Hash Generator

A hash is a fixed-length fingerprint of some data — change a single character of the input and the hash changes completely. The Hash Generator computes the most common hashes (MD5, SHA-1, SHA-256 and SHA-512) of any text you paste, updating live, which is invaluable for verifying integrity, comparing values and learning how hashing works.

How to use the Hash Generator

1. Paste or type your text.
2. Watch all four hashes calculate instantly.
3. Copy whichever hash you need.

What hashes are used for

Developers compare hashes to confirm that a file or message was not altered in transit — if two hashes match, the content is identical. Hashes index data, power checksums, and underpin many security systems. It is important to choose the right one: MD5 and SHA-1 are perfectly fine for quick integrity checks and learning, but they are considered broken for security-critical purposes, where SHA-256 or SHA-512 should be used instead.

Tips and cautions

• Use SHA-256 or SHA-512 for anything security-related.
• MD5 and SHA-1 are fine for checksums, not for protecting secrets.
• The smallest change flips the whole hash, which is exactly what makes comparison reliable.
• Hashing is one-way; you cannot turn a hash back into the original text.

The SHA hashes use your browser's built-in cryptography for accuracy, and everything is computed locally, so your input is never uploaded.

Quick reference