# Free Hash Generator (SHA-256, SHA-512) Online | Alher Tech

> Generate cryptographic hashes online: SHA-1, SHA-256, SHA-384, SHA-512. Verify file integrity, generate content fingerprints. 100% client-side.

- Canonical page: https://alhertech.com/en/hash-generator/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes instantly. Useful for integrity checks and content fingerprinting.

Generate cryptographic hashes online, sHA-1, SHA-256, SHA-384, SHA-512. Verify file integrity, generate content fingerprints. 100% client-side, your data never leaves your browser.

## Frequently asked questions

### What is a cryptographic hash used for?

Hashes are one-way functions that map any input to a fixed-size string. They're used to verify data integrity (same input → same hash), fingerprint content, generate deterministic IDs, and as building blocks inside signatures and password storage.

### Which hash algorithm should I use?

For integrity checks on modern systems, use SHA-256 or SHA-512; they are fast, widely supported and considered secure. Avoid MD5 and SHA-1 for any new security-sensitive application; they are broken for collision resistance.

### Is hashing the same as encryption?

No. Hashing is one-way. You cannot recover the original input from the hash. Encryption is two-way, with the key, ciphertext can be decrypted back to plaintext. Hashes are used for verification, encryption for confidentiality.

### Why do two identical files sometimes produce different hashes?

Trailing newlines, invisible characters, line-ending differences (CRLF vs LF) or encoding differences (UTF-8 with/without BOM) change the bytes and therefore the hash. Always compare the exact bytes, not the visible content.

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