JSON Formatter – Beautify & Format JSON Online | MZ Smart Tools House
Format valid JSON into readable indentation in your browser while preserving parsed values and structure. Invalid JSON is reported instead of silently changed.
Format compact or messy JSON into a readable two-space-indented representation.
How it works
JSON.parse validates the input, then JSON.stringify(value, null, 2) produces the formatted output.
Example
{"name":"Mujtaba","active":true} becomes readable multi-line JSON.
How to use
- Paste JSON into the input area.
- Run the formatter.
- Fix any validation error if the JSON is not valid.
- Copy the readable formatted output when it matches your data.
Key features
- JSON validation before formatting
- Readable indentation
- Local browser processing
- Copy-ready output
Common uses
- API response debugging
- Configuration files
- Readable logs and payloads
Supported formats
- Input: JSON text
- Output: formatted JSON text
Frequently asked questions
Will invalid JSON be formatted?
No. Invalid JSON is rejected instead of being silently changed.
Does formatting change values?
No. Formatting changes whitespace around parsed JSON structure, not the values.
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