Is this JSON formatter free to use?

Yes, completely free with no sign-up required. Use it as many times as you need.

Does my JSON data get sent to a server?

No. All formatting and validation happens 100% in your browser. Your data never leaves your device.

What is the difference between formatting and minifying JSON?

Formatting (beautifying) adds indentation and line breaks to make JSON human-readable. Minifying removes all unnecessary whitespace to reduce file size - useful for production APIs and config files.

Can this tool fix broken JSON?

The tool will identify and highlight syntax errors like missing commas, unclosed brackets, or invalid characters, but it won't auto-fix them. You'll need to correct the errors manually based on the error messages.

JSON格式化工具 | TinyToolbox

Paste or type your raw JSON into the input panel on the left. Click **Format** to instantly beautify it with proper indentation, or click **Minify** to compress it into a single line. You can choose between 2-space and 4-space indentation using the dropdown. The tool also validates your JSON in real time - if there's a syntax error, you'll see a clear error message pinpointing the issue. Click **Sample** to load example JSON and see the formatter in action. Everything runs locally in your browser - your data never leaves your device.

Paste your JSON

Click inside the left editor panel and paste your raw, unformatted JSON data.

Fix validation errors

If the data is invalid, the bottom banner will turn red and identify the syntax error. Fix it before proceeding.

Format or Minify

Click the 'Format JSON' button to beautify the code with proper indentation, or click 'Minify JSON' to compress it.

Copy or Download

Click the Copy button to copy the formatted result, or use Download to save it as a .json file.

JSON格式化工具

如何使用 JSON格式化工具

Paste your JSON

Fix validation errors

Format or Minify

Copy or Download

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