Skip to main content
Back to Numbers generators

Numbers

Hex Token Batch Generator

Used by developers, writers, and creators worldwide.

A hex token batch generator is the fastest way to produce multiple unique hexadecimal tokens in one click, saving developers from writing one-off scripts every time they need test data or placeholder secrets. Hex tokens are the de-facto format for API keys, session identifiers, CSRF tokens, and webhook secrets because they pack high entropy into a compact, URL-safe string of characters 0–9 and a–f. Set the length to 32 characters for 128-bit entropy (the standard minimum for API keys), or push to 64 characters for signing keys and OAuth secrets. Add an optional prefix like `tok_`, `sk_live_`, or `whsec_` so every token is self-documenting the moment it lands in a log or `.env` file. All generation runs in the browser — nothing is transmitted to a server.

Loading usage…

Free forever — no account required

How to use

  1. Choose your options above
  2. Click Generate
  3. Copy your result

Detailed instructions

  1. Set the Count field to the number of tokens you need — enter 10 for a quick batch or up to 100 for bulk seed data.
  2. Set the Length field to 32 for standard API keys, 64 for signing secrets, or 16 for short nonces.
  3. Type an optional prefix such as tok_, sk_test_, or whsec_ into the Prefix field to label every token by purpose.
  4. Click Generate to produce the full batch instantly in the output panel.
  5. Copy the token list and paste it directly into your .env file, test fixture, or database seed script.

Use Cases

  • •Seeding a Postgres staging database with 50 unique API key fixtures for Jest integration tests
  • •Generating prefixed webhook secrets (whsec_) for local Stripe or GitHub webhook testing
  • •Populating a .env file with 64-character placeholder signing keys before production secrets are provisioned
  • •Producing session ID samples for k6 or Locust load-testing scripts that need realistic token shapes
  • •Bulk-generating inv_-prefixed invite codes for a sign-up flow prototype in Postman mock data

Tips

  • →Use prefix sk_test_ for fake secret keys and pk_test_ for fake public keys to mirror real Stripe-style credential pairs.
  • →For CI seed scripts, set count to exactly the number of fixture rows you need so paste-in requires zero editing.
  • →A 40-character token (160 bits) is a good middle ground between the 32-char minimum and the heavier 64-char max — useful for refresh tokens.
  • →Pair even-length tokens with a consistent prefix so total token length stays predictable for any VARCHAR column sizing.
  • →Generate two batches with different prefixes (live_ and test_) to pre-populate both production-mirror and sandbox environments in one session.
  • →If your system strips underscores from config values, use a hyphen prefix like tok- or verify your environment variable parser handles special characters first.

FAQ

how long should a hex token be for an API key

32 characters (128 bits of entropy) is the widely accepted minimum for API keys and session tokens. For signing secrets or long-lived credentials, use 64 characters (256 bits). Shorter tokens like 16 characters are only appropriate for low-value nonces where brute-force risk is negligible.

are these hex tokens safe to use in tests and seed scripts

Yes — the generator uses the browser's built-in crypto.getRandomValues API, which is cryptographically strong. The tokens are well-suited for test fixtures, mock data, and CI seed scripts. For real production secrets, generate server-side using Node's crypto module, Python's secrets library, or a dedicated secrets manager like AWS Secrets Manager.

what's the difference between a hex token and a UUID

A UUID is a 36-character standardized format with hyphens and version bits, giving 122 bits of usable randomness. A hex token is an unstructured string of any length you choose, so you control entropy directly. Hex tokens are often preferred for secrets because they carry no structural metadata that could hint at generation time or version.