Secure Random Token Generator
Description
Generate cryptographically secure random tokens with custom length (1–512) and character sets. Ideal for API keys, session IDs, and passwords.
About Secure Random Token Generator
This tool generates random tokens entirely in your browser using window.crypto.getRandomValues, the cryptographically secure pseudo-random number generator (CSPRNG) built into the Web Crypto API. You control the length (1–512 characters) and the character set (uppercase, lowercase, digits, symbols), making it suitable for API keys, session identifiers, password reset tokens, or random passwords. Because generation is 100% client-side, no token ever leaves your device or touches a server.
How to use
- Set the desired token length using the length control.
- Toggle the character sets you want included: uppercase, lowercase, numbers, and symbols.
- Click Generate to produce a new token from the browser's CSPRNG.
- Copy the token and store it securely; regenerate at any time for a fresh value.
Examples
| Example | Input | Output |
|---|---|---|
| Alphanumeric API key (length 24) | Length: 24, sets: uppercase + lowercase + numbers | A random 24-character string such as: kQ7mZ2pX9bV4tR8nL6wC1jH3 |
Frequently asked questions
Are the tokens cryptographically secure?
Yes. They are produced with window.crypto.getRandomValues, a CSPRNG provided by the browser, rather than Math.random. This makes them appropriate for security-sensitive uses such as API keys and session IDs.
Is my token sent to a server?
No. Generation happens entirely in your browser. Nothing is uploaded, logged, or transmitted, so the token only exists on your device.
How long should my token be?
Longer tokens have more entropy and are harder to guess. For API keys and session IDs, 32 or more random characters from a large character set is a common, comfortable choice; increase the length and character variety for higher security.
Can I use this to create passwords?
Yes. Enable the character sets your target system allows and pick a sufficient length. Each generated value is independent and random, so it works well as a strong, unique password.