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Sign PDF Online Free

Sign PDF online free without signup. Draw, type, or upload your signature and place it anywhere on the page — files never leave your browser.

Signing a PDF without printing it is the most common reason to open a PDF tool at all. OpenPDF gives you three signature types — drawn, typed in a signature-style font, or uploaded from an image — and lets you place them anywhere on any page. The signature is composited locally with pdf-lib, so the signed file lands on your device without a single byte being uploaded.

How it works

  1. Upload the PDF. Drop the document you need to sign onto OpenPDF.
  2. Draw or type your signature. Draw with your mouse/finger, type your name in a signature font, or upload a signature image.
  3. Place the signature. Click where you want the signature to appear on the page and resize as needed.
  4. Download the signed PDF. Save the signed document locally. The signature is flattened into the PDF — pdf-lib runs locally so the file and signature stay on-device.

Common use cases

  • Signing a freelance contract with a drawn signature before emailing it back to the client.
  • Adding a company stamp-style signature to invoices before sending.
  • Signing a rental agreement on a phone browser without installing an e-signature app.
  • Replacing printing + scanning + shredding cycles for routine document signing.

Frequently asked questions

How do I sign a PDF online for free without signing up?

Open OpenPDF, drop the PDF, draw your signature with mouse/trackpad/finger (or type it in a signature font, or upload an image), place it on any page, and download the signed PDF. Free, no account, no watermarks, and the file never leaves your browser.

Can I sign a PDF online without uploading it to a server?

Yes. OpenPDF signs the PDF entirely in your browser using pdf-lib — the document and the signature never touch a server. Use it for contracts, NDAs and any document with sensitive data.

Is a drawn signature on a PDF legally valid?

A drawn, typed or uploaded-image signature is a "simple electronic signature" under eIDAS and most legal frameworks — valid for informal contracts, internal authorisations and most commercial agreements. For binding administrative use (e.g. tax filings, government forms), use the /sign-electronic tool with an X.509 certificate instead.

What kinds of signature can I create?

Three options: draw with a mouse, trackpad or touchscreen; type your name in a signature-style font; or upload a signature image (for example, a scanned hand-signed paper).

Can I place the signature anywhere?

Yes. After creating the signature, click on any page to place it. Drag to reposition and resize with the handles. You can add multiple signatures per document.

Is my signature image uploaded?

No. The signature is rendered and composited with pdf-lib locally in your browser. Neither the signature nor the PDF leave your device.

Why OpenPDF

OpenPDF is an independent project built around one principle: the PDFs you edit should never leave your device. Every tool — merge, split, sign, organize, annotate, compress, watermark, add page numbers — runs entirely in your browser using WebAssembly and modern JavaScript APIs. There is no upload step, no account, no email harvesting, and no premium tier gating the useful features. The codebase and the third-party scripts loaded for analytics and advertising are visible in the page source — Google AdSense and Google Analytics 4 load only after you accept cookies in the consent banner — so anyone can audit what is running before trusting the tool with sensitive contracts, scanned IDs, or financial documents.