Are the strings cryptographically secure?

Yes. This tool uses the Web Crypto API (crypto.getRandomValues) which is cryptographically secure, making it suitable for generating API keys, session tokens, and secrets — not just placeholder test data.

What character sets can I include?

You can mix and match: uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9), and common symbols. Enabling more character types increases the entropy of each string.

How long should an API key be?

A 32-character alphanumeric string provides about 190 bits of entropy — more than sufficient for most API keys. 64 characters is common for high-security tokens. The important thing is using a cryptographically secure generator, which this tool does.

Can I generate URL-safe strings?

Yes — use only letters and numbers (no symbols) for URL-safe tokens. Alphanumeric-only strings are safe in URLs, filenames, and most APIs without encoding.

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Random String Generator

Generate random strings, tokens, passwords, and API keys. Choose length, character set, and quantity. Cryptographically secure. Free random string generator.

Length: 32

1256

Count: 5

150

Character Sets

Prefix (optional)

Suffix (optional)

About This Tool

Generate cryptographically secure random strings for API keys, tokens, secrets, and test data. Configure length, character sets, and generate multiple strings at once.