Token Generator

Free online tool. All processing is client-side. No signup needed.

How to Use the Token Generator

1. Enter your input values above
2. Results update automatically
3. Copy or download the output

What is a Token Generator?

A Token Generator creates cryptographically secure random tokens for API keys, session identifiers, CSRF tokens, password reset links, and other security-sensitive identifiers. Unlike UUIDs (which follow a specific format), tokens are fully random strings of configurable length and character set — you specify exactly what characters to use (alphanumeric, hex, Base64, custom) and how long. In 2026, with APIs becoming the backbone of all software, secure token generation is a daily need for developers building authentication and authorization systems.

How Does It Work?

Select token characteristics: length (32, 64, 128, 256 characters — or custom), character set (alphanumeric, hex, Base64, Base62 URL-safe, or custom alphabet), and quantity (1-50 tokens). The generator uses the Web Crypto API's cryptographically secure random number generator (Crypto.getRandomValues()) — NOT Math.random(), which is not cryptographically secure. Results show the entropy (in bits) of each token: Entropy = log₂(alphabet_size^length).

Formula

Token Entropy (bits) = Length × log₂(Alphabet Size)\n\nCharacter Sets:\n• Hex (0-9, A-F): 4 bits/char, 64 chars → 256 bits\n• Alphanumeric (0-9, A-Z, a-Z): 5.95 bits/char, 43 chars → 256 bits\n• Base64 URL-safe: 6 bits/char, 43 chars → 258 bits\n• Full ASCII printable (95 chars): 6.57 bits/char, 39 chars → 256 bits\n\nSecurity Recommendations:\n• API Key: ≥128 bits (22 hex, 22 alnum, 22 b64 chars)\n• Session ID: ≥128 bits\n• CSRF Token: ≥64 bits\n• Password Reset Token: ≥128 bits\n• OAuth state param: ≥128 bits\n\nRandomness: window.crypto.getRandomValues() (CSPRNG, not Math.random())

Who Uses This Tool?

• Backend developers generating API keys for service authentication
• Web developers creating session IDs and CSRF anti-forgery tokens
• Security engineers generating password reset tokens and email verification codes
• Microservice architects creating service-to-service authentication tokens
• Google OAuth state parameters and other protocol-specific token requirements

Pro Tips

• Always use cryptographically secure randomness (Web Crypto API, /dev/urandom, os.urandom) for security tokens — NEVER use Math.random() or current time as token sources
• API key length: Stripe uses ~100-bit keys (sk_live_...), GitHub uses ~160-bit. 128-bit minimum for API keys, 256-bit for long-lived credentials
• Use URL-safe character sets for tokens that appear in URLs or email links. Base64 includes + and / which have special meaning in URLs
• Token hashing: store a SHA-256 hash of the token in your database, not the token itself. When the token is presented, hash and compare. This limits damage in case of database breach

Frequently Asked Questions about Token Generator

What's the difference between a token and a UUID?

UUIDs follow a specific format (8-4-4-4-12 with version/variant bits). Tokens are fully random with no structure — you control the length and character set. UUIDs are great for database IDs; tokens are better for security-sensitive identifiers where format predictability is undesirable.

How long should an API key be?

At least 128 bits of entropy. In practice: 32 hex chars (128 bits), 32 alphanumeric chars (190 bits), or 43 Base64 chars (258 bits). Popular services: Stripe ≈ 100 bits, GitHub ≈ 160 bits, AWS ≈ 256 bits. Longer keys are more secure but less convenient.

Free online Token Generator — no signup, 100% client-side processing. All data stays in your browser.