Signerra
100% Free, Client-Side & Private

Sign PDF online, free and private

Signerra lets you sign any PDF online, for free, with zero file uploads. Everything runs in your browser: your document never touches a server.

How to sign a PDF online (3 steps)

No account. No waiting. Three steps and you're done.

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1. Upload your PDF

Drag and drop your PDF onto the tool, or click to browse your files. It opens instantly in your browser: nothing is sent to any server at this point, or ever.

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2. Create your signature

Draw, type, or upload your signature image. Then click anywhere on the document to place it exactly where you need it. Resize and reposition freely.

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3. Download your signed PDF

Hit download and you're done. The entire signing process happens on your device. The output file goes straight to your downloads folder: clean, watermark-free, and private.

Ways to add your signature

All three methods are completely free. Nothing is uploaded, regardless of which one you choose.

Draw your signature

Use your mouse, trackpad, or finger on a touchscreen to draw your signature freehand. It's the closest thing to signing with a pen. Works on desktop and mobile.

Type your signature

Type your name and pick a style. Fast, clean, and ideal when you're on a keyboard. Great for contracts and forms where a handwritten look isn't required.

Upload a signature image

Already have a PNG or JPG of your signature? Upload it directly. Transparent backgrounds work best. Your image is processed locally: it never leaves your device.

Why sign PDF with Signerra?

No file uploads: 100% private

Most online PDF tools upload your file to a remote server. Signerra doesn't. All processing runs client-side, powered by WebAssembly directly in your browser tab. Your lease, NDA, or contract never touches our infrastructure: because it's architecturally impossible for it to. We don't "delete files after one hour." We never receive them in the first place.

Free forever, no account needed

No trial period. No freemium paywall. No "download your file for $12/month" surprise. Signerra is free forever: unlimited documents, no watermarks, no sign-up required. Open the tool, sign your PDF, download it. That's it.

Works on any device, any browser

Chrome, Firefox, Safari, Edge: Signerra works in all modern browsers. Desktop, laptop, tablet, phone. No app to install, no extension to add. If your browser supports WebAssembly (and virtually all of them do in 2025), you're good to go.

Frequently Asked Questions

Is it safe to sign a PDF online?

With Signerra, yes: completely. Your file never leaves your device. There's no server to breach, no database storing your documents. The risk that comes with uploading sensitive files simply doesn't exist here.

Can I sign a PDF online for free?

Yes. Signerra is 100% free with no hidden fees, no usage limits, and no watermarks on your output. You don't need a credit card or an account.

Does signing a PDF online require an account?

Not with Signerra. Open the tool, sign your PDF, download it. No email address, no password, no sign-up of any kind.

What is the best free PDF signer with no upload?

Signerra is built specifically for this. It's a free PDF signer with no server upload: everything runs in your browser via WebAssembly. If privacy is your priority (think NDAs, leases, medical forms), it's the right tool.

Ready to sign? Drop your PDF into the tool above: it takes under a minute, and your document stays yours the whole time.

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