Digitally sign documents. Locally. Securely.

SafeSign is a lightweight, cross-platform tool that lets you sign PDFs and legal documents with a cryptographic signature. No upload, no cloud, no risk.

Download App How it works

Offline & Secure

All operations happen locally. Your keys never leave your computer, and no files are uploaded anywhere.

Legally Binding

Supports standard-compliant digital signatures compatible with global contract laws.

Multi-platform

Available for Windows, macOS, and Linux with a unified user interface and installer.

How to Start

Download and install SafeSign for your OS.
Import or create a cryptographic key pair.
Open any PDF or TXT file and apply your signature.

Your signed documents remain local unless you choose to share them.

Command-line (Optional)

# Example: sign a PDF
safesign --input contract.pdf --sign --output signed.pdf

Ideal for developers or automation pipelines.

Frequently Asked Questions

Is my data ever sent to the cloud?

No. All data stays on your device. There’s no cloud backup or analytics.

Can I verify signatures?

Yes — SafeSign includes a verification tool for any signed document.

Is it free?

Yes. SafeSign is free and open-source. Donations welcome.