Random String Generator

When to use?

Use it when you need an unpredictable random string — a temporary password, API key, or secret token. Set the character set and length freely.

How to use

• Choose the character set (uppercase, lowercase, numbers, symbols).
• Set the string length.
• Choose how many to generate and press generate.
• Copy the result.

Input Explanation

Combine uppercase (A-Z), lowercase (a-z), numbers (0-9), and symbols (!@#$, etc.). Length is up to 256 characters.

Calculation Basis

It draws random numbers with Math.random() or Crypto.getRandomValues() from the selected character pool and concatenates characters to the chosen length.

Usage Examples

• Generate temporary passwords - Mix upper/lowercase, numbers, and symbols for a strong temporary password.
• Generate API keys/secrets - Generate a random API key or secret token for development.
• Quick draws - Use it to quickly decide order or selections for meetings or classes.

Examples

• Length 12, upper+lower+numbers → "aB3x9Yk2PqR1" and similar
• Length 32, with symbols → a strong random string usable like an API key

Cautions

• It is based on browser random generation, so it is not suitable for commercial draws with money at stake or high-security randomness.
• For critical account passwords, a dedicated password generator is recommended.

Guides

Choosing character sets

More character types increase the possible combinations. For human entry, exclude ambiguous characters such as 0/O or 1/l to reduce mistakes.

Security note

Random strings are useful for temporary tokens and test data, but production secrets should follow your security policy and be stored safely.

FAQ

What is the max length?

Up to 256 characters.

Can I generate several at once?

Yes, up to 20 at once.

Can I copy the generated string?

Yes. Copy each generated string with its copy button.

Is it cryptographically secure?

Where supported, it uses Crypto.getRandomValues() for hard-to-predict randomness. For important account passwords, use a dedicated generator.

Related Tools

• Passphrase Generator - Generate an easy-to-remember passphrase by combining words.
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• UUID Generator - Generate up to 20 cryptographically secure UUID v4 values at once.
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• Ladder Game - Enter participants and result items to connect them randomly.
• Spin Wheel Picker - Pick one item randomly from a candidate list like a spinning wheel.