Random String Generator

The Random String Generator produces random strings from a secure source in several character sets — alphabetic, numeric, alphanumeric, hex, Base64, or your own set — at any length. It is for developers needing identifiers, test data, or placeholder keys.

Hand-typed “random” strings are predictable. Generating them from the browser’s secure random source gives genuine randomness, locally, with no network call.

1. Choose a character set, or define your own.
2. Set the length you need.
3. Generate the string from the secure random source.
4. Generate more if you need several.
5. Copy the result into your code or data.

• Alphabetic, numeric, alphanumeric, hex, and Base64 sets
• Custom character-set option
• Any length
• Secure random source

• Creating test identifiers or sample data
• Generating a placeholder key during development
• Producing random codes for a prototype
• Filling a field that needs an arbitrary string

• Choose a length and character set that give plenty of unpredictability for the purpose.
• For secrets, store the generated string in a manager rather than reusing it from memory.
• Use hex or Base64 when the destination expects those specific alphabets.

• Using a generated string as a password without storing it safely in a manager.
• Picking too short a length, which weakens uniqueness and unpredictability.
• Restricting to a tiny character set when the use case allows a larger one.