Security

Random Token Generator

Generate a cryptographically random token in hex, Base64URL, or UUID-style formats.

Last reviewed: April 30, 2026Free toolMethodology

Random Token Generator

These fields start with sample inputs. Keep them or replace them, then run the tool to show a fresh result.

Number fields accept plain values and common formatted input such as 250000, 250,000, or 1,234.56.

Result

Calculating the sample result.

Why it matters

Developers frequently need high-entropy random values for API keys, reset links, nonce fields, or temporary credentials.

When to use

  • Creating test secrets
  • Generating reset or invite tokens
  • Producing opaque identifiers for local development

Inputs & Outputs

Inputs

  • Byte length determines how much randomness is generated.
  • Output format controls how the random bytes are rendered.

Outputs

  • Generated token shows the random value in the chosen format.
  • Entropy estimate translates the byte length into approximate entropy bits.

Random generation method

The tool uses the browser's cryptographically secure random generator to produce bytes and then renders them in the selected output format.

Entropy bits ≈ bytes x 8

Worked example

1

Reset-link token

A developer wants a 32-byte random token rendered as Base64URL.

Inputs

  • Byte length: 32
  • Format: Base64URL

Steps

  • Generate secure random bytes
  • Render them in the requested encoding

Result

  • The output is ready for use in a local test flow or application config.

Edge cases & caveats

  • Generated tokens shown in the browser should still be handled carefully if they are used in real systems.
  • Different formats expose the same entropy using different character sets and lengths.

Frequently Asked Questions

Why choose Base64URL over hex?

Base64URL is more compact, while hex is easier to read and compare visually.

How many bytes should I use?

That depends on the use case, but 16 to 32 random bytes is common for many application tokens.

Keep going

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