Generate Hash & HMAC Checksums Online
Cryptographic hash functions are fundamental to software security and data integrity verification. Whether you need to verify that a downloaded file has not been corrupted, sign an API request with an HMAC, store a password hash in a database, generate a content-based cache key, or create a deterministic identifier from arbitrary data, you need fast, reliable hashing. devtoolkit.sh's Hash Generator computes MD5, SHA-1, SHA-256, SHA-384, and SHA-512 digests from any text or binary input, using the browser's native Web Crypto API for performance and security. The HMAC Generator produces keyed-hash message authentication codes — the standard mechanism for signing API requests, webhook payloads, and session tokens. Both tools run entirely in your browser, which means you can hash sensitive strings like passwords, API secrets, or private data without transmitting them to any server. Results are shown in hex encoding and can be copied with one click.
Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes from any text.
Generate HMAC-SHA-256/384/512 message authentication codes using a secret key.
FAQ
- Which hash algorithm should I use?
- For data integrity and non-security checksums, MD5 or SHA-1 are still widely used despite cryptographic weaknesses. For security-sensitive applications — password hashing, digital signatures, certificate fingerprints — use SHA-256 or SHA-512. Never use MD5 or SHA-1 for passwords; use a dedicated password hashing function instead.
- What is an HMAC and when do I need one?
- HMAC (Hash-based Message Authentication Code) is a hash computed using both the message and a secret key. Use it to sign API requests, verify webhook authenticity, or authenticate session tokens. Unlike a plain hash, an HMAC cannot be forged without knowing the secret key.
- Is my input data safe when I hash it here?
- Yes. All hashing runs in your browser using the Web Crypto API. Nothing is uploaded to any server. You can safely hash sensitive strings like passwords or API secrets for testing purposes.