Random String Generator

Generate custom random strings with your chosen character sets

Character Types

Output

Generated strings will appear here…

Common Use Cases

API Keys

Generate random tokens for API authentication and secret keys.

Test Data

Quickly create random strings for database seeding or unit tests.

Nonces & Tokens

Generate one-time-use strings for CSRF protection and session IDs.

How to Use

  1. 1Set the desired string length (1 to 256 characters).
  2. 2Enter how many strings you need (1 to 100).
  3. 3Select the character types to include in the strings.
  4. 4Click Generate — strings are created instantly in your browser.
  5. 5Copy individual strings or use Copy All. Download saves them as random-strings.txt.

Frequently Asked Questions

Random strings are commonly used for: API keys, session tokens, secret keys, nonces, verification codes, test data, slugs and identifiers, and CSRF tokens — any case where you need unpredictable, unique strings.

Strings are generated using crypto.getRandomValues() — the browser's cryptographically secure random number generator (CSPRNG). This is suitable for generating tokens and keys used in security contexts.

You can combine: Uppercase letters (A–Z), Lowercase letters (a–z), Numbers (0–9), and Symbols (!@#$%^&*...). At least one character set must be selected.

Each generated string can be up to 256 characters long. You can generate up to 100 strings at a time.

No. All strings are generated locally in your browser using the Web Crypto API. No network requests are made. The page works completely offline once loaded.