Environment Secrets Generator (.env Values)

Environment Secrets Generator

Generate cryptographically secure environment variable values for your .env files. Create JWT secrets, database passwords, API keys, session secrets, and more — all using crypto.getRandomValues() for true randomness. Nothing is sent to any server; everything runs in your browser.

使い方

Click preset buttons to add common environment variables (JWT_SECRET, DATABASE_PASSWORD, API_KEY, etc.) or add custom variables with your own names. Choose the encoding type (hex, base64, alphanumeric, or alphanumeric with symbols) and length for each variable. Values generate automatically. Copy individual values or the entire .env block with one click. Regenerate individual values or all at once.

特徴

• クイックプリセット — One-click buttons for JWT_SECRET, DATABASE_PASSWORD, API_KEY, SESSION_SECRET, WEBHOOK_SECRET, ENCRYPTION_KEY, and APP_SECRET with recommended encoding and length defaults.
• Cryptographic Randomness — All values generated using crypto.getRandomValues(), the Web Cryptography API. No pseudo-random shortcuts. Suitable for production use.
• Multiple Encodings — Choose hex, base64, alphanumeric, or alphanumeric+symbols per variable. Base64 values are generated from random bytes then encoded (not random character picking).
• Strength Indicators — Per-variable entropy calculation showing bits of entropy, visual strength bar, and estimated crack time.
• Custom Variables — Add any variable name with custom encoding and length. Build your complete .env file in one place.
• .env Block Output — Full formatted output ready to paste into your .env file. Optional comments above each variable describing the type and encoding.
• ワンクリックコピー — Copy individual values or the entire .env block to clipboard instantly.
• Regenerate Controls — Regenerate individual values or all values at once without changing your variable configuration.
• 100% クライアントサイド — Nothing leaves your browser. No server requests, no logging, no tracking. Your secrets stay secret.