Token Generator

What is Token Generator?

Token Generator creates cryptographically secure random tokens for authentication, API keys, session identifiers, and CSRF protection. It supports multiple output formats including hex, Base64, Base64URL (URL-safe), UUID v4, and custom alphabets. The tool uses the Web Crypto API's getRandomValues() for entropy and calculates the entropy bits for each generated token to verify it meets security requirements (128+ bits for session tokens per OWASP recommendations).

Backend developers implementing authentication systems, security engineers generating secret keys, and DevOps engineers configuring API credentials. The tool runs entirely in your browser — your data never leaves your device.

How to Use Token Generator

1. Select the token format — hex, Base64, Base64URL, UUID v4, or custom alphabet
2. Set the desired length or entropy level in bits
3. Generate one or multiple tokens and review the entropy calculation
4. Copy the token for use in your application configuration or code

Common Use Cases

• Generating secure API keys for service-to-service authentication
• Creating session tokens with sufficient entropy for web application security
• Producing CSRF tokens for form protection in web applications
• Generating password reset tokens with appropriate entropy and uniqueness

Pro Tips

• OWASP recommends at least 128 bits of entropy for session identifiers — a 32-character hex string provides exactly 128 bits (4 bits per hex character), while a 22-character Base64 string provides about 132 bits (6 bits per character)
• Base64URL encoding (replacing + with - and / with _) is essential for tokens used in URLs — standard Base64 characters + and / have special meaning in URLs and will break if not percent-encoded
• Never use Math.random() or non-cryptographic RNGs for security tokens — they are predictable with enough samples; the Web Crypto API (crypto.getRandomValues) is the only browser-native CSPRNG suitable for security purposes

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: CSPRNG, Entropy, OWASP guidelines, UUID v4.

Frequently Asked Questions