What is Hash & HMAC Generator?
Hash & HMAC Generator computes cryptographic digests and keyed message authentication codes for text and binary data. Hashing is fundamental to software development: verifying file integrity, signing webhook payloads, checking passwords, and building authentication protocols all depend on hash functions.
The tool supports the SHA-2 family (SHA-256, SHA-384, SHA-512) which covers the vast majority of real-world use cases, from TLS certificates to Git commit IDs. HMAC mode adds a secret key to the hash computation, producing the keyed digests used by webhook signature verification, API authentication, and token generation.
How to Use Hash & HMAC Generator
Enter your input text and select the hash algorithm. The tool computes the digest instantly and shows it in hex (the most common format), Base64, and Base64URL. A summary shows the algorithm, input byte count, and digest length.
For HMAC, enter a secret key in the key field. The tool computes the keyed hash using the selected algorithm. To verify a hash, paste the expected digest into the verification field — the tool compares it against the computed result and shows a clear match or mismatch indicator.
Common Use Cases
- Webhook verification: Compute HMAC-SHA256 digests to verify incoming webhook signatures from services like Stripe, GitHub, or Shopify.
- File integrity checks: Hash downloaded files or artifacts to verify they match published checksums before deployment.
- API authentication: Generate HMAC signatures for API requests that use HMAC-based authentication schemes.
- Password hashing review: Compute SHA-256 digests to understand and debug password hashing in authentication flows.
- Data deduplication: Generate content hashes to identify duplicate data in databases or storage systems.