cadenas

cadenas (French for "padlock") encrypts and decrypts a file with a password, right in your browser. No file and no password is ever sent over the Internet: the page is technically not allowed to open any network connection (Content Security Policy connect-src 'none'), and it works offline once installed.

It uses Argon2id and XChaCha20-Poly1305, detects any change to an encrypted file, and can read and write the age format, so files stay readable with other tools. The same tool comes as a command line for Windows, macOS and Linux, a Docker image you can self-host, and a JavaScript library.

cadenas is free software (MIT) with a documented file format. It has not had an independent security audit yet; the threat model and format are public for review.

Project Samples

Encrypt a file with a password, right in your browser (light theme)

Same page in dark theme: nothing leaves your device

cadenas: free, open-source file encryption (Argon2id + XChaCha20-Poly1305, age-compatible)

Project Activity

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License

MIT License

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Additional Project Details

Operating Systems

Linux, Mac, Windows

Languages

English, French

Intended Audience

Developers, End Users/Desktop

User Interface

Command-line, Web-based

Programming Language

JavaScript

Related Categories

JavaScript Cryptography Software, JavaScript Encryption Software

Registered

2 hours ago

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