Add secure digital signatures to your contracts
Draw or upload your signature and apply it to your PDF pages entirely within your browser.
Upload Document to Sign
Your signature and data never leave your device.
Sign documents without sharing your signature
Why Add secure digital signatures to your contracts with OncePDF?
Let’s face it, printing out a document just to scribble your name on it, scan it back into your computer, and email it off is incredibly frustrating. It feels like we are living in the past! But the real highlight of the modern digital era is that you don't have to jump through those hoops anymore. Signing a PDF electronically is supposed to be fast, seamless, and entirely painless.
The problem? Many e-signature platforms force you to upload your private contracts, lease agreements, and tax forms to their remote servers. You’re practically handing over your most sensitive information just to draw your name. We think there is a much better way to handle this. With OncePDF, you can sign your documents locally, right inside your own browser. Your signature and your data never actually leave your device.
How to e-sign your documents
We've designed this process to be as intuitive as picking up a pen. Just follow these quick steps:
- Upload your file: Drag your PDF onto the drop zone or click the button to grab it from your folders.
- Draw your signature: Click "Add Signature" to open the drawing pad. Use your mouse or touchscreen to sign your name.
- Add text or dates: Need to fill in your name or today's date? Pop in a text box and drag it wherever it needs to go.
- Finalize and download: Once everything looks perfect, click finalize. Your browser will instantly generate the signed document for you to save.
Complete privacy by design
Security shouldn't be an afterthought. Just looking at how often data breaches happen these days makes you realize how important it is to keep your files close. That’s why we built this tool using advanced HTML5 and WebAssembly technologies.
When you upload your PDF to sign it, it doesn't go to a cloud server in another country. It stays in your computer’s memory. The rendering, the signature placement, and the final document generation all happen locally. You've got this peace of mind knowing no one else is peeking at your contracts.
Why our local signing tool stands out
It's the kind of utility that just works, without the bloat or privacy concerns of enterprise software.
Smooth Drawing
Our signature pad captures your strokes smoothly, making your digital signature look just like the real thing.
Drag & Drop Placement
Easily move your signature, dates, and custom text fields around the page to get the alignment exactly right.
Instant Processing
No waiting for a server to process your request. The moment you click finalize, your signed document is ready.
Take Control of Your Paperwork
Handling digital paperwork shouldn't give you a headache. Whether you are an independent freelancer signing a new client agreement, or a parent signing a school permission slip, you need a tool that is reliable, fast, and secure. We strip away the unnecessary accounts and subscriptions, giving you a straightforward canvas to get the job done. Because everything is handled locally on your machine, you never have to worry about your personal signature being stored in a database somewhere.
Looking to do more with your freshly signed document? Once you've added your signature, you might want to add a layer of encryption before emailing it to a third party. You can easily do this by using our Secure PDF Protector to lock it with a password. Alternatively, if your final file turned out a bit too large to send as an email attachment, our Local PDF Compressor will shrink it down without losing the crisp quality of your newly placed signature.
It really is that simple. You've got this entire suite of tools ready to streamline your workflow directly from your web browser. No installations, no hidden fees, just pure productivity.