Free Token Generator – Generate Secure API Keys & Secrets Online
Generate cryptographically secure tokens, API keys, and secrets for your applications. URL-safe, hexadecimal, base64 formats. Custom prefixes, entropy calculation, bulk generation. 100% free, browser-based, never stored.
What Is a Token Generator?
A token generator creates random strings used for authentication, authorization, and secure data exchange. These tokens serve as API keys, session identifiers, password reset links, and cryptographic secrets.
Why Use Random Tokens?
Security: Unpredictable tokens prevent brute-force attacks and unauthorized access.
Authentication: API keys identify and authenticate applications making requests.
Session Management: Session tokens maintain user state across requests.
Password Resets: Unique tokens enable secure password reset links.
CSRF Protection: Random tokens prevent cross-site request forgery attacks.
How to Use This Tool
Step 1: Configure Token Settings
- Type: Choose character set (URL-safe recommended)
- Length: Set token length (32+ for production)
- Count: How many tokens to generate
- Prefix: Optional prefix like
sk_live_
Step 2: Generate
Click the button to create cryptographically secure tokens using the Web Crypto API.
Step 3: Copy or Download
Copy individual tokens or download the full list.
Token Types Explained
| Type | Characters | Best For |
|---|---|---|
| URL-Safe Base64 | A-Z, a-z, 0-9, -, _ | API keys, URLs |
| Alphanumeric | A-Z, a-z, 0-9 | General purpose |
| Lowercase Alphanumeric | a-z, 0-9 | Case-insensitive systems |
| Hexadecimal | 0-9, a-f | Encryption keys, hashes |
| Standard Base64 | A-Z, a-z, 0-9, +, / | Binary encoding |
| With Symbols | Full printable ASCII | Maximum entropy |
Security Best Practices
Recommended Token Lengths
| Use Case | Minimum Length | Entropy |
|---|---|---|
| Session tokens | 32 characters | 192 bits |
| API keys | 32 characters | 192 bits |
| Password reset | 32 characters | 192 bits |
| Encryption keys | 64 characters | 384 bits |
| CSRF tokens | 24 characters | 144 bits |
Storage Guidelines
DO:
- ✅ Hash tokens before storing in databases
- ✅ Use environment variables for API keys
- ✅ Implement token expiration
- ✅ Use HTTPS for transmission
DON'T:
- ❌ Log tokens in plain text
- ❌ Store in version control
- ❌ Expose in client-side code
- ❌ Use predictable patterns
Understanding Entropy
Entropy measures unpredictability:
Entropy = Length × log₂(CharacterSetSize)
Example (32-char URL-safe):
32 × log₂(64) = 32 × 6 = 192 bits
| Entropy | Security Level |
|---|---|
| 256+ bits | Very Strong (recommended) |
| 128+ bits | Strong |
| 64+ bits | Moderate |
| <64 bits | Weak |
Common Token Formats
Stripe-Style API Keys
sk_live_Ab7xKz9Lm2Np4Qr8St5Uv1Wx
pk_test_Cd3Ef6Gh9Ij2Kl5Mn8Op1Qr
JWT-Compatible Secrets
kT9vN2xR5mP8qS1wE4yU7aB3cD6fG0hJ
Session Tokens
sess_8f7e6d5c4b3a2190fedcba0987654321
Frequently Asked Questions
Are these tokens truly random?
Yes. This tool uses the Web Crypto API (crypto.getRandomValues()), which provides cryptographically secure random numbers.
Is my token saved anywhere?
No. All generation happens in your browser. Tokens are never transmitted to any server.
What length should I use?
For production systems, use at least 32 characters (192+ bits of entropy). 64 characters provides maximum security.
Can I use custom prefixes?
Yes! Add prefixes like sk_live_, api_, or token_ to identify token types.
How do I store tokens securely?
Hash tokens using bcrypt or Argon2 before storing. Only compare hashes, never store plain text.
Related Tools
- UUID Generator — Generate UUIDs
- Password Generator — Strong passwords
- Random String Generator — Custom strings
- Hash Generator — Create hashes
Configure your token settings above and click Generate to create secure tokens instantly.