How to sign PDF
- Add your PDF. Drop the file on the page or tap to choose a file from your device.
- Adjust and preview. Change the settings and watch the live preview update instantly.
- Download. Tap the button to apply and save your new file — or continue with another tool.
PrivateFiles are processed in your browser and never uploaded.
Free, no limitsNo sign-up, no daily cap and no watermark.
Works everywherePhone, tablet or computer — any modern browser.
FastNo waiting for uploads or queues.
Frequently asked questions
Is my signature stored?
No. Your signature exists only in this browser tab and is gone when you close it.
Is Sign PDF free and safe?
Yes. Sign PDF is completely free, and because it runs inside your browser, your documents never leave your device.
Does it work on iPhone and Android?
Yes. Open this page in Safari, Chrome or any modern mobile browser, choose your file and download the result.