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Text & Encoders

Random String Generator Online

Generate random strings with custom length, character set, and count. Perfect for passwords, tokens, and test data.

When filled, only these characters will be used for generation.

How It Works

  1. 1Set the length and quantity of strings. Toggle which character sets to include or type custom characters.
  2. 2Click Generate. Each string is built by randomly selecting characters from the chosen pool.
  3. 3Copy individual strings or all at once to your clipboard.

About Random String Generation

Random strings are essential in software development. They are used as API keys, session tokens, URL-safe unique identifiers, test data fixtures, and temporary passwords. The randomness ensures that each generated string is unique and unpredictable, reducing collision risk and preventing guessing attacks.

This tool runs entirely in your browser using JavaScript's Math.random() function. It is suitable for non-security-critical use cases like generating test data, placeholder content, and unique slugs. For cryptographically secure tokens — such as password reset links or session secrets — use a server-side cryptographic random number generator instead. You can customize the output by toggling uppercase, lowercase, numbers, and symbols, or entering any custom character set.

You may also find our Password Generator, UUID Generator, and Lorem Ipsum Generator helpful.

How to Use

  1. 1. Set the length you need for each string.
  2. 2. Choose which character sets to include — letters, numbers, and symbols.
  3. 3. Set how many strings to generate, then copy the output.

Frequently Asked Questions

Is this cryptographically secure?

This tool uses Math.random() which is not cryptographically secure. For passwords and security tokens, use a dedicated password manager.

Can I use custom characters?

Yes — type any characters in the 'Custom Characters' field to use them as the character pool.

What is the maximum string length?

The maximum length is 256 characters per string.

Can I generate multiple strings at once?

Yes — set the count up to 50 strings per generation.

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