Sign PDF
Drop in a signature or stamp image and drag it exactly where you want. Everything stays on your device.
Drop a PDF here
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About this tool
Sign a PDF for Free
Place your signature or stamp on any page of a PDF - no account, no subscription.
Draw, type, or upload your signature image and position it exactly where you need it.
Sign PDF on iPhone
Use the sign pdf tool directly in your iPhone browser - no app to install, no storage wasted.
Everything runs locally on your iPhone. Your files stay on your device at all times.
Sign PDF on Android
Use the sign pdf tool directly in your Android browser - no app to install, no storage wasted.
Everything runs locally on your Android. Your files stay on your device at all times.
Frequently asked questions
Is this legally binding?
Electronic signatures are legally recognized in most jurisdictions under laws like ESIGN (US) and eIDAS (EU).
Is it private?
Everything runs locally in your browser using WebAssembly. Because no data is uploaded to a cloud server, your files remain strictly private, and the entire process generates zero server carbon emissions, making it highly eco-friendly.
Does this work on iPhone?
Yes - KuroPDF works in any modern browser on iPhone. No app download required.
Does this work on Android?
Yes - KuroPDF works in any modern browser on Android. No app download required.
Does this work on Mac?
Yes - KuroPDF works in any modern browser on Mac. No app download required.
Does this work on Chromebook?
Yes - KuroPDF works in any modern browser on Chromebook. No app download required.
Does this work on iPad?
Yes - KuroPDF works in any modern browser on iPad. No app download required.
Does this work on Windows?
Yes - KuroPDF works in any modern browser on Windows. No app download required.
How do I sign a PDF?
Open the tool, drop your file, adjust any settings, and click the action button. The result downloads to your device instantly.
Do I need to create an account?
No - KuroPDF is completely free with no sign-up required.
Are my files uploaded?
Everything runs locally in your browser using WebAssembly. Because no data is uploaded to a cloud server, your files remain strictly private, and the entire process generates zero server carbon emissions, making it highly eco-friendly.