Password Generator
Generate strong random passwords or memorable passphrases using cryptographically secure randomness in your browser.
Local processingRandom String Generator
About this tool
Generate random strings for API keys, temporary identifiers, file names, and test data. Choose hexadecimal, alphanumeric, or URL-compatible characters, or define your own character set. Each generated string can contain up to 512 characters.
Features
- Hexadecimal, alphanumeric, and URL-compatible presets
- Custom character set
- Generate several strings at once
- Cryptographically secure random generation
- Copy one result or the entire list
How to use
- Choose a format: Select hexadecimal, alphanumeric, URL-compatible, or a custom character set.
- Set length and quantity: Choose the number of characters in each string and how many strings to generate.
- Generate and copy: Generate the results and copy the strings you need.
Examples
- Create OAuth state parameters
- Generate hexadecimal values for HMAC testing
- Create several temporary identifiers at once
- Generate temporary file names or identifiers
Limitations
- Maximum length of 512 characters per string
- A custom character set must contain at least one character
- The results are generated directly in your browser using cryptographically secure randomness and are not sent to a server.
FAQ
- How do URL-compatible and hexadecimal formats differ?
- The URL-compatible format uses letters, numbers, hyphens, and underscores. The hexadecimal format uses only 0–9 and a–f.
- Can I use these strings as real API keys?
- The tool uses cryptographically secure randomness, but production keys should still be managed and renewed according to the requirements of the service that uses them.
- Can I generate several strings at once?
- Yes. Set the desired quantity and each result will appear on a separate line.