How to Digitally Sign a PDF — Free, Private, No Adobe

Need to sign a contract, approval form, or agreement sent as a PDF? You don't need Adobe Acrobat, a printer, or a scanner. Modern browser-based tools let you sign any PDF in seconds — for free, with your signature never leaving your device.

There are three common ways to sign a PDF:

• Drawn signature — you draw your signature with a mouse, trackpad, or finger (on mobile). Looks exactly like your real handwritten signature.
• Typed signature — type your name and choose from signature-style fonts. Fast and clean, widely accepted for most documents.
• Image upload — take a photo of your physical signature and upload it as a PNG or JPG. Closest to your actual signature with a transparent background.

For legal purposes, all three are considered electronic signatures and are legally valid in most countries under laws like ESIGN (US), eIDAS (EU), and PIPEDA (Canada).

1. Open the PDF Sign tool — go to FileNaut's Sign PDF. No account or signup required.
2. Upload your PDF — drag and drop or click to browse. Your file loads instantly in the browser — nothing is sent to any server.
3. Click "Add Signature" — a signature panel will open.
4. Create your signature — choose to draw it (mouse/finger), type it, or upload a saved signature image.
5. Place it on the page — click where you want the signature to appear. Drag to reposition, resize from the corner handle.
6. Add date or initials — use the text tool to add a date box or initials box if the document requires it.
7. Download your signed PDF — click Download. Your signature is permanently embedded in the PDF.

The whole process takes under a minute. Your document never leaves your browser.

Your drawn signature is only as good as your input. Here are tips for each method:

• Drawing on desktop: Use a trackpad for smoother strokes than a mouse. Draw slowly and deliberately — this becomes your signature image.
• Drawing on mobile: Use your finger or a stylus directly on the signature pad. Mobile touch input is naturally smoother.
• Uploading an image: Sign on white paper with a black pen, photograph or scan it, then remove the white background using our background remover before uploading. This gives you a clean transparent PNG that looks professional on any PDF.
• Typed signature: Works best for legal documents where appearance matters less than the signed name being legible and in a signature-style font.

Yes — electronic signatures are legally valid for most everyday documents. Here's the legal framework:

• United States: The ESIGN Act (2000) and UETA give electronic signatures the same legal standing as handwritten ones.
• European Union: eIDAS regulation recognizes electronic signatures for most commercial transactions.
• Canada: PIPEDA and provincial electronic commerce acts recognize e-signatures.
• UK: Electronic Communications Act 2000 validates e-signatures.

Documents that typically still require wet (ink) signatures or advanced e-signatures:

• Wills and testamentary documents (in most jurisdictions)
• Real estate transactions (varies by location)
• Court orders and legal filings
• Notarized documents

For everyday business — contracts, NDAs, invoices, HR forms, approval documents — a drawn or typed signature on a PDF is fully legal and enforceable.

There's an important distinction between a simple e-signature and a certified digital signature:

For the vast majority of business documents, an e-signature is all you need. Certified signatures are typically required only in regulated industries or government contexts.

• Save your signature once, reuse forever — draw your signature, right-click the downloaded PNG and save it to your desktop. Next time, just upload the image instead of drawing again.
• Check for signature fields — many forms have designated signature boxes. Zoom in to find them and place your signature precisely inside.
• Add the date near your signature — use the text tool to add today's date. Most contracts require both a signature and date.
• Sign on the correct page — multi-page documents often have signature lines on the last page or on specific pages. Navigate carefully before placing your signature.
• Review before downloading — zoom out to review the full document once signed. Make sure nothing is covering important text and the signature is where it should be.