How to Add a Digital Signature to a PDF Online — Free & No Upload Required
Signing PDFs should not require expensive software, cloud accounts, or sending your private documents to unknown servers. Here is how to do it entirely in your browser.
In 2026, you should not have to pay $15/month for the privilege of signing a PDF. Whether you need to sign a rental agreement, an NDA, a school form, or a client contract, it can be done for free in under a minute using just your browser.
3 Types of PDF Signatures — Which Do You Need?
Draw Signature
Use your mouse, trackpad, or touch screen to draw your actual handwritten signature on a canvas.
Best for: Personal documents, informal agreements
Type Signature
Type your name and choose from handwriting-style fonts to generate a signature automatically.
Best for: Quick sign-offs, professional correspondence
Cryptographic (PKCS#7)
A certificate-backed digital signature embedded in the PDF structure with verifiable identity.
Best for: Legal documents, contracts, official filings
Important: A drawn or typed visual signature (e-signature) and a cryptographic digital signature are not the same thing legally. In most jurisdictions, both are valid for contracts, but only cryptographic signatures provide verifiable tamper-evidence. Check your jurisdiction's e-signature laws.
Step-by-Step: Sign a PDF With iCreatePDF
- Go to iCreatePDF Sign PDF.
- Upload the PDF you need to sign.
- Click Add Signature — choose to draw, type, or upload an image of your signature.
- Drag and resize the signature overlay to position it on the correct signature line.
- Add to additional pages if needed using the page selector.
- Click Apply & Download — the signature is burned into the PDF and ready to share.
100% Private: Your document and signature are processed entirely in your browser. The signature canvas data never leaves your device — we have no server-side signature storage whatsoever.
Is a Browser-Based Signed PDF Legally Valid?
In most countries — including the United States (ESIGN Act), European Union (eIDAS Regulation), United Kingdom, India, and Australia — electronic signatures on contracts are legally binding when both parties intend to be bound.
The visual signature approach (draw/type) qualifies as a Simple Electronic Signature (SES) under eIDAS and is valid for most everyday contracts, agreements, and acknowledgements. For high-value legal transactions requiring a Qualified Electronic Signature (QES), you would need a certificate from a Trust Service Provider (TSP).
How to Verify a Signed PDF
Once a document has been signed with a cryptographic certificate, you can verify its authenticity using iCreatePDF's Verify Signature tool. It reads the embedded PKCS#7 signature block, extracts the signer identity and timestamp, and performs a byte-range integrity check — all locally in your browser.
Frequently Asked Questions
Can I sign a PDF on my phone?
Yes. iCreatePDF Sign PDF works on mobile browsers. Use the draw mode with your finger for a natural handwritten signature.
Can I add my signature image instead of drawing it?
Yes. You can upload a PNG image of your handwritten signature (ideally on a white or transparent background) and position it on the document.
Does signing a PDF lock it from editing?
The visual signature is burned into the PDF layer — you can still edit other parts if the PDF is not password-protected. Use the Protect PDF tool to restrict editing after signing.
Will the recipient be able to see my signature?
Absolutely. The signature is embedded as visible content on the specified page and position, viewable in any PDF reader.