How to Add an Electronic Signature to PDF Online Free

Signing PDF documents no longer requires printing, signing by hand, and scanning. PDF-one lets you add an electronic signature to any PDF directly in your browser — free, instant, no account required.

Three Ways to Create Your Signature

Option 1: Draw Your Signature

Use your mouse, trackpad, or touchscreen to draw your signature naturally. This creates a personal, handwritten-style signature that looks authentic.

Option 2: Type Your Signature

Type your name and choose from styled signature fonts. This is the fastest method for a clean, professional-looking result.

Option 3: Upload a Signature Image

If you have a pre-made signature image (PNG with transparent background works best), upload it directly to use your existing signature.

Step-by-Step: Sign a PDF Online

1. Upload your PDF at pdf1.com — no login required
2. Click the Signature tool in the toolbar (pen icon)
3. Create your signature using one of the three methods above
4. Click on the PDF page where you want to place it
5. Resize and reposition by dragging the corners or body
6. Click Download — your signature is embedded in the PDF

Is Electronic Signature Legally Valid?

Electronic signatures are legally recognized in most countries:

• USA: ESIGN Act and UETA (Uniform Electronic Transactions Act)
• EU: eIDAS Regulation (qualified electronic signatures)
• UK: Electronic Communications Act 2000

For most business documents — contracts, NDAs, agreements, forms — an electronic signature created in PDF-one is legally equivalent to a handwritten signature. For documents requiring notarization or advanced cryptographic verification, consult legal counsel.

Frequently Asked Questions

Q: Is adding a signature to PDF free in PDF-one? A: Yes. The signature feature is completely free with no registration required.

Q: Can I sign multiple pages? A: Yes. Place your signature on each page individually by repeating the placement step.

Q: Can others verify my signature is authentic? A: Signatures added with PDF-one are visual signatures embedded in the PDF. For cryptographically verified signatures with a certificate chain, a dedicated digital signature service is required.

Q: Is my signature stored by PDF-one? A: No. Your signature is created locally in your browser session and embedded in the PDF. It is not stored on PDF-one's servers beyond the session.

Q: What file formats can I upload as a signature image? A: PNG (with transparent background recommended), JPG, and most common image formats are supported.