Sign PDF Locally

📁 Files & PDF

Draw or upload your signature and stamp it directly onto PDF documents client-side with 100% data privacy.

⭐ 4.9/5 (163 votes)

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Frequently Asked Questions

Quick answers about controls, features, accuracy, and local browser saving.

How does client-side PDF signing work without uploading documents?

Your PDF and signature are combined locally using pdf-lib inside your browser's memory. The signature is rendered onto an offscreen canvas, converted to a transparent PNG stream, and embedded directly onto the target page coordinates. Your sensitive PDF never leaves your device.

Can I draw or upload an existing signature image?

Yes! You can draw directly using your mouse, trackpad, or touchscreen stylus, or upload a pre-made signature image file (transparent PNG or JPEG).

Can I choose which page and position to place my signature on?

Yes. You can select any target page in multi-page documents and choose preset positions (Bottom Right, Bottom Left, Center) or fine-tune the signature size.

Is this signed PDF legally binding?

This tool provides a standard electronic signature (e-signature / image stamp) suitable for agreements, invoices, school forms, and permission slips. For regulated cryptographic digital certificates (eIDAS / PKI with smartcards), dedicated certificate software is used.

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