SHA3-384 Hash Generator

What the SHA3-384 generator does

This produces the SHA3-384 hash of your text, a 96-character hex fingerprint. Type or paste your text, press Convert, and copy or download the result. Like every hash it is one-way, so the result cannot be turned back into your text.

It runs in your browser, so nothing you enter is uploaded.

How to use it

1. Enter your text. Type or paste it, or upload a plain text file.
2. Press Convert. The 96-character SHA3-384 hash appears, ready to Copy or Download.

Built to match SHA-2's sizes

SHA3-384 is the second-largest of the four SHA-3 hashes, and its 384-bit length is no accident. When NIST standardised SHA-3, it deliberately gave the new family the same four output sizes as SHA-2: 224, 256, 384, and 512 bits. The idea was to make SHA-3 an easy swap. Anywhere a system already used a 384-bit SHA-2 hash, SHA3-384 could step into the same slot without changing how much space the fingerprint takes or how the surrounding code is shaped. So the 384 size exists largely to mirror its SHA-2 counterpart, while bringing SHA-3's completely different internal design, the sponge construction described on the SHA3-256 page, along with it.

SHA3-384 and SHA-384 are not the same

Matching the length is exactly why it is worth being careful here. SHA-384, from the older SHA-2 family, and SHA3-384, from SHA-3, both produce a 96-character hash, but they are different algorithms and produce different results from the same text. The shared size is for compatibility of shape, not of value. If something asks for SHA-384, use the plain SHA-384 tool; if it asks for SHA3-384, this is the one. Read the name carefully, because that small "3" changes everything underneath.

The library doing the work

The hashing is handled by js-sha3, a small JavaScript library implementing the SHA-3 family. Your text is read as UTF-8 bytes and run through the sponge in your browser, with the 96-character hex result handed back.

Questions people ask

Is SHA3-384 the same as SHA-384?

No. They share a 96-character length but come from different families built on different designs, and the same input gives different results. They are not interchangeable.

Why does SHA-3 copy SHA-2's sizes?

So it can drop into the same places. Matching 224, 256, 384, and 512 bits lets SHA-3 replace a SHA-2 hash of the same size without reshaping the system around it.

Can I reverse a SHA3-384 hash?

No. It is one-way, so the original text cannot be recovered. The SHA-256 page explains why no hash can be reversed.

References

1. National Institute of Standards and Technology (2015). FIPS PUB 202: SHA-3 Standard: Permutation-Based Hash and Extendable-Output Functions. https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf
2. js-sha3, a SHA-3 and Keccak implementation for JavaScript (npm package). https://www.npmjs.com/package/js-sha3