Sign PDF Privately
Sign PDF privately with ContinuePDF, where your PDF is processed entirely inside your own browser and never uploaded. For sensitive documents — contracts, medical records, tax forms, IDs — the safest tool is one that physically cannot see your file. Because the sign step runs locally, there is no server copy to leak, subpoena, or breach.
Start Sign PDF NowHow to Sign PDF Privately
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Open the tool (optionally go offline)
Load Sign PDF once. You can even disconnect from the internet afterwards — it still works.
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Add your PDF locally
Your file is read into the browser tab on your device. It is not transmitted anywhere.
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Download and close the tab
Save signed PDF. Closing the tab clears the file from memory — no trace is left behind.
What you can do with Sign PDF
Signing adds your actual signature to a PDF — drawn, typed, or uploaded as an image — and places it exactly where the document needs to be signed, so you can return it without printing.
Sign a contract fast
Add your signature to an agreement and send it back the same day, with no scanner or printer needed.
Handle forms remotely
Sign school, medical, or HR forms from home and email the signed copy straight back.
Initial every page
Place your initials on each page of a multi-page contract where that is required.
Reuse a saved signature
Sign recurring paperwork with a consistent, professional-looking signature every time.
How ContinuePDF keeps Sign PDF private
Most online PDF tools follow the same pattern: your file is uploaded to a server, processed there, and a link to the result is sent back. That means a copy of your document sits on someone else's computer, at least temporarily — and you have to trust their retention policy, their staff, and their security. For confidential material, that is a real risk.
ContinuePDF uses client-side processing instead. The code that performs the sign operation is downloaded to your browser and runs there, on your machine. Your PDF stays in local memory for the seconds it takes to produce signed PDF, then vanishes when you close the tab. We never receive the file, so there is nothing on our side to expose.
Why choose ContinuePDF
Never uploaded
Your document stays on your device from start to finish.
No server copy
Nothing to retain, leak, or hand over — we never hold your file.
Works offline
Once loaded, the tool runs with the network disconnected.
Auto-cleared
Closing the tab wipes the file from memory automatically.
Pro tip
Draw your signature slowly on a trackpad or touchscreen for a cleaner line, or upload a photo of your ink signature on white paper for the most authentic look. Size it to match the signature line rather than dropping it in oversized.
Frequently asked questions
Is a signature added this way legally valid?
In many places an electronic signature is acceptable for everyday agreements, but requirements vary by country and document type. For high-stakes legal documents, check what your jurisdiction or the other party requires.
Can I place the signature exactly where I want it?
Yes. You position and resize the signature freely, so you can drop it precisely on the signature line and add a date next to it if needed.
Is it safe to sign confidential PDFs here?
Yes — arguably safer than most alternatives. Because your PDF is processed in your browser and never uploaded, there is no server-side copy of your confidential document. You can even run the tool with your internet disconnected once the page has loaded.
Can ContinuePDF staff see my document?
No. The file never reaches us. All sign processing happens locally on your device, so we have no access to your document's contents at any point.
Is ContinuePDF free to use?
Yes. ContinuePDF and all of its tools, including Sign PDF, are free with no signup required. Because documents are processed in your browser rather than on our servers, we can offer the full feature set at no cost.
Other ways to Sign PDF
Prefer a different device, browser, or setup? Sign PDF works the same everywhere.
Ready to Sign PDF?
Start using our free sign tool now — no signup required.
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