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Sign PDF Online Free

Sign PDFs with 3 input types (drawn canvas, typed name or uploaded PNG/JPEG image) and place the result on a page. Processing runs locally in your browser; no signup.

  • Draw, type, or upload your signature
  • Place signatures anywhere on any page
  • Signature composited via pdf-lib in the browser — file never uploads

Signing a PDF without printing takes 1 of 3 paths — draw on a canvas, type your name in a signature-style font, or upload a PNG/JPEG image. OpenPDF composites the signature locally with pdf-lib and lets you place it on the selected page(s). Review the exported PDF and the recipient's requirements before sharing.

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 a page, and download the signed PDF. No account or watermarks; document processing happens locally in your browser.

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

OpenPDF signs the PDF in your browser with pdf-lib, so the document content is not uploaded for processing. Optional services can have their own network and data conditions; review the policy before using a sensitive document.

Is a drawn signature on a PDF legally valid?

A drawn, typed or uploaded-image signature is a simple electronic signature, but its acceptance and effects depend on the document, the parties and applicable rules. If the recipient requires a certificate, use /sign-electronic and check that recipient's requirements.

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?

The signature is rendered and composited with pdf-lib locally in your browser, so the document content is not uploaded for processing. Optional services can have separate network and data conditions.

Why OpenPDF

OpenPDF is an independent project where PDF document processing runs in the browser using WebAssembly and modern JavaScript APIs. The toolkit includes merge, split, sign, organize, annotate, compress, watermark, page numbers, add image and fill forms. Practical limits depend on the operation, document and device. The page source and privacy policy describe consent controls, analytics, advertising and optional services before you use the tool with sensitive documents.

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