Dev / Auth

JWT Builder.

Debugging auth flows means crafting tokens, not just reading them. Edit header/payload JSON, paste an HMAC secret, get a signed JWT.

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HS256 only

Symmetric signing with a shared secret. For RS256/ES256 verify on existing tokens, use the JWT decoder or read the JWT essay. Never paste production secrets into any web tool.

JWT DecoderHMAC GeneratorBase64