Sign PDF Online Free

Sign PDF Online Free

Sign PDF is a free electronic signature tool that lets you draw your handwritten signature and add it to any PDF document directly in your browser. No Adobe Acrobat, no DocuSign subscription, no software installation required. Just upload your PDF, draw your signature, position it on the page, and download your signed document instantly.

Why Use Electronic PDF Signatures?

Electronic signatures have become the standard for modern business workflows. They eliminate the need to print, sign, scan, and email documents — saving time, paper, and effort. Whether you are signing contracts, agreements, consent forms, approval letters, or internal documents, a digital signature on a PDF is universally accepted in most professional and business contexts.

Our Sign PDF tool is powered by Fabric.js for smooth, natural signature drawing, and PDF-lib for embedding the signature permanently into the PDF. Everything happens locally in your browser — your document and signature data are never uploaded to any server.

How to Sign a PDF

Upload your PDF file using the file selector or drag and drop. The tool will render your PDF and display a signature drawing canvas. Use your mouse (on desktop) or finger (on touchscreen devices) to draw your signature. Once satisfied, position the signature on the correct page and location. Click Process to embed the signature permanently into the PDF and download the signed document.

Key Features

Draw Signature: Natural freehand drawing on a smooth canvas.
Touch Support: Works on smartphones and tablets with touch input.
Image Upload: Upload a PNG image of your existing signature instead of drawing.
Permanent Embedding: Signature is flattened into the PDF — not a floating layer.
Privacy First: Your document never leaves your device.

Frequently Asked Questions

Is this legally binding?
Electronic signatures are legally recognized in many countries under laws such as the US ESIGN Act and the EU eIDAS regulation. However, legal validity depends on jurisdiction and document type. Consult a legal professional for high-stakes documents.

Can I sign the same PDF multiple times?
Yes. You can re-upload the signed PDF and add additional signatures as needed.