Your .env files.
Synced. Encrypted. Yours.
Zero-knowledge encryption powered by Rust. GUI and CLI. Recovery backed by the Bitcoin wallet standard. Built for developers managing dozens of API keys.
We can't see your keys. Period.
Encryption happens on your machine with your Master Key. We store an encrypted blob we cannot read. AES-256-GCM + Argon2id.
Team sharing. No auth server.
Invite tokens let team members access shared vaults. Encrypted with a passphrase — share via Slack, AirDrop, or in person.
CLI + GUI. CI/CD ready.
Desktop app and terminal CLI share the same Rust core. Service tokens enable non-interactive pulls in GitHub Actions.
100% Open Source. Every binary is public.
Every release is built on GitHub Actions — publicly. SHA-256 checksums let you verify your download matches the build log.
Built with Rust. Not Electron.
Tauri + Rust backend. Native macOS/Windows performance. No 150MB runtime. No Chromium process eating your RAM.
How It Works
Scan
Butler detects .env.* files and blocks SSH keys, certificates, and binary files automatically.
Encrypt
AES-256-GCM encrypts everything on your machine. Your Master Key never leaves.
Sync
Push to your Supabase, drop into Google Drive / iCloud / Dropbox, or export a portable .envbutler file. Your data, your choice.
Sync Your Way
No vendor lock-in. Pick the sync method that fits your workflow.
Cloud Database
Push encrypted blobs to your own Supabase instance. Full control, real-time sync across devices.
Folder-Based Sync
Point to any cloud-synced folder. Push writes encrypted files there — Google Drive, iCloud, or Dropbox handles the rest.
Portable File
Export a .envbutler file and move it however you want — USB, AirDrop, email. Import on any machine with one click.
Download Env Butler
Free and open-source. Verify every build on GitHub Actions.
# macOS
shasum -a 256 Env-Butler_*.dmg
# Windows (PowerShell)
Get-FileHash Env-Butler_*.exe -Algorithm SHA256
Compare with checksums.txt on the release page.
First Launch: Platform Guides
No paid certificate — we keep Env Butler free and open-source instead.