Validate API key format and structure — charset, length, and provider prefix patterns checked instantly without exposing secrets anywhere. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Generate secure API keys with configurable length, character set, and optional prefix. Use with any authentication scheme.
Validate OAuth state parameters for format, length, and age — catch CSRF holes before they ship. Nothing leaves your browser.
Inspect JSON API payloads for structure, size breakdown, and key depth — spot sensitive fields before sharing logs before production incidents.
Validate IBAN structure, length, and mod-97 check digits for 80+ countries. Catch transfer typos before money moves — local ibantools work, free, no signup.
Share secrets securely via self-decrypting note links — AES ciphertext in the URL fragment, key in the link query. Send passwords without trusting inboxes — local crypto-js AES, free, no signup.
Format only — structure, entropy, and provider-prefix patterns checked instantly. No offline check can confirm a key works with its issuer; only a real API call to the provider can verify that.
Charset, length, and prefix patterns per provider convention.
Validation runs locally in your browser — keys never leave the tab.
No — validation runs locally in your browser, free with no signup.