Hash Generator

The Hash Generator computes cryptographic hash digests for text and files directly in your browser. It calculates MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously, so you can compare results across algorithms without running separate commands. HMAC signatures are also used in JSON Web Tokens — decode and verify them with our JWT tool.

SHA-256 and SHA-512 are computed using the browser's built-in Web Crypto API, which provides hardware-accelerated, constant-time implementations. MD5 is computed using the spark-md5 library, as the Web Crypto API does not support MD5. SHA-1 is included for compatibility but should not be used for security-critical purposes, as it is considered cryptographically broken.

The File tab accepts drag-and-drop or file browsing and hashes the file contents directly — useful for verifying downloads. The Compare tab checks whether two hash strings match (case-insensitive). The HMAC tab generates keyed-hash message authentication codes using SHA-1, SHA-256, or SHA-512.

All processing happens client-side. Your text, files, and secrets are never transmitted to any server. For encoding binary hash output as text, use the Base64 encoder. Need a secure random string instead? Try the Password Generator.

1. In Text mode, type or paste text. All four hash digests appear instantly.
2. In File mode, drag and drop a file or click browse. The file is hashed entirely in your browser.
3. In Compare mode, paste two hashes to check whether they match (case-insensitive comparison).
4. In HMAC mode, enter a message, secret key, and select an algorithm. The HMAC updates as you type.
5. Click the copy icon next to any hash to copy it to your clipboard.