{ } JSON Formatter
Format, validate and minify JSON in your browser.
📋 How to Use
1. Paste raw or minified JSON into the input box.
2. Click Format to pretty-print it with proper indentation, or Minify to compress it.
3. If the JSON is invalid, the error message points to roughly where the syntax broke.
✅ Features
Pretty-print and minify in the same tool.
Basic validation catches missing commas, brackets and quotes before you ship broken JSON.
Handles deeply nested objects and arrays without choking.
Format, beautify and validate JSON
JSON (JavaScript Object Notation) is the standard format for sending data between apps and APIs. Raw JSON from an API is often squeezed onto one long line, which is almost impossible to read. This JSON formatter adds clean indentation and line breaks, and tells you straight away if the JSON is invalid.
What it helps with
- Reading API responses while debugging.
- Finding the exact spot of a syntax error, such as a missing comma or bracket.
- Cleaning up config files before committing them.
- Minifying JSON again when you need it compact.
Most common JSON errors
- A trailing comma after the last item in an object or array.
- Single quotes instead of double quotes around keys and strings.
- Keys without quotes, which work in JavaScript but not in strict JSON.
- Comments — standard JSON does not allow them.