PDF SECURITY
Free Sign PDF online
Draw your signature on a PDF.
Use Sign PDF to draw your signature on a PDF in seconds, straight from your browser. Add your PDF, adjust the Sign PDF options if you need to, then download the result immediately. Sign PDF processes everything in your own browser, so your data never leaves your device.
- Free to use
- No signup
- No uploads
- Works offline
Why use Sign PDF
- draw your signature on a PDF without installing software
- Your PDF is processed on your device by Sign PDF, never uploaded
- Sign PDF needs no account, email address or payment details
- Sign PDF is batch-friendly: reuse it immediately on the next file
- Sign PDF is keyboard accessible and screen-reader friendly
- Sign PDF is free forever, with no watermark on the result
Sign PDF runs entirely inside your browser. Your PDF is never uploaded, stored or shared, and nothing is retained once you close the tab.
How to use Sign PDF
- Add your PDF Drag your PDF onto the drop zone or pick it from your device.
- Adjust the options Set the options that control how Sign PDF handles your input.
- Apply the change Sign PDF works instantly on your device, with no queue and no upload wait.
- Download the result Save the finished file straight to your device, then reuse the tool as often as you like.
Benefits
Private by design
Your PDF stays on your device while Sign PDF works. Sign PDF never sends it to a server, so confidential work stays confidential.
Instant results
There is no upload step, so Sign PDF starts the moment you add your PDF.
No signup, no limits
Use Sign PDF as many times as you want. Sign PDF asks for no account, adds no watermark and keeps no paid tier gating the output.
Works offline
Once the page has loaded, Sign PDF keeps working without a connection, which helps on flights and locked-down networks.
Who it is for
For legal and finance teams
Legal and finance teams use Sign PDF to handle sensitive documents without installing software: draw your signature on a PDF on a shared or locked-down machine.
For HR and admin teams
Sign PDF helps HR and admin teams process paperwork quickly, since your PDF never leaves the laptop it was created on.
For freelancers
Sign PDF helps freelancers send client deliverables quickly, since your PDF never leaves the laptop it was created on.
How it works
Sign PDF loads your PDF into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of Sign PDF happens inside your browser sandbox.
Frequently asked questions
Is Sign PDF free to use?
Yes. Sign PDF is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does Sign PDF upload your PDF to a server?
No. Sign PDF processes your PDF inside your browser, so it never reaches a DocTools server. That also means the tool keeps working if your connection drops mid-task.
Is there a file size limit?
The practical ceiling is your device's available memory rather than a server quota. Files up to roughly 100 MB work comfortably on a typical laptop in Sign PDF.
Do I need to install anything to use Sign PDF?
No installation is needed. Sign PDF runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use Sign PDF on a phone or tablet?
Yes. The Sign PDF interface adapts to small screens and supports touch input, though very large jobs are faster on a desktop browser.
What happens to your PDF when I close the tab?
It is discarded. Sign PDF keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
Related tools
- Digital Signature Validator | Verify digital signatures in PDFs
- Merge PDF | Combine multiple PDFs into one document
- Split PDF | Separate a PDF into individual pages
Last updated: 2026-09-07