Developer Tools

6 tools. Each page explains what the tool does, where your input is processed, and answers the questions people actually ask about it.

JSON & Data

Format, validate, compare and convert structured data.

JSON FormatterFormat and beautify JSON with configurable indentation and optional key sorting. Runs entirely in your browser.Open tool
JSON ValidatorCheck whether JSON is valid and get the exact line and column of any syntax error, plus size, key count and nesting depth.Open tool

Encoding & Conversion

Encode, decode and convert between common text formats.

API & Security

Inspect tokens, build requests and generate identifiers.

UUID GeneratorGenerate random version 4 UUIDs in bulk, with uppercase and brace formatting options. Generated locally using a secure random source.Open tool

Programming

Editors, playgrounds and generators for everyday coding.

Diff CheckerCompare two blocks of text line by line and see exactly what was added, removed or left unchanged.Open tool