JSON Formatter & Validator

Paste JSON → auto-formatted tree view with syntax highlighting. Drag the divider to resize panels.

Input1 lines · 0 chars
1
⋮
Output (Tree View — click ▶ to expand)
Formatted output appears here...

Frequently Asked Questions

What is a JSON formatter?

A JSON formatter takes raw or minified JSON data and adds proper indentation to make it human-readable.

Is my JSON data stored?

No. All processing happens in your browser. Your data never leaves your device.

Can I format large JSON files?

Yes. The tool handles files up to several megabytes depending on your device memory.

What errors can it detect?

Missing commas, unquoted keys, trailing commas, mismatched brackets, and invalid values.

Related Tools

Convert Case · Base64 Encoder · All Tools