Developer Tool

JSON Formatter & Viewer

Format, validate, minify and explore JSON with an interactive tree viewer. Auto-repair broken JSON, download results 100% runs in your browser.

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Quick Samples

JSON Input

{}

Click Format or Minify to see output

Indent

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Why Use a JSON Formatter?

👁️

Readable Formatting

Transform minified one-line JSON into indented, human-readable structure instantly.

✅

Instant Validation

Detect JSON syntax errors immediately with descriptive error messages showing the exact problem.

🌳

Interactive Tree View

Explore deeply nested JSON by expanding and collapsing nodes in the visual tree.

🔧

Auto-Repair

Automatically fix common JSON issues like trailing commas, single quotes, and unquoted keys.

⬌

Minify for Production

Remove all whitespace to reduce payload size for APIs and storage.

⬇️

Download as File

Save your formatted or minified JSON directly as a .json file to your computer.