Random String Generator
Generate random strings with custom length and characters.
Frequently Asked Questions
What character sets are available?
You can include or exclude: uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9), common symbols (!@#$%^&*), extended symbols (brackets, pipes, tildes), and custom characters you define. Exclude ambiguous characters (0/O, 1/l/I) for human-readable strings.
Is the randomness cryptographically secure?
Yes — the tool uses the Web Crypto API (crypto.getRandomValues()) which provides cryptographically secure random numbers. This is the same source of randomness used by browsers for TLS connections and is suitable for generating passwords, tokens, and security keys.
Can I generate multiple strings at once?
Yes — specify the count (up to 1,000) and length, and get a batch of unique random strings instantly. Each string is independently generated with the same character set and length. Copy individual strings or the entire batch.
What is the maximum string length?
The tool supports strings up to 10,000 characters. For most security purposes, 16-64 characters is more than sufficient. A 32-character alphanumeric string provides about 190 bits of entropy — far beyond what any brute-force attack can overcome.
When should I use random strings vs UUIDs?
Use UUIDs when you need a standard 128-bit identifier compatible with databases and APIs that expect UUID format. Use random strings when you need custom length, specific character sets, or higher entropy. Random strings are more flexible; UUIDs are more interoperable and self-describing.