Read minified API responses
Indent dense JSON so objects, arrays and nested values are easier to inspect.
About JSON Formatter & Validator
JSON Formatter & Validator cleans up JSON for reading, produces compact JSON, and reports syntax errors.
Common use cases
Validate configuration
Catch syntax errors such as missing commas, quotes or braces before using a JSON document.
Prepare compact payloads
Minify formatted JSON when you want a smaller text representation for transport or examples.
How it works
1
The browser parses the JSON text according to standard JSON syntax.
2
Formatter mode serializes the parsed value with indentation; minify mode removes unnecessary whitespace.
3
Syntax errors are reported so you can locate invalid input before copying the result.
Privacy & file handling
JSON formatting is local
The JSON text is parsed and reformatted in the browser; it does not need to be submitted to Zavilo for this utility.
Limitations and important notes
- Comments, trailing commas and JavaScript-only syntax are not valid standard JSON.
- Formatting does not validate application-specific schemas or business rules.
- Very large JSON documents can consume significant browser memory and may be difficult to inspect visually.
Format, minify or validate?
| Feature | What it changes | Use when |
|---|---|---|
| Format | Whitespace and indentation | You need readability |
| Minify | Removes unnecessary whitespace | You need compact JSON text |
| Parse validation | Checks JSON syntax | You need to confirm the text is valid JSON |
How to use JSON Formatter & Validator
- 1
Paste JSON into the input box.
- 2
Choose Format, Minify or Validate.
- 3
Copy the processed result.
Tips for better results
- Formatting uses two-space indentation.
- Validation reports the parsing error when JSON is invalid.
Frequently asked questions
Can I minify JSON?
Yes. Minify removes unnecessary whitespace while preserving the data.