Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly. All processing happens in your browser — nothing is sent to any server.
Enter text above to generate hashEnter text above to generate hashEnter text above to generate hashEnter text above to generate hashSHA-256 vs SHA-512
SHA-256 produces a 256-bit (32-byte) hash; SHA-512 produces 512-bit (64-byte). Both are part of SHA-2 and are cryptographically secure. SHA-512 may be faster on 64-bit CPUs.
Common Use Cases
File integrity verification, data fingerprinting, digital signatures, checksums, HMAC generation, and API request signing. Use bcrypt/argon2 for password storage.
Why SHA-1 is Deprecated
SHA-1 collision attacks have been demonstrated. Avoid SHA-1 for security-sensitive applications. Use SHA-256 or higher for new projects.
Browser API
This tool uses the browser's built-in SubtleCrypto API — the same cryptographic primitives used by TLS. No external libraries required.
How to Generate SHA Hashes Online
- 1. Type or paste any text into the Input Text field — all four hashes compute instantly.
- 2. Toggle UPPERCASE output if your use case requires uppercase hex digits.
- 3. Click Copy next to any algorithm to copy that hash to your clipboard.
- 4. Compare the hash against a known checksum to verify file or data integrity.
Frequently Asked Questions
What is a hash function?
A cryptographic hash function takes any input and produces a fixed-size digest. The same input always produces the same hash, but even a one-character change creates a completely different output. Hashes are one-way — you cannot recover the original input from the hash.
Which SHA algorithm should I use?
Use SHA-256 for most applications — it is the current standard for file integrity, digital signatures, and TLS certificates. Use SHA-512 for additional security on 64-bit systems. Avoid SHA-1 for new projects as it has known collision vulnerabilities.
Can I use SHA-256 to hash passwords?
No. SHA-256 is intentionally fast, making it easy to brute-force. For password storage, use bcrypt, scrypt, or Argon2 — algorithms designed to be slow and resistant to GPU attacks.
Is my input sent to a server?
No. This tool uses the browser's built-in SubtleCrypto Web API — the same API used by TLS/HTTPS — entirely in your browser. Your text never leaves your device.