Tools/HMAC generator

HMAC generator

Sign text with SHA-256, SHA-384 or SHA-512 locally.

AlgorithmKey encoding

Signing key

Message

Key and message never leave your browser. HMAC authenticates a message; it does not encrypt it.

Runs in your browser. Your input is processed on this device.

About the HMAC generator

Sign text with SHA-256, SHA-384 or SHA-512 locally. Inputs are processed on this device.

Is my input saved or uploaded?

Processing happens in this browser tab. This tool does not save your input to your account. Markdown images load only if you explicitly enable them.

HTML entities

Encode and decode HTML entities in your browser.

Base64 Encode / Decode

Convert text to and from Base64, with URL-safe support.

JWT Decoder

Decode a JSON Web Token and inspect its header and payload.