Electronic Signer

Easily apply a simple electronic signature used for personal consent or approval.

Zero-server processing. Your document never leaves your device.

Select PDF to Sign

or drag and drop here

Note: This tool applies a simple signature (an image of your signature) onto the document. It is suitable for personal consent or general approval. It is not a cryptographically secure digital signature.

100% Privacy Guaranteed

Your files never leave your device. Processed locally.

Verify our security

How to Sign PDF in 4 Steps

1Upload your PDF.
2Customize the tool settings.
3Click the action button.
4Download your file.

Pro Tip:

Process your documents in 100% privacy without expensive subscriptions or server uploads.

Privacy & Compliance

LumioPDF operates with zero-trust architecture. Your files are processed entirely in your browser's RAM using WebAssembly. We never upload, store, or see your data. Our site is a static export, meaning we don't even have a backend database to store files if we wanted to.

Designed for high-security environments. Since no data ever leaves your device, LumioPDF helps you maintain GDPR alignment and satisfies internal data governance requirements for legal and medical professionals.

Related Guides

Check out our Resources Hub for more detailed PDF tutorials and security breakdowns.

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