Can a hash be reversed to recover the text?

A cryptographic hash is designed to be one-way. It verifies that inputs match; it is not an encoding that can be decoded.

Which hash should I use?

SHA-256 or SHA-512 are appropriate for modern checksums. MD5 and SHA-1 remain useful for compatibility checks but should not be used where collision resistance is a security requirement.

Why does a tiny text change produce a different hash?

Hash functions are designed so even a one-character change produces a substantially different digest.

Hash Generator

LocalFree

Generate SHA-1, SHA-256, SHA-384, SHA-512 and MD5 hashes from any input. Computed locally with the Web Crypto API.

Input text

Input

MD5
SHA-1
SHA-256
SHA-384
SHA-512

Runs in your browser; files and input stay on this device

How to use Hash Generator (SHA-1, SHA-256, SHA-512, MD5)

1Type or paste the text you want to hash.
2Read the MD5, SHA-1, SHA-256, SHA-384, and SHA-512 values generated from the same input.
3Copy the hash required by your workflow.

Frequently asked questions

Can a hash be reversed to recover the text?: A cryptographic hash is designed to be one-way. It verifies that inputs match; it is not an encoding that can be decoded.
Which hash should I use?: SHA-256 or SHA-512 are appropriate for modern checksums. MD5 and SHA-1 remain useful for compatibility checks but should not be used where collision resistance is a security requirement.
Why does a tiny text change produce a different hash?: Hash functions are designed so even a one-character change produces a substantially different digest.