---
title: "Hash generator — free, runs in your browser"
description: "SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, computed in your browser. Free, no sign-up, and nothing you enter leaves your browser."
url: https://atoneplace.net/tools/hash-generator/
site: "At One Place"
---

# Hash generator

SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, computed in your browser.

## How it works

Computes cryptographic hashes using the browser’s built-in Web Crypto implementation. Nothing is transmitted.

A hash is one-way by design. There is no operation that recovers the input, and any site offering to "decrypt" a hash is either looking it up in a table of precomputed common inputs or guessing. That is exactly why unsalted hashes of passwords are inadequate — common passwords are all in those tables already.

MD5 and SHA-1 are both broken for security purposes: practical collision attacks exist, meaning two different inputs can be made to produce the same hash. They remain fine as checksums against accidental corruption, which is a different problem. SHA-256 and above are the ones to use where it matters.

Note that a hash is not encryption. Encryption is reversible with a key; hashing is not reversible at all.

> This tool runs entirely in your browser. Nothing you enter is sent to a server, logged or stored, and the page keeps working with the network disconnected.

## Common questions

### Can you reverse a hash?

No. Hashing is one-way. Sites claiming to decrypt hashes are looking the value up in a table of precomputed common inputs.

### Is SHA-1 still safe?

Not for security. Practical collision attacks against it were demonstrated in 2017. It is still adequate as a checksum against accidental corruption.

### Why is MD5 not offered here?

It is broken for security use and the Web Crypto API deliberately does not implement it. SHA-256 or better is the right choice for anything that matters.

## Related pages

- [Password generator](https://atoneplace.net/tools/password-generator/)
- [Merge PDF files](https://atoneplace.net/tools/pdf-merge/)
- [QR code generator](https://atoneplace.net/tools/qr-code-generator/)
- [Image resizer](https://atoneplace.net/tools/image-resizer/)
- [Split and extract PDF pages](https://atoneplace.net/tools/pdf-split/)
- [Random number generator](https://atoneplace.net/tools/random-number-generator/)
- [Random picker and team generator](https://atoneplace.net/tools/random-picker/)
- [Image crop, rotate and flip](https://atoneplace.net/tools/image-crop-rotate/)
- [Lorem ipsum generator](https://atoneplace.net/tools/lorem-ipsum-generator/)
- [Meta tag generator](https://atoneplace.net/tools/meta-tag-generator/)

## Sources

- Calculated on this page — At One Place (/about/)