What this site is
TokenTonic is a free mock access token generator for developers. It creates realistic-looking API keys, Bearer tokens, hex secrets, base64url strings and mock JWTs — with proper prefixes and entropy readouts — entirely in your browser. The output is test data: random strings with no connection to any account or service, meant for testing auth code, writing documentation and seeding dev environments.
The guides
The guides cover the other half of the job: what access tokens actually are, the formats they take in the wild, where mock tokens are useful, and the security practices that keep real credentials safe.
Honest limits
Generated output is random data for practice, testing, documentation and creative use. It carries no connection to any real account, service or system, and must never be treated as real credentials or real security material. The limits are stated on the generator page itself — please read them before using the output.
No accounts, no tracking
There is nothing to sign up for and nothing to install. The whole tool is a small JavaScript file that runs on your device.