with no account, no email verification workflow and no per-document fee. It also does not build the certified audit trail a dedicated e-signature service provides, so for contracts that require that level of legal certification, use a qualified electronic signature provider instead.

Can I sign a PDF on my phone or tablet?

Yes. Drawing a signature with a finger on a touchscreen works the same way as drawing with a mouse, and many people find a signature actually looks more natural drawn by hand on a phone. A stylus gives the cleanest result if your device supports one.