Sign a PDF — free, in your browser

Draw or type your signature, place it, download. No signup. No watermark.

🔒 File never leaves your device Works on Mac · Windows · iPhone · Android 100% free
Drop your PDF here
or click to choose a file — stays on your device
No PDF handy? Try the sample document

Private by design: this signer runs entirely in your browser — your document is never uploaded to any server.

document.pdf

✅ Signed and downloaded

Your signed PDF is in your Downloads folder. Nothing was uploaded — the whole thing happened on your device.

Need more than a quick signature?

The free PrimeDocu app adds document scanning, AI summaries before you sign, encrypted storage, and sending documents to others for signature with a full audit trail.

App Store Google Play Use on the web

A free PDF signer that never sees your document

Most "free" online PDF signers upload your contract, lease, or medical form to their servers before signing it. This one doesn't. The PDF is opened, signed, and saved entirely in your browser using on-device processing — you can even switch off your Wi-Fi after the page loads and it still works. That matters when the document you're signing is exactly the kind of document you don't want floating around someone's cloud.

🖊 Draw or typeSign with your mouse, trackpad, finger, or stylus — or type your name in a signature style.
🔒 No upload, everProcessing happens on your device with in-browser JavaScript. Your file never touches a server.
🆓 Actually freeNo signup, no watermark, no page limits, no trial. Free is the point.
💻 Any deviceMac, Windows, Linux, iPhone, iPad, Android — anything with a modern browser.

How to sign a PDF online (3 steps)

Signing on a Mac?

This tool is the fastest way to sign a PDF on a Mac without installing anything — it runs in Safari or Chrome. No Preview markup fiddling, no $20/month Adobe subscription. It works the same way on iPhone and Android.

When you need more than a quick signature

This page covers the "sign it and send it back" case. The free PrimeDocu app covers everything around it: scan paper documents, get an AI summary before you sign, keep files in end-to-end encrypted storage (1 GB free), and send documents to other people for signature with a tamper-evident audit trail — like DocuSign, but $0.

Frequently asked questions

Is this really free?

Yes. No account, no watermark, no limits on this page. PrimeDocu is funded by optional Pro plans in the app — the essentials stay free.

Is my file uploaded anywhere?

No. The PDF is processed by JavaScript running in your browser. It never leaves your device — there is no server to upload it to on this page.

Is a drawn or typed signature legally binding?

For most everyday documents, yes — e-signatures are recognized under the U.S. ESIGN Act, eIDAS (EU), and similar laws worldwide. Read more: are electronic signatures legally binding? For signatures that need identity verification and an audit trail, use Request Signature in the app.

Can I sign a password-protected PDF?

Not here — encrypted PDFs can't be modified without the password. Remove the password first, or open it in the PrimeDocu app.