Sign PDF Documents
Online Free

Is Quick PDF Sign really free?

Yes, completely free. No account, no subscription, no credit card. Sign unlimited PDFs at no cost, forever.

Do my files get uploaded to a server?

No. All PDF processing happens entirely in your browser using client-side JavaScript. Your files never leave your device. We have no server that receives your documents.

Is my electronic signature legally binding?

In many countries, including the US (under ESIGN Act and UETA) and EU (under eIDAS), electronic signatures are legally valid for most documents. However, some documents require a wet or notarized signature. Consult a legal professional for specific requirements.

What PDF file size is supported?

Since processing happens in your browser, file size is limited by your device's memory. Most modern devices handle PDFs up to 100MB without issues.

Can I sign on my phone?

Yes. Quick PDF Sign is fully optimized for mobile — iPhone, Android, and tablets. The drawing tool supports touch input with smooth stroke rendering.

How do I draw my signature?

Click 'Sign PDF', then choose 'Draw'. Use your mouse on desktop or your finger on mobile to draw your signature. You can undo, clear, and redraw until it looks right.

Can I type my signature instead?

Yes. Choose the 'Type' method and enter your name. Pick from several handwritten-style fonts and adjust the size.

Can I upload a signature image?

Yes. Upload a PNG image of your signature. Transparent backgrounds are supported. You can crop and resize after uploading.

Can I sign multiple pages?

Yes. Use the page navigator to move between pages and place signatures on any page of your PDF.

Can I place multiple signatures?

Yes. Add as many signature fields as you need. Each can be moved, resized, rotated, or deleted independently.

Are my signatures saved?

Your signature presets are saved locally in your browser's storage. They never leave your device and are available the next time you visit.

Can I use this for business documents?

Yes. You can also upload company stamps or logos as image signatures. This is useful for invoices, contracts, and other professional documents.

What browsers are supported?

Quick PDF Sign works in all modern browsers: Chrome, Safari, Firefox, and Edge.

Can I fill in PDF form fields too?

Currently the tool focuses on signature placement. Full form filling is on our roadmap.

Does this work offline?

The page needs to load once, after which the PDF processing works entirely offline since everything runs in your browser.

How do I delete a signature I placed?

Click on any placed signature to select it, then press the Delete key, or click the trash icon in the toolbar.

Can I undo changes?

Yes. Press Ctrl+Z (or Cmd+Z on Mac) to undo the last action. You can also undo while drawing a signature.

How do I download the signed PDF?

Once you've placed all signatures, click 'Download Signed PDF'. The file is generated in your browser and downloaded immediately.

Is there a dark mode?

Yes. Click the moon icon in the navigation to switch to dark mode. Your preference is remembered for future visits.

Do you store any data about me?

No. We don't collect personal data, don't use analytics that track you, and don't require any account. Your signed PDF and signature data never reach our servers.

What's the difference between an electronic signature and a digital signature?

An electronic signature is any electronic indication of intent — such as a drawn or typed signature. A digital signature is a cryptographic mechanism providing stronger verification. Quick PDF Sign provides electronic signatures.

Is Quick PDF Sign open source?

We're evaluating open-sourcing the client-side signing engine. Check back for updates.

Sign PDF Online Free — Everything You Need to Know