JSON tools

Everything you need to work with JSON — format and validate it, compare two documents, and convert to and from CSV, XML and YAML. Every tool runs entirely in your browser.

JSON formatter

Format, validate and beautify JSON.

JSON diff

Compare two JSON documents structurally.

JSON to CSV

Convert a JSON array to CSV.

CSV to JSON

Convert CSV to a JSON array.

JSON to XML

Convert JSON to well-formed XML.

YAML to JSON

Convert YAML config to JSON.

JSON to TypeScript

Generate TypeScript interfaces from JSON.

JSON to Go

Generate Go structs from JSON.

Working with JSON

JSON is the default data format of the web — APIs, config files, logs and databases all speak it. These tools cover the everyday jobs: the formatter tidies and validates, the diff compares two versions structurally, and the converters move data between JSON and the formats your spreadsheets and legacy systems expect.

Frequently asked questions

Are these JSON tools really free?

Yes — every tool here is free, needs no sign-up, and runs entirely in your browser. Your data is never uploaded.

Will my JSON data stay private?

Yes. All parsing and conversion happen locally using your browser's JavaScript engine. Nothing is sent to a server, which is enforced by a strict content-security policy.

Which tool should I use to fix invalid JSON?

Start with the JSON formatter — it validates your input and pinpoints the first syntax error so you can correct it.