How to Format JSON Online

Why Format JSON?

Raw JSON from APIs often comes as a single compressed line, making it nearly impossible to read. Formatting adds indentation and line breaks so you can quickly understand the data structure.

Common JSON Formatting Needs

API Debugging — Format responses from REST APIs to find the data you need

Config Files — Clean up package.json, tsconfig.json, and other configs

Data Analysis — Make large datasets readable for manual inspection

Documentation — Include well-formatted JSON examples in docs

Why Use a Client-Side Formatter?

Many online JSON formatters send your data to a server. This is a privacy risk if you're working with API keys, customer data, or internal configurations. Our formatter processes everything locally using JavaScript's native JSON.parse() and JSON.stringify().