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InstantTools
PDF · 100% browser-side

Sign PDF

Sign documents without uploading them to anyone's server.

Free foreverNo uploadsNo account
Runs locallyYour document and signature are processed in your browser — 0 bytes uploaded
Drop a PDF here or click to browse
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Your privacy matters

All files are processed locally in your browser. Nothing is uploaded to our servers, so your documents remain private and secure.

01 · Real-world fits

Common use cases

  • Signing contracts, offer letters, and agreements received by email
  • Adding your signature to lease documents and consent forms
  • Initialing multiple pages of a document quickly
  • Signing sensitive paperwork without uploading it to an e-sign service
  • Re-signing scanned forms without printing them
02 · The honest pitch

Why Sign PDF?

E-signature services upload your contract to their cloud and often paywall basic self-signing. This tool embeds your signature directly into the PDF inside your browser — the document and your signature never touch a server, and there is no account, watermark, or per-document limit.

Sign PDF keeps the job narrow: sign documents without uploading them to anyone's server. It is built for the small but frequent moments when opening a heavyweight editor, installing a package, or uploading sensitive work to a random service is more friction than the task deserves.

03 · Edge cases

Frequently asked questions

For many everyday agreements, a drawn or typed signature embedded in a PDF is accepted, but legal validity depends on your jurisdiction and the document type. This tool performs simple self-signing — it does not provide certified digital signatures or multi-party audit trails.