Skip to main content
HMAC Generator
Interactive GeneratorLive Generator
0 chars

HMAC Keyed-Hash Generator

Generate HMAC keyed-hash message authentication codes (SHA-256, SHA-512, SHA-1, MD5) online with secret key signing directly in your browser.

HMAC-SHA256 computation
Custom secret key input
Web Crypto API execution
100% private in-browser
Step-by-Step Guide

How to Use HMAC Generator Online

Follow these quick steps to process your data online directly in your browser with zero latency and 100% privacy.

1
Step 1Imports secret key using crypto.subtle.importKey().
2
Step 2Signs message payload using crypto.subtle.sign("HMAC").
Demonstration

Example Input & Output

Computes a cryptographic HMAC digest combining the message payload and secret key.

Message Payload
{"order_id":12345,"amount":99.00}
Generated HMAC-SHA256 Hash
4f8d2e5a1b3c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e
Applications

Common Use Cases

Webhook Verification

Verify Stripe, GitHub, and Shopify webhook signatures.

Knowledge

Frequently Asked Questions

What is HMAC?

HMAC (Hash-based Message Authentication Code) verifies both data integrity and authenticity using a shared secret.

Workflow

Related Tools

All Tools →
CRYPTO HASH

SHA-256 Generator

Generate secure 256-bit SHA-256 cryptographic hashes from text online using Web Crypto API. 100% private in-browser hashing with zero uploads.

Hardware-accelerated Web Crypto API256-bit secure hash (64 hex chars)Zero server transmission
Open tool
CRYPTO HASH

SHA-512 Generator

Generate high-security 512-bit SHA-512 cryptographic hashes from strings online using native Web Crypto API. Fast and private client-side hashing.

512-bit military-grade hash128 hexadecimal charactersHardware-accelerated client-side execution
Open tool
HASH GENERATOR

MD5 Hash Generator

Calculate 128-bit MD5 cryptographic hash checksums from text strings online. Fast, secure client-side hashing directly inside your web browser.

RFC 1321 complianceInstant live hashingHexadecimal 32-char output
Open tool
SECURITY INSPECTOR

JWT Decoder

Decode and inspect JSON Web Tokens (JWT) online. View header, payload claims, expiration timestamps, and signature status in your browser.

Header & Payload claims inspectorExpiration date & countdown timerIssued-at diagnostics
Open tool
SECURITY TOOL

Hash Compare Tool

Compare two cryptographic hashes online. Verify SHA-256, MD5, and SHA-512 checksum parity with case-insensitive matching and instant integrity diagnostics.

Case-insensitive hex matchingAutomatic algorithm detection (MD5, SHA-1, SHA-256, SHA-512)Timing-safe string comparison
Open tool