JSON Formatter
Developer ToolsFormat, validate, and minify JSON with clear error messages.
AI suggestions for JSON input. Review before applying.
AI result
Suggestions
AI-generated suggestions may be inaccurate. Review before publishing. AI processing is optional and content is sent to our AI provider only when you run an action.
Optional AI assistance. Your input is only sent to our AI provider when you run an action.
Invalid JSON:
Valid JSON.
What is JSON Formatter?
JSON Formatter formats, validates, and minifies JSON with clear error messages that point to the exact problem.
How to use JSON Formatter
- 1 Paste your JSON into the input editor.
- 2 Format to pretty-print it or Minify to compact it.
- 3 Copy or download the result.
Supported formats and limits
- Input: JSON
- Output: formatted or minified JSON
- Runs in your browser
Common uses
- Debug an API response that is hard to read.
- Validate JSON before committing it to a config file.
Things to know
- It validates JSON syntax, not whether the data is correct.
- Very large documents depend on your browser memory.
Privacy and file handling
All parsing happens in your browser; your data is never uploaded.
Frequently asked questions
Does it show where my JSON is invalid?
Yes. When parsing fails, an error message describes the syntax problem so you can fix it.
Can I format large JSON files?
The formatter handles large documents, though very large files depend on your device memory.
Can I format very large JSON files?
The formatter runs in your browser and handles typical API responses comfortably. Extremely large files are limited by your device's memory.
Does the tool change my data?
No. It only reformats whitespace and indentation; the values are unchanged.
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