JSON Formatter
Format, validate, minify and sort JSON with tree view
Use the interactive tool with JavaScript enabled.
How to use it
- Paste JSON or open a local JSON file up to 10 MB.
- Choose Format, Minify, Sort Keys, or Tree. Use Ctrl+Enter or Cmd+Enter to format.
- Copy the full result or download it as a JSON file.
Example
Input
{"name":"Ada","active":true}Output
{
"name": "Ada",
"active": true
}Behavior and limits
Uses JavaScript JSON number precision. Tree previews show at most 200 children per container and use a total node budget; the full formatted result remains available to copy or download. Large results use plain text instead of syntax colors.
About this tool
The JSON Formatter validates and pretty-prints JSON with syntax highlighting and an interactive tree view. Paste any JSON to instantly spot syntax errors, sort keys alphabetically, or collapse deeply nested structures. Switch to minify mode to compress JSON for APIs or storage. Processing runs locally in your browser. Use sample or redacted data when debugging configurations, API responses, or authentication flows.
Questions and answers
- Can I format large JSON files?
- You can open local files up to 10 MB. Larger pasted inputs depend on browser memory. Tree previews are capped and syntax coloring is disabled for large output; copying and downloading still use the full result.
- Can I validate against a JSON Schema?
- The JSON Formatter validates basic JSON syntax. For full JSON Schema validation against a schema document, use the JSON Schema Validator tool.
Related tools
- JSON Schema — Validate JSON against a JSON Schema
- JSONPath Tester — Test JSONPath expressions against JSON
- JSON Compare — Diff two JSON documents side by side
- JSON → YAML — Convert JSON to YAML format and parse YAML back to JSON with live preview
Sources and specifications
Tool processing runs in your browser. Privacy policy and cookie preferences.