Random String Generator

Developer

Generate secure random strings for free in your browser: choose uppercase, lowercase, digits, symbols and a length up to 128 characters, then copy it.

Character types

Uses crypto.getRandomValues with unbiased sampling. Everything runs locally in your browser.

What is a Random String Generator?

A Random String Generator instantly produces random text from the character types you enable: uppercase, lowercase, digits and symbols. It uses the browser crypto.getRandomValues API with unbiased sampling, so results suit tokens, salts, one-time codes and test data.

What can you configure?

  • Uppercase (A–Z): capital letters.
  • Lowercase (a–z): lower-case letters.
  • Digits (0–9): numbers.
  • Symbols (!@#$…): punctuation and special characters.
  • Length: any value from 1 to 128 characters; you can regenerate as many times as you like.

What to use random strings for

  • Password salts and reset tokens that must never repeat.
  • Temporary identifiers for test data and fixtures.
  • Example keys in documentation and demos.
  • Unique name suffixes when copy-pasting between environments.

Length and entropy

Longer strings with a bigger alphabet give far more combinations. For security-critical values like salts or tokens, prefer 32+ characters from the full character set. For display or test purposes, shorter strings are fine and easier to type.

How to use Random String Generator

Create strong random strings in seconds with exactly the characters and length you need.

Use the controls above to provide your input or choose options, then review the result on the page.

Why use our Random String Generator

  • Generate secure random strings with the character sets and length you choose, powered by crypto-grade randomness.
  • Complete the task with a focused Random String Generator workflow instead of switching between apps.
  • Open it in your browser and get started—no account or installation required.

Frequently Asked Questions

  • Is it really random?

    Yes — values come from crypto.getRandomValues, a cryptographic-quality source; every generation is fresh and independent.

  • Can the same string appear twice?

    Randomness means a repeat is technically possible, but with long strings the chance is astronomically small.

  • Is the result stored or uploaded?

    No — generation happens locally in your browser and nothing is sent to any server.

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