Free
CyberChef
Open SourceEncoding & Decoding
The Cyber Swiss Army Knife: encode, decode, hash and transform data in the browser.
encoderdecoderhashbase64
Browse the complete directory — use filters to narrow down.
Encoding & Decoding
The Cyber Swiss Army Knife: encode, decode, hash and transform data in the browser.
JWT · Encoding & Decoding
The official JSON Web Token site: decode, debug and find libraries.