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JSON Editor

Processed locally in your browser.Remote JSON loading is the only action that contacts the server.
Load JSON from a public URL
Input JSON
Output JSON

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Developer Tools · Runs locally in your browserMore Developer Tools

What is JSON Editor?

JSON Editor is a browser-based developer utility for edit structured JSON with syntax highlighting, search, bracket matching and live validation. It keeps source data on the device for normal formatting, validation and conversion actions, so code and API payloads are not uploaded simply to process them. The workspace provides syntax-aware editing, keyboard access, file loading, copy and download controls, and clear errors designed for practical debugging rather than a generic failure message.

Edit structured JSON with syntax highlighting, search, bracket matching and live validation. This makes it useful for API responses, configuration files, test fixtures and data exchanged between development systems.

How to use JSON Editor

  1. Paste JSON, load the original sample, or choose a local .json or .txt file.
  2. Choose the relevant action and review validation details before using the output.
  3. Switch between code and tree views when structural inspection is useful.
  4. Copy or download the result; enable input memory only when the document is not sensitive.

Features

  • Local-first processing with UTF-8 and Unicode support
  • CodeMirror editing with search, history and bracket matching
  • Accessible validation status with line and column details
  • Responsive code and tree views with dark-mode support

Example JSON input

{
  "project": "RankSmartTools",
  "environment": "production",
  "features": ["format", "validate", "convert"],
  "active": true,
  "release": null
}

Frequently asked questions

Normal processing happens in your browser. Data leaves the browser only when you explicitly use a server feature such as loading a remote URL.

Yes. Formatting, Base64 and URL operations use UTF-8-safe browser APIs rather than byte-unsafe shortcuts.

The workspace preserves the original input and reports the closest available line, column and character position.
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