CyberChef
GCHQ's browser-based "Cyber Swiss Army Knife" for decoding, decrypting, transforming and analysing data.
CyberChef is a browser-based utility designed for decoding, decrypting, transforming, and analysing various types of data. Security professionals and researchers use it to process encoded information and analyse data in the browser. Its modular approach allows users to chain operations for complex data manipulation tasks.
Official site: https://gchq.github.io/CyberChef/
Source: https://github.com/gchq/CyberChef
Last verified 2026-10-01.