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Random String Generator

Generate random strings, tokens and IDs in bulk.

  • 100% Free
  • No Sign Up
  • Works in Your Browser

Random string generator

Random strings, tokens and IDs

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How to use the random string generator

Three steps, all in your browser.

  1. 1

    Choose what you need

    Pick the type and how many. Results appear straight away.

  2. 2

    Set the options

    Choose the length, count or algorithm. The output updates instantly.

  3. 3

    Copy the result

    Copy the output in one click. Nothing is saved or sent anywhere.

Random String Generator: what to know

The random string generator creates strings of any length from the characters you choose: letters and digits, hex, digits only, Base64url, Base58, Crockford Base32, or a custom set of your own. Generate one or many at a time. Every character comes from crypto.getRandomValues, the browser's cryptographically secure random generator, with no bias toward any character.

The strength of a random string depends on its length and alphabet: each character adds log2(alphabet size) bits. A hex character adds 4 bits, so 32 hex characters give 128 bits, the usual minimum for session tokens, API keys and reset links. A letters-and-digits alphabet (62 characters) adds about 5.95 bits each, so 22 characters reach 128 bits.

Generated strings stay on your device. For identifiers that only need to be unique rather than secret, the UUID generator gives a standard format your database and tools already understand.

Popular uses

  • API keys, secrets and salts for development
  • Coupon codes, invite codes and short IDs
  • Test data and random fixtures
  • Nonces and state values for testing OAuth flows

Tips for the best result

  • Use Base58 or Crockford Base32 for codes people will read and type: they leave out look-alike characters such as 0/O and 1/l.
  • For production secrets, generate them where they're used (your secret manager or server), and never commit them.
  • Use hex for values that go into URLs and headers without escaping.

Read how JustYourDev works and our privacy details. Code, data and files you use here are processed in your browser and are never sent to our server.

Frequently asked questions