SADevToolBox

JSON Tools

JSON is the everyday language of APIs, configuration files and logs. These tools help you read it, check it and turn it into the shape your code needs.

JSON Formatter Pretty-print JSON with your choice of indentation and optional key sorting. JSON Validator Check JSON syntax and pinpoint errors by line and column. JSON Minifier Remove whitespace from JSON and see how many bytes you save. JSON Beautifier Turn loose JSON with comments, single quotes or trailing commas into clean JSON. JSON to CSV Convert JSON arrays to CSV with flattened nested fields. JSON to XML Convert JSON objects and arrays to well-formed XML. JSON to C# Class Generate C# model classes with inferred types from sample JSON. JSON to TypeScript Interface Generate TypeScript interfaces from a sample JSON object.

About these tools

Start with the formatter or validator when a payload will not parse or is hard to read: both report the exact line and column of the first syntax error. Use the minifier when you need the smallest possible payload for a request body, a query string or a config value.

The converters save time when JSON has to move into another system. Flatten an array of records into CSV for a spreadsheet, produce XML for a legacy integration, or generate strongly typed C# classes and TypeScript interfaces from a sample API response instead of writing them by hand.

Every JSON tool on this page processes your input with JavaScript inside your browser, so the data you paste is not uploaded to our server.

Frequently asked questions

What is the difference between formatting and validating JSON?

Formatting re-indents valid JSON so it is easy to read. Validating checks whether the text is valid JSON at all and explains where and why parsing fails. The formatter also validates, but the validator gives more detail about problems such as duplicate keys.

Is my JSON sent to a server?

No. The JSON tools run entirely in your browser using JavaScript. The page is loaded from our server, but the text you paste is processed locally.