Random String Generator
Generate random strings
Generated Strings
What Is a Random String Generator?
A random string generator creates strings of random characters with a specified length and character set. This is useful for generating temporary passwords, API keys, tokens, session IDs, and test data. Tooliva's free online random string generator creates cryptographically secure random strings instantly in your browser.
Why Use Tooliva's Online Random String Generator?
Developers need random strings constantly — for temporary passwords, API keys, CSRF tokens, session identifiers, and test data. Tooliva generates secure random strings using the Web Crypto API, supports customizable length and character sets, and can produce multiple strings at once. Everything runs in your browser for complete privacy.
How to Generate a Random String Online
- Choose the string length and character set — letters, numbers, symbols, or a combination.
- Choose how many strings to generate.
- Click Generate and copy the random strings to your clipboard.
Key Features
- Cryptographically secure — uses the Web Crypto API for true randomness
- Customizable length — generate strings of any length from 4 to 128 characters
- Customizable character set — choose letters, numbers, symbols, or any combination
- Batch generation — generate multiple strings at once
- Free and private — no sign-up, no uploads, browser-based
Common Use Cases
Developers generate temporary passwords for user account creation flows. API designers create secure API keys and access tokens. QA engineers generate test data for load testing. Security teams create CSRF tokens and session identifiers. DevOps engineers generate random secrets for configuration files and environment variables.
Frequently Asked Questions
Q: How long should a random string be?
For passwords, 12–16 characters is recommended. For API keys, 32–64 characters provides strong security. For session tokens, 24–32 characters is standard.
Q: Is this truly random?
Yes. Tooliva uses the Web Crypto API's getRandomValues() function, which provides cryptographically secure randomness from your operating system's entropy pool.
Q: Can I include special characters?
Yes. Choose the character set that includes symbols, or create a custom set with exactly the characters you need.
Q: Is the generation private?
Yes. All generation happens in your browser. No data is sent to any server.