API Key Hasher
Hash API keys using SHA-256 for secure storage. Never store raw API keys — hash them before persisting to your database. Code never leaves your device — formatting and validation run locally in your browser.
How to Use the API Key Hasher
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Frequently Asked Questions
Why hash API keys?
Store hashes, compare on arrival — leaked databases reveal nothing usable.
SHA-256 enough?
For key storage yes; password storage needs bcrypt/argon2 instead.
Salt included?
Add a per-key salt before hashing to defeat rainbow tables outright.
Are my secrets uploaded anywhere?
No — hashing runs locally in your browser, free with no signup.
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Last updated October 2026