To sign a PDF without uploading it, open the Sign PDF tool, draw or type your signature, place it on the page, and download the signed file — every step happens in your browser. No account, no servers holding your contract, no signature image stored anywhere but your own device. Free, and it works offline once the page has loaded.
What you're actually sending when you "sign online"
The typical online signing flow uploads two sensitive things at once:
- The document — often a contract, lease, offer letter, or medical form: precisely the documents with names, terms, and money in them.
- Your signature image — a clean, reusable image of how you sign, now stored on a server you don't control, associated with your identity.
For multi-party workflows with audit trails, that infrastructure earns its keep. But the most common signing task is simpler: someone emailed you a PDF, and they need it back with your signature on it. Uploading the contract and your signature to a third party to accomplish that is pure overhead — and pure exposure.
Step by step
- Open the Sign PDF tool and drop in the document. It loads into browser memory only.
- Create your signature. Draw it with mouse, trackpad, or finger; type it in a signature style; or upload an image of your real signature if you keep one (the image stays local too).
- Place and size it. Click where the signature belongs, drag to position, resize to fit the line. Add initials or dates on other pages the same way.
- Download. The signed PDF is generated in your browser and saved to your device. The document and signature existed only on your machine throughout.
- Optional finishing touches: strip metadata with the Metadata Viewer before sending, or compress if the recipient's inbox has limits.
When you need more than this
Be clear about what a placed signature is and isn't:
- It is an electronic signature suitable for the everyday run of agreements, forms, acknowledgments, and letters — the things people actually sign weekly.
- It is not a cryptographic digital signature (certificate-based, tamper-evident) and not a managed signing ceremony with verified identities and an audit trail. Court-grade non-repudiation and regulated workflows need those; everyday signing does not.
If your counterparty requires a managed platform, use theirs. For everything else, the local path is faster and exposes nothing.
The offline test
Here's the proof this tool is what it claims: load the page, turn on airplane mode, and sign your document. It works, start to finish, because there is no server involved — the engines (pdf-lib, PDF.js, open source) run entirely in your browser. Any signing site that breaks the moment your connection drops is telling you where your contract is going.