Free Online Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384 & SHA-512 hashes instantly.
All processing happens in your browser — nothing is sent to any server.
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About Hash Functions
A cryptographic hash function converts any input (text, file, or data) into a fixed-length string of characters called a hash or digest. The same input always produces the same output, but even a single character change produces a completely different hash.
Hash functions are one-way: you cannot reverse a hash to recover the original input (without brute force). This makes them ideal for verifying data integrity and storing passwords securely.
Algorithm Reference
| Algorithm | Output | Status | Common Use |
|---|---|---|---|
| MD5 | 128-bit (32 hex) | Broken | Checksums, legacy systems |
| SHA-1 | 160-bit (40 hex) | Deprecated | Git commits, legacy TLS |
| SHA-256 | 256-bit (64 hex) | Secure | Bitcoin, TLS certificates, passwords |
| SHA-384 | 384-bit (96 hex) | Secure | High-security applications |
| SHA-512 | 512-bit (128 hex) | Secure | File integrity, HMAC tokens |
Common Use Cases
- File integrity verification — Generate a SHA-256 hash of a downloaded file and compare it to the official checksum to confirm it wasn't tampered with.
- Password hashing — Passwords should be hashed with bcrypt or Argon2, not SHA-256, for storage. SHA-256 is too fast for password use.
- Digital signatures — Sign the hash of a document rather than the document itself.
- API tokens and HMAC — HMAC-SHA256 is the standard for signing API requests (AWS, Stripe, GitHub webhooks).
- Data deduplication — Hash file contents to detect duplicates without comparing byte-by-byte.
Free Hash Generator · All processing is client-side only · No data leaves your browser
Built by Noah AI Labs · Part of the free developer tools suite
Built by Noah AI Labs · Part of the free developer tools suite