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Token Generator

Generate random string with the chars you want, uppercase or lowercase letters, numbers and/or symbols.

Token Generator

Token Generator: Create Random Strings of Any Length

Generate random strings in the character set and length you choose — useful for test fixtures, placeholder IDs, sample values and temporary names. Generation happens entirely in your browser. Note that it uses JavaScript's Math.random(), which is not a cryptographically secure random number generator, so do not use the output for API keys, session IDs, CSRF tokens or anything else an attacker could profit from guessing.

How to Use

  1. Set the character set and length

    Turn uppercase, lowercase, digits and symbols on or off, then set the length between 1 and 512 characters.

  2. Generate a string

    Press generate, or change any setting, and the tool builds a new string from the characters you allowed.

  3. Copy it

    Copy the result to your clipboard with one click. Everything happens in your browser and nothing is sent anywhere.

Key Features

  • Customizable character sets (A-Z, a-z, 0-9, symbols)
  • Adjustable length (1-512 characters)
  • One-click copy
  • Runs entirely in your browser — the string is never uploaded
  • Regenerate instantly

Practical Applications

Good for:
  • Test fixtures and mock data
  • Placeholder IDs in development and staging
  • Sample values for demos and documentation
  • Random names for temporary files or buckets

Not for: API keys, session IDs, CSRF tokens, password reset links, or any secret a person could be harmed by someone guessing. See the note above on Math.random().

Technical Specifications

  • Randomness source: Math.random() — not a CSPRNG
  • Supported character types: Uppercase Lowercase Digits Symbols
  • Output length: 1-512 characters
  • Processing: entirely in the browser, no request leaves the page

Randomness and Limitations

This tool builds strings with JavaScript's Math.random(). That function is designed to be fast, not unpredictable, and it is not a cryptographically secure random number generator (CSPRNG). We make no FIPS, TRNG or entropy-compliance claim.

Do not use the output for API keys, session IDs, CSRF tokens, password reset links, or any other value where being guessed would matter. For those, use crypto.getRandomValues() or your platform's secrets service.

Generation happens in your browser and the result is never sent to us.

Frequently Asked Questions

Is the output safe to use as an API key or password?
No. The generator uses JavaScript's Math.random(), which is fast but not unpredictable, and it is not a cryptographically secure random number generator. Use crypto.getRandomValues() or your platform's secrets service for API keys, session IDs, CSRF tokens and password reset links.
What is it good for, then?
Test fixtures, mock data, placeholder identifiers in development and staging, sample values in documentation, and random names for temporary files or buckets — anything where an attacker guessing the value would not matter.
Why is the maximum length 512 characters?
It keeps the interface workable and the result easy to copy in one go. If you need a longer string, generate two and join them.
Can I share a configured generator with a colleague?
Yes. The settings are written into the page URL, so copying the address bar reproduces the same character set and length for whoever opens it.

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