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LLM Secrets - Protect .env Secrets from Claude Code

LLM Secrets is a free, open-source tool that prevents AI coding assistants like Claude Code from reading secrets in your .env files. It protects private keys, API keys, and crypto wallet credentials in an encrypted vault, unlockable via phone, laptop, or security key.

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About this tool

LLM Secrets helps developers keep sensitive information away from AI coding assistants. It creates an encrypted vault to store .env secrets, private keys, and API keys, ensuring they are never exposed to AI. Key features include: - Support for macOS, Linux, and WSL (Windows Subsystem for Linux) - Zero secrets exposed to AI - Visual secret editor: add, edit, and organize secrets with a clean interface, or drive everything from the command line - Auto-updated documentation: add a secret and regenerate CLAUDE.md so your AI always has the latest reference - Master key backup: use scrt4 backup-key --save ~/usb to write a password-protected file, keep it in a password manager or on a USB stick The tool is free to use and available on Android, iOS, Linux, macOS, and Windows. It is designed for security-conscious developers and users of AI coding assistants.

Best for
  • Developers using AI coding assistants like Claude Code
  • Security-conscious developers who need to protect .env files, API keys, and private keys
  • Developers who prefer managing secrets via CLI or a visual interface
Use cases
  • Prevent Claude Code from reading .env secrets
  • Store API keys and private keys in an encrypted vault
  • Manage secrets via CLI or visual editor
  • Keep AI documentation updated with regenerated CLAUDE.md
Strengths
  • Free to use with no paywall
  • Open-source and auditable
  • Public API available
  • Multi-platform support (macOS, Linux, WSL)
  • Low learning curve
Limitations
  • Official pages do not disclose whether there are usage limits or quotas for the free tier

Features & use cases

macOS, Linux & WSL supportZero secrets exposed to AIVisual secret editorAuto-updated documentation (regenerate CLAUDE.md)Master key backup

At a glance

Monetization
  • Free
Maturity signals
  • Open source
  • Public API
Learning curve
  • Low

Sources

Every profile keeps its sources and latest verification date.

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