Sign PDF Online
Sign PDF online with ContinuePDF — no installer, no plug-in, no desktop software to keep updated. The whole tool loads as a web page, so you can sign your PDF straight from any computer or phone that has a browser. Because the work runs on your own machine instead of a remote server, you get desktop-class speed without the desktop-class download.
Start Sign PDF NowHow to Sign PDF Online
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Open the tool in your browser
Go to continuepdf.com and open Sign PDF. There is nothing to install — the page is the app.
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Add your PDF
Drag files onto the page or click to browse. Everything loads into the browser tab, not a server.
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Sign PDF and download
Run the tool and save signed PDF to your device. The result is generated locally and downloaded instantly.
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.
Why an online Sign PDF tool beats desktop software
Traditional PDF programs like Acrobat or dedicated sign utilities have to be downloaded, installed, licensed, and updated — and they only work on the one machine you installed them on. An online tool skips all of that: open a URL and you are working. That matters most on borrowed, locked-down, or brand-new computers where you can't install anything.
The usual trade-off with "online" tools is privacy, because most of them upload your document to a server to process it. ContinuePDF is different — the sign operation happens inside your browser using JavaScript and WebAssembly, so your PDF never leaves your device even though the tool lives on the web. You get the convenience of online with the privacy of offline.
Why choose ContinuePDF
Nothing to install
Works the moment the page loads — no setup, no admin rights.
Any device
Sign PDF from a laptop, desktop, tablet, or phone with the same link.
Always up to date
You always run the latest version — there is no old build to patch.
Processed locally
Online convenience, but files stay in your browser, not on a server.
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.
Do I need to install anything to sign a PDF online?
No. Sign PDF runs entirely as a web page. You open the link, add your PDF, and download signed PDF — there is no program to download, no extension to add, and no account to create.
Does an online tool mean my file is uploaded somewhere?
Not with ContinuePDF. Although the tool is delivered over the web, the actual processing runs inside your browser on your own device. Your document is never transmitted to or stored on our servers.
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.
Open Sign PDF Tool