Random string generator

Client

Build tokens and sample data with a uniform random choice from your chosen alphabet—use the password generator when you need character-set guarantees for login secrets.

Random string

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Use for API keys, nonces, or test data—random bytes are generated in your browser only. For passwords, prefer the dedicated password generator with mixed character requirements.

Preset

Entropy (approx.): 191 bits — higher is stronger for secrets; length and alphabet size both matter.

Common use cases

  • Create test IDs, correlation IDs, or sample field values when building forms and APIs.
  • Generate URL-safe or hex tokens for local experiments—never as the only secret for production auth without a proper vault.
  • Fill spreadsheets or fixtures with varied strings without hand-typing noise.

Common mistakes to avoid

  • Treating browser RNG as a crypto audit

    Web Crypto and OS-level generators are stronger choices for high-stakes keys. Use this page for convenience and approximate entropy hints, not compliance guarantees.

  • Confusing this with the password generator

    Password mode uses different presets and UX. Open the dedicated password tool when you need human-memorable or policy-shaped secrets.

FAQ

Are generated strings stored or sent to Toolcore?

No. Random choices are made locally in your browser.

More tools

Related utilities you can open in another tab—mostly client-side.