SHA Hash Generator - SHA-1, SHA-256, SHA-512

A SHA hash generator creates a fixed-length cryptographic fingerprint from any input text using the Secure Hash Algorithm family. SHA-256 and SHA-512 are standard for integrity checks, password storage (with proper salting), and digital signatures. This tool processes everything locally in your browser.

1. Enter text: Paste the string, file content, or password to hash.
2. Select algorithm: Choose SHA-1, SHA-256, SHA-384, or SHA-512.
3. Generate: Copy the hex digest for verification or storage.

• Data integrity: Verify downloads or files match a published hash.
• Secure storage: Hash passwords before storing (combine with salt in production).
• Industry standard: SHA-256 is used in TLS, Git, and blockchain.

Use case 1: File verification

Hash downloaded software and compare against the publisher's SHA-256 to confirm authenticity.

Use case 2: Password processing

Generate hashes during development to understand how your system will store credentials.

Use case 3: Commit integrity

Explore how Git uses SHA-1 (and now SHA-256) to identify commits and blobs.

Basic example

Input: hello world
Algorithm: SHA-256
Output: b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9

Advanced example

Input: {"user":"admin","timestamp":1699999999}
Algorithm: SHA-512
Output: (128-character hex string)

Hash mismatch on files

Ensure you hash the exact file bytes, not a text preview. Newlines or encoding differences change the hash.

Using SHA-1 for security

SHA-1 has known collision weaknesses. Use SHA-256 or higher for security-sensitive applications.

• For passwords, use bcrypt or Argon2 in production instead of plain SHA.
• Store hashes lowercase by convention; comparison is case-insensitive in hex.
• Pair with the Base64 encoder if you need shorter representations.

• Generate MD5 hashes with the MD5 generator (non-secure, for checksums).
• Create strong passwords using the password generator.
• Decode tokens with the JWT decoder.

Hashing runs locally in your browser via the Web Crypto API. No inputs or hashes are uploaded; sensitive data stays on your device.