I got tired of developer tools that want an account, a credit card, or a pile of ads before they'll format ten lines of JSON. So I built my own set and put them in one place. There are 112 of them, they are free, and none of them needs a signup.

Here is what's inside, grouped by the job you're usually doing.

Formatters and validators (45 tools)

This is the biggest group. Paste messy code, get clean code back.

JSON Formatter and Validator : beautify and validate JSON with syntax highlighting

JSON Diff : compare two JSON documents and see what changed

JSON Tree Viewer : explore big JSON as a collapsible tree

CSS, HTML, JavaScript, C#, Java, Go, GraphQL and CSV formatters

Encoding and security (18 tools)

JWT Decoder : read the header and payload of a token

Bcrypt Generator : hash a test password

Base64, hex, binary and HTML encoders and decoders

Network and DNS (10 tools)

DNS Lookup and DNS Propagation : check whether your DNS change has spread

Email Auth Checker : check your email authentication…