Random String Generator — Free Online Tool
Generate cryptographically random strings of any length (1–512 chars) with configurable character sets: uppercase, lowercase, digits, symbols, and custom characters. Generate up to 100 strings at once. Uses crypto.getRandomValues() — never Math.random().
100% client-side. No uploads. Your data never leaves your browser.
How to use Random String Generator
- Select character sets (uppercase, lowercase, digits, symbols).
- Set length and count.
- Click Generate to produce random strings.
- Copy individual strings or all at once.
Frequently Asked Questions
Is this suitable for generating API keys?
Yes. With 32+ alphanumeric characters from crypto.getRandomValues(), this produces cryptographically secure strings suitable for API keys and tokens.
What does 'No duplicates' do?
Each character in the string appears at most once. Useful when generating lottery draws or shuffled sequences.
Can I generate UUIDs?
For UUID v4 specifically, use the UUID Generator tool. This tool generates raw random strings without UUID formatting.
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