JSON Formatter
Beautify, validate, and minify JSON online. Clean messy JSON data, check syntax errors in your browser, inspect nested objects with tree view, and download formatted output.
JSON validation runs safely in your browser using native JSON parsing. Your data is not uploaded to a server.
Formatter Controls
Beautify, minify, and validate JSON directly in your browser. JSON validation uses native parsing and does not upload your data.
Mode
Indentation applies only in beautify mode.
View options
Status
Valid JSON.
Root type
object
Keys / items
5
Output lines
1
Error location
-
JSON Tree View
Expand and collapse nested objects and arrays for easier JSON inspection.
Included features
- Beautify and minify JSON in the browser.
- Proper JSON validation using native JSON parsing.
- Line numbers in both input and output editors.
- Aligned line numbers with fixed editor spacing.
- Error line highlighting for invalid JSON.
- Code-frame style error preview.
- Tree view with expand and collapse support.
- Upload, copy, and download JSON support.
What can this JSON formatter do?
This tool formats raw JSON into a clean readable structure, validates JSON syntax, minifies JSON for compact usage, and shows a collapsible tree view for nested objects and arrays.
How to use
- Paste JSON data into the input editor.
- Select beautify or minify mode.
- Click Beautify JSON, Minify JSON, or Validate JSON.
- Use tree view to inspect nested data.
- Copy or download the output.
Common use cases
Use it for API responses, configuration files, frontend debugging, backend payload inspection, database exports, webhook payloads, and quick JSON cleanup before sharing with teammates.
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