JSON Formatter

Professional JSON formatter with tree view, diff compare, schema validation, and syntax highlighting.

✨ JSON Formatter

Format, validate, and analyze JSON with advanced tools

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⚙️ Format Options
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Paste JSON above and click "Format" to see the output here

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What is a JSON Formatter?

A JSON formatter is an online tool that takes raw, unstructured JSON text and transforms it into a clean, indented, and human-readable format. JSON (JavaScript Object Notation) is the universal data format used by APIs, configuration files, and web applications, but it is often minified or poorly indented: making it hard to read and debug.

CodeHelper's JSON Formatter & Validator goes far beyond simple pretty-printing. It includes a collapsible tree view, a diff comparison tool, JSON Schema validation, and support for JSONC (JSON with comments).

Key Features

  • Beautify & Minify: Instantly format minified JSON or compress it back for production.
  • Tree View: Navigate large JSON structures with collapsible nodes.
  • JSON Diff: Compare two JSON documents and highlight the differences.
  • Schema Validation: Validate your JSON against a JSON Schema to catch structural errors.
  • Sort Keys: Recursively sort all keys alphabetically for consistency.

How to use the JSON Formatter

  1. Paste your raw or minified JSON into the input panel.
  2. Click Format to instantly beautify and validate it.
  3. Use the tree view to navigate and collapse nested objects.
  4. Switch to the Diff tab to compare two JSON files side-by-side.
  5. Copy the formatted output or download it as a file.

Whether you are debugging an API response, editing a configuration file, or validating data against a schema, this free online JSON formatter is the fastest way to work with JSON data.