Sign PDF · 3 min read

How to Add a Digital Signature to a PDF — Free Methods

There are multiple free ways to add a signature to a PDF — from drawing to typed to uploaded image. Here are all methods and when to use each.

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Method 1 — Draw Your Signature

Go to pdfeditor.onl/sign-pdf. On the canvas, draw your signature with mouse, trackpad, or stylus. Most natural-looking result — closely resembles a handwritten signature.

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Method 2 — Type in Handwriting Font

Type your name in the signature field and select a handwriting-style font. Fast for anyone who has difficulty drawing precisely on a trackpad.

Tip: Typed signatures in a professional handwriting font are legally valid as electronic signatures in all major jurisdictions.

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Method 3 — Upload Signature Image

Sign your name on white paper. Photograph it with your phone. Crop to the signature area. Upload the image PNG to the sign tool. Best for: those who want an exact replica of their physical signature.

Add Signature to PDF — Free →

Frequently Asked Questions

Are all three signature methods legally valid?

Yes. Drawn, typed, and uploaded signature images are all valid electronic signatures under e-signature laws (ESIGN Act, eIDAS, etc.).

What is the difference between electronic and digital signature?

Electronic signature: any electronic mark indicating intent to sign (drawn, typed, image). Digital signature: a PKI-based cryptographic certificate. For most contracts, electronic signatures are sufficient.

Is this free?

Yes — completely free at pdfeditor.onl/sign-pdf.

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