JSON Toolkit

    JSON Editor

    Text & tree views, validation

    Sample Data

    Load sample JSON to get started

    User Profile

    Simple user profile object

    Object · 7 keys

    API Response

    REST API response with pagination

    Object · 4 keys

    Configuration

    Application configuration file

    Object · 5 keys
    Valid JSON
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    How this tool works

    The page keeps your document in a single text buffer. As you type, the toolbar runs JSON.parse in the browser: valid documents enable Tree view (interactive react-json-view) and show a green badge; invalid input disables the tree and surfaces the parser message.

    Format and Minify re-serialize the parsed value (same semantics as JSON.stringify with 2-space indent vs compact). Copy / Download use the raw editor text. Input sources replaces the buffer from paste, file, or URL; sample cards load curated examples.

    Tips

    • Fix syntax errors before using Tree view—edits there round-trip through JSON.stringify.
    • URL fetch must be allowed by CORS; private APIs often block browser requests.
    • Use fullscreen when editing large payloads; validation still runs on every change.
    • After Format, key order follows the parsed object (order may differ from your original file).