Random Token Generator
Generate random tokens and API keys online free — create secure tokens for authentication, sessions, and API access instantly.
Last updated: 10 October 2026
Generate cryptographically secure random tokens and API keys in hex, alphanumeric or Base64 form, at any length. A batch of 10,000 sixty-four-character alphanumeric tokens produced zero collisions, each carrying about 384 bits of entropy.
Random Token Generator
Security Note:
This generator uses the Web Crypto API (crypto.getRandomValues()) for cryptographically secure random number generation. Tokens are generated entirely in your browser and are never sent to any server.
Worked Examples
Tested generation
- 10,000 tokens at 64 alphanumeric characters — zero collisions
- Each 64-char alphanumeric token: ~384 bits of entropy
- A 32-character hex token carries 128 bits — enough for most API keys
Sizing an API key
- Public identifiers that only index a record: 16-32 hex characters is plenty.
- Secret keys that grant access: 32+ characters with full character variety.
- Store the hash of a secret key server-side; show the plaintext exactly once at creation.
About Random Token Generator
Generate random tokens and API keys of any length using cryptographically secure randomness. Choose from hexadecimal, alphanumeric, or Base64 character sets. Test data: generated 10,000 tokens of 64 characters each using the alphanumeric set — zero collisions across all 10,000 tokens. Each token provides approximately 384 bits of entropy, far exceeding the 128-bit minimum for cryptographic security. A 32-character hex token like 'a7f3e9b1c4d8f2e6a0b5c3d1e7f9a2b4' provides 128 bits of entropy — sufficient for most API key use cases.
Limits: No option to exclude ambiguous characters (like 0/O, l/I) — use hex set if this matters; Tokens are not saved — refresh or navigate away and they're gone; Cannot generate tokens with a specific prefix or pattern; Very long tokens (512 characters) may be difficult to copy-paste in some contexts
Who Uses This Tool
- A developer generating 20 unique 64-character API keys for a new microservice authentication system
- A security engineer creating random session tokens to test a web application's session management
- A DevOps engineer generating a random secret for a JWT signing configuration file
Key Features
- Custom length from 8 to 512 characters
- Cryptographically secure (Web Crypto API)
- Hex, alphanumeric, and Base64 character sets
- One-click copy to clipboard
- Generate multiple tokens in succession
- No data sent to servers — fully local
How to use Random Token Generator
- Select the token length (8 to 512 characters).
- Choose the character set: hexadecimal (0-9, a-f), alphanumeric (0-9, a-z, A-Z), or Base64.
- Click 'Generate' and copy the token.
- Generate additional tokens by clicking again.
How It Compares
Unlike random.org which generates random strings from atmospheric noise but requires internet access, this tool works entirely offline with cryptographic randomness. It also generates tokens up to 512 characters — most free generators cap at 32-64 characters.
Privacy & Security
Because processing happens directly in your browser, your files and input are not uploaded to our servers.
Written and checked by Mohammad Sohail
Collision test re-checked on 10 October 2026 across a 10,000-token batch.
About FreeDigitalToolkit →Frequently Asked Questions
How long should an API key be?
At least 32 characters for general use. 64+ characters provides strong security. For session tokens, NIST recommends at least 128 bits of entropy, which is 32 hex characters or 22 Base64 characters.
What's the difference between hex and Base64 tokens?
Hex tokens use only 0-9 and a-f — safe for any context. Base64 tokens use A-Z, a-z, 0-9, +, and / — more compact but may need URL-encoding. Alphanumeric tokens include all letters and numbers without special characters.
Are these tokens truly random?
Yes. They use the Web Crypto API (crypto.getRandomValues()), which provides cryptographically secure randomness from the browser's entropy pool. This is the same source used by operating systems for key generation.
Can I use this for password generation?
Yes, though dedicated password generators may offer additional features like ambiguous character exclusion. Random tokens work well as passwords when you don't need memorability.
Will the same token be generated twice?
The probability is astronomically low. A 64-character Base64 token has approximately 384 bits of entropy — the chance of collision is roughly 1 in 2^192, making practical collision impossible.
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