How do I sign a PDF document online for free?

Upload your PDF into the DocTool workspace, click 'Add Signature', draw with your mouse/touchscreen or type your name in cursive, place the signature box onto the designated line, and download your signed file.

Can I add date stamps, initials, or custom checkmarks?

Yes! You can add text fields (such as dates, titles, and company names) alongside your signature anywhere on any page.

Is a signed PDF from DocTool legally binding?

Yes. Electronic signatures on DocTool comply with the US ESIGN Act and European eIDAS standards for general agreements, contracts, receipts, and NDAs.

Sign PDF

Add legally binding digital signatures, draw your signature, or upload initials to contracts.

or drop file here

Files stay private. Processed 100% locally in your browser.

Free service for documents up to 25 MB.

How To Use Sign PDF Online For Free

Add legally binding digital signatures, draw your signature, or upload initials to contracts. Processed 100% locally and privately in your browser with zero server uploads and zero ads.

1. Upload Document

Import contracts, agreements, or forms requiring signature.

2. Create & Position Signature

Draw smoothly with mouse/stylus or type cursive signature and place on the signing line.

3. Download Legally Signed PDF

Bake your signature permanently into the vector PDF stream and download instantly.

Why Choose DocTool Sign PDF?

Built for speed, client-side privacy, and flawless document output with zero ads and zero watermarks.

100% Client-Side Private

Files process directly in your browser using WebAssembly. Your documents never touch external servers or cloud databases.

Zero Watermark Added

Export clean, professional, publication-ready files without any stamps, logos, or forced branding.

Instant Processing with Zero Queue

Instant optimization and editing with zero queue times, zero server latency, and batch processing support.

100% Free Forever with Zero Popups

No account registration, no credit card, and zero intrusive ads. Enjoy uninterrupted productivity on any device.

Frequently Asked Questions

Everything you need to know about using Sign PDF on DocTool.

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