Home › Security Tools › Hash Generator

Free Online Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text. Uses the Web Crypto API for cryptographically accurate results with one-click copy.

What Is a Hash Function?

A cryptographic hash function takes an input of any size and produces a fixed-size string of characters. The same input always produces the same hash, but even a tiny change produces a completely different hash. Hash functions are one-way.

SHA Hash Algorithms Explained

SHA-1 produces a 160-bit hash and is deprecated for security. SHA-256 produces a 256-bit hash and is widely used in TLS, Bitcoin, and file verification. SHA-384 and SHA-512 produce longer hashes for extra security.

Common Uses for Hash Functions

Hashes are used for password storage, data integrity verification, digital signatures, blockchain technology, and deduplication.

Related Tools

Password Generator UUID Generator .htpasswd Generator

Frequently Asked Questions

Which hash algorithm should I use?
SHA-256 is recommended for general use. SHA-1 is deprecated for security applications. Use SHA-512 for extra security margin.
Can a hash be reversed?
No. Cryptographic hash functions are one-way. Common short inputs can be found via rainbow tables, which is why passwords should be salted.
Why are there different hash lengths?
SHA-1 is 40 hex chars, SHA-256 is 64, SHA-384 is 96, SHA-512 is 128. Longer hashes reduce collision probability.
Is SHA-1 still safe to use?
SHA-1 is broken for collision resistance and should not be used for security-critical applications. It is still acceptable for non-security purposes like checksums.
Is my text sent to a server?
No. All hashing is performed entirely in your browser using the Web Crypto API. Your text never leaves your device.

More from TUDITOOLS

CyberCheckTools
Online security tools & privacy checkers
ConvertAnything
Unit conversion tools for everything
Easy Calculators
100+ free everyday calculators