Random String Generator
Generate random alphanumeric strings, passwords, tokens, and codes with customizable length and character sets.
About This Free Online Random String Generator
Our free online Random String Generator creates cryptographically random strings of any length with fully customizable character sets. Choose from lowercase letters, uppercase letters, digits, symbols, or a custom character set. Perfect for generating API keys, session tokens, verification codes, random passwords, test data, and unique identifiers. Generate multiple strings at once with optional prefix/suffix. All processing is done in your browser.
Features of Our Random String Generator
- Configurable string length (1 to 256)
- Customizable character sets (lower, upper, digits, symbols)
- Multiple string generation (1 to 50)
- Optional prefix and suffix
- Cryptographically random generation
- Bulk copy all generated strings
- 100% private — browser-only processing
How to Use the Random String Generator
Using this tool is simple and requires no signup or registration. Follow these steps:
- Set your desired string length using the slider or number input.
- Choose which character types to include.
- Select how many strings to generate.
- Copy your generated strings.
Frequently Asked Questions About Random String Generator
How random are the generated strings?
The tool uses crypto.getRandomValues() for cryptographically strong random generation, suitable for tokens, keys, and passwords.
Can I use a custom character set?
Yes. You can type any custom set of characters to use for generation.
What is this useful for?
API keys, session tokens, CAPTCHA codes, password generation, test data, unique identifiers, coupon codes, and more.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.