Format and beautify messy JSON instantly. Essential for developers working with APIs and data.
About JSON Formatter
The JSON Formatter helps developers turn messy JSON into clean, readable, indented structures. It’s ideal for inspecting API responses, debugging payloads, and sharing examples with teammates.
How to Use This Tool
- Paste your raw JSON (minified, single‑line, or multi‑line) into the top text area labeled “Paste messy JSON here...”.
- Click Beautify JSON.
- If the JSON is valid, a formatted, indented version appears in the bottom read‑only box.
- If there’s a syntax problem, you’ll see an error message indicating what’s wrong (for example “Unexpected token”).
- Once you’re satisfied, copy the formatted JSON from the output box into your editor, documentation, or API client.
Common Use Cases
- Debugging APIs: Paste response bodies from tools like Postman, curl, or browser dev tools.
- Code review: Share formatted JSON snippets in pull requests or documentation.
- Configuration files: Clean up JSON used in app settings, manifests, or infrastructure scripts.
Tips & Best Practices
- Make sure your JSON uses double quotes around keys and string values, as required by the JSON standard.
- Remove any trailing commas in arrays and objects, which are not allowed in strict JSON.
- For very large objects, consider formatting a smaller subsection first to isolate issues more easily.
Privacy & Data Handling
All formatting is performed locally in your browser using JavaScript. The JSON you paste is not uploaded or stored on any server, which makes the tool suitable for many everyday development tasks.