JSON Formatter
Paste JSON or a JavaScript object — it formats automatically.
Output will appear here
Tips
- Paste JSON or a JavaScript object into the input — formatting happens automatically as you type.
- JavaScript objects with unquoted keys, single-quoted strings, and trailing commas are supported.
- Errors are shown inline with the exact parser message.
- Use Copy to grab the beautified output to your clipboard.
What is a JSON formatter?
JSON (JavaScript Object Notation) is the standard data format used across web APIs, configuration files, and data pipelines. It is human-readable in principle, but API responses and minified payloads often arrive as a single line with no whitespace — making them nearly impossible to read or debug at a glance.
A JSON formatter (also called a JSON beautifier or JSON prettifier) takes raw or minified JSON and outputs it with consistent indentation and line breaks. This tool does that instantly in the browser — no server, no account, no data sent anywhere.
Common use cases
- Debugging API responses — paste a REST or GraphQL response to quickly find the field you are looking for.
- Reading config files — format minified package.json, tsconfig.json, or similar files before editing.
- Reviewing webhook payloads — inspect the raw body of an incoming webhook to understand its structure.
- Sharing data with teammates — format and copy a clean, readable version to paste into a Slack message or PR comment.
JSON vs JavaScript objects
- Unquoted keys — standard JSON requires double-quoted keys, but this formatter also accepts JavaScript-style unquoted keys like { age: 23 }.
- Single quotes — JSON requires double quotes, but single-quoted strings in JavaScript objects are handled automatically.
- Trailing commas — not valid in strict JSON but accepted here as they are common in JavaScript code.
- Missing or extra brackets — unclosed { or [ are the most common cause of parse errors in large payloads.