API keys, session tokens, email verification links, and CSRF tokens all share one requirement: they must be unpredictable. Using Math.random() or timestamps creates guessable tokens that attackers can enumerate. Cryptographic random generation makes brute-force attacks computationally infeasible.
What Is Token Generator?
Secure token generation uses a cryptographically secure pseudo-random number generator (CSPRNG) to produce unpredictable byte sequences. Our Token Generator creates tokens in hex, base64, and URL-safe formats with configurable length.
How to Use Token Generator on DevToolHub
- Open the Token Generator tool on DevToolHub — no signup required.
- Paste or enter your input data in the left panel.
- See the result instantly in the output panel.
- Copy the result or download it as a file.
Token Formats for Different Uses
Choose the right format for each use case:
// Hex tokens (common for API keys)
a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6
// Base64 tokens (compact, more entropy per character)
obPE1fX2p7jJ0OHyozTE1g==
// URL-safe tokens (for verification links)
obPE1fX2p7jJ0OHyozTE1g
https://app.com/verify?token=obPE1fX2p7jJ0OHyozTE1g
// Recommended minimum lengths:
API key: 32 bytes (256 bits)
Session ID: 16 bytes (128 bits)
CSRF token: 16 bytes (128 bits)Pro Tips
- Use at least 128 bits (16 bytes) of entropy for security tokens
- Never use Math.random() for tokens — it's not cryptographically secure
- Store API keys hashed (SHA-256) in your database — if the DB is breached, keys aren't exposed
- Add expiration timestamps to tokens — verification links shouldn't work forever
When You Need This
- Generating API keys for developer platforms
- Creating email verification and password reset links
- Building CSRF protection tokens for form submissions
- Generating invite codes and one-time-use tokens
Free Tools Mentioned in This Article