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Sign PDF

Add your handwritten signature to any PDF document.

How it works

Step 1

Upload your file

Drag & drop or click to select your PDF from your device, Google Drive, or Dropbox.

Step 2

Process

Our servers instantly run Sign PDF on your file — no plugins or software required.

Step 3

Download

Your result is ready in seconds. Click download and you're done.

Frequently asked questions

How do I sign a PDF for free?
Upload your PDF, draw your signature with your mouse or finger (touch screen), place it on the signature line, and download the signed document. No account needed.
Is an electronic signature on a PDF legally valid?
In most countries, a drawn electronic signature is legally equivalent to a handwritten signature for standard documents. For contracts requiring certified digital signatures (e.g. real estate transactions), use a qualified electronic signature service.
Can I sign a PDF on iPhone or Android for free?
Yes. Open pdftoolz.io/tools/sign-pdf in Safari or Chrome on your phone, draw your signature with your finger, place it, and download. No app installation needed.
Can I save my signature for reuse?
If the tool offers signature saving, your signature is stored locally in your browser for convenience. For privacy, signatures are not stored on our servers.
What is the difference between a drawn signature and a digital certificate signature?
A drawn signature is a visual image placed on the page — easy to create, visually identical to a physical signature, but without cryptographic verification. A digital certificate signature uses PKI to cryptographically bind the signer's identity to the document.
Can I sign multiple pages of a PDF?
Yes. Place your signature on as many pages as needed before clicking Apply and downloading the final signed PDF.