Tools/JSON Formatter
Data & Config Formats

JSON Formatter

Paste minified or messy JSON and get a clean, correctly indented version with syntax errors flagged immediately.

Free & unlimitedRuns in your browserNo sign-up required
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How it works

Three steps, no setup

1

Paste your JSON

Minified, single-line, or partially broken JSON all work as input.

2

Pick an indent style

Choose 2 spaces, 4 spaces, or tabs to match your project style.

3

Copy the formatted result

Or fix the reported error and re-validate instantly.

Common questions

Frequently asked questions

What happens if my JSON is invalid?
The tool shows a clear parse error pointing at roughly where the syntax breaks, instead of failing silently.
Does formatting change the data?
No — only whitespace changes. Keys, values, and structure remain identical.
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