Toolzie

JSON Formatter & Validator

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How to Use the JSON Editor

Paste JSON or type. Real-time validation with error highlights. Tree view, format, minify. Edit values directly.

JSON is daily work for developers. Validate, format, explore nested structures easily.

Frequently Asked Questions

Real-time?

Yes, continuous validation.

Minified?

Yes, prettify compressed JSON.

Large files?

Yes, handles large documents.

Tree edit?

Yes, edit values directly in tree.

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About This Tool

View, edit, format, and validate JSON data with the Toolzie JSON Editor. Switch between tree view and raw text view, collapse nested objects, and detect syntax errors instantly — ideal for developers working with APIs.

How to Use

  1. Paste or type JSON into the editor.
  2. Use tree view to navigate and edit nested properties.
  3. Use the format button to pretty-print minified JSON.
  4. Errors are highlighted automatically — fix them and validate.

Frequently Asked Questions

Does it validate my JSON?

Yes — syntax errors are highlighted in real time with the line number and error description.

Can I collapse large JSON objects?

Yes — in tree view, click any object or array node to collapse or expand it.

Can I search within JSON?

Use your browser's built-in find (Ctrl+F) in text mode to search through the JSON content.

Can I minify JSON?

Yes — use the Minify button to remove all whitespace and produce compact JSON.