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    JSON Formatter Online - Free JSON Beautifier & Validator

    Developer Tool

    Format, validate, minify, and beautify JSON instantly.

    Input JSON
    Formatted Output
    

    JSON Formatter Online
    Section titled “JSON Formatter Online”
    

    Format, validate, beautify, minify, and repair JSON online with MCYG’s free JSON Formatter. Paste your JSON into the editor to check its syntax, format it for readability, minify it for compact output, or use Lazy Fix when supported syntax errors can be safely repaired.
    

    What is a JSON Formatter?
    Section titled “What is a JSON Formatter?”
    

    A JSON formatter is a developer tool that takes JSON data and organizes it into a readable structure. Properly formatted JSON makes objects, arrays, nested values, and key-value pairs easier to read, inspect, and debug.
    

    MCYG’s online JSON Formatter runs directly in your browser and provides formatting, validation, detailed syntax diagnostics, and supported JSON repair functionality without requiring additional software.
    

    How to Format JSON
    Section titled “How to Format JSON”
    

    Using the JSON Formatter is simple:
    

      

    1. Paste your JSON into the Input JSON editor.
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    2. Click Format to validate and format the JSON.
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    3. Review the formatted result in the output area.
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    4. Click Copy to copy the result.
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    The formatter reports syntax problems when the input is invalid, including the relevant line and column when available.
    

    JSON Formatter Features
    Section titled “JSON Formatter Features”
    

      

    • Format JSON — Validate and format valid JSON into a readable structure.
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    • Validate JSON — Check JSON syntax using the browser’s native JSON parser.
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    • Beautify JSON — Format JSON with selectable indentation for easier reading.
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    • Minify JSON — Remove unnecessary whitespace to create compact JSON.
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    • Detailed diagnostics — Identify syntax problems with source location, context, expected syntax, and correction guidance.
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    • Lazy Fix — Attempt supported repairs for malformed JSON and verify the repaired result before accepting it.
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    • Repair details — Review the changes made by a successful Lazy Fix operation.
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    • Copy output — Copy formatted or repaired JSON directly from the output area.
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    • Browser-based tool — Work with the formatter directly in your browser.
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    Format, Beautify, and Minify JSON
    Section titled “Format, Beautify, and Minify JSON”
    

    Format and Beautify
    Section titled “Format and Beautify”
    

    Use Format when you want to validate your JSON and display it in a readable structure.
    

    The Beautify option lets you choose the indentation used for formatted output:
    

      

    • 2 spaces
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    • 4 spaces
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    • Tabs
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    For example, compact JSON such as:
    

    {"name":"John","age":30,"skills":["JavaScript","Astro","JSON"]}