Token Generator
Generate cryptographically random API tokens, session IDs and secrets in your browser — crypto.getRandomValues, batch output, entropy shown per token.
Entropy per token: 191 bits
Tokens
Generated in your browser with crypto.getRandomValues — never sent, never stored.
Next steps
This tool runs entirely in your browser. Your data never leaves your device — it is not uploaded to any server.
How to use
- 1Set the length, character set, optional prefix and how many tokens you need.
- 2Click Generate — the tokens appear as a list, each with a one-click copy button.
- 3Click Refresh for a new batch; copy the ones you need before leaving the page.
Token Generator
API keys, bearer tokens, webhook secrets, session identifiers, CSV export nonces — most of them are just random strings, and the wrong way to make them is Math.random(). This generator uses crypto.getRandomValues, the browser's cryptographic random source, so every token is uniformly drawn from its character set with no predictable bias.
Choose a length from 8 to 128 characters, a character set (alphanumeric, hex, or alphanumeric plus URL-safe symbols), an optional prefix for grep-ability in logs, and generate up to 50 at once — useful when seeding test fixtures or provisioning multiple services. The estimated entropy in bits is shown for the current settings, so you can see that a 32-character alphanumeric token carries ~190 bits.
Tokens are generated in memory and never transmitted: reload the page and they are gone. That makes the tool safe for production secrets, not just test data — though for anything long-lived, a password manager or secret store remains the right place to keep them.
Frequently asked questions
Is this safe for production API keys?
Yes. crypto.getRandomValues is the same CSPRNG that TLS and password managers rely on, and generation happens entirely in your browser's memory — nothing is sent over the network or persisted. The theoretical security of the token equals the entropy shown, so pick a length that matches your threat model.
How long should my token be?
For internal API keys and session IDs, 32 alphanumeric characters (~190 bits) is far beyond brute-force reach. Hex tokens are popular because they map to bytes exactly: 32 hex characters = 16 random bytes. Symbols add entropy per character but can break systems that don't URL-encode headers — use them only where the consumer handles them.
Token vs UUID vs ULID — which one?
Use opaque random tokens (this tool) when the identifier must be unguessable: API keys, session tokens, webhook secrets. UUIDs/ULIDs are for identifiers that may need to be generated in parallel or sorted by time — they leak timing or count information and should not carry security weight. If you need a sortable ID instead of a secret, use the ULID generator.
Is it safe to paste secrets here?
Yes — generation and checking run locally in your browser. Nothing you type (passwords, tokens, hashes) is transmitted or stored; closing the tab erases everything.
Are the generated secrets cryptographically strong?
Yes — they come from the Web Crypto API (crypto.getRandomValues), the same source your OS uses, not Math.random.
Is this tool free to use?
Yes, completely free — no signup, no subscription, no daily limits, and no watermarks on the output.
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Embed this tool
Put this tool on your own site with one line — it runs entirely in the visitor's browser.
<iframe src="https://zoyku.com/en/tools/token-generator?embed=1" width="100%" height="640" style="border:0;border-radius:16px" title="Zoyku — token-generator" loading="lazy"></iframe>