JSON Formatter & Validator
Format, validate, and minify JSON. Errors show the exact line and column. Nothing you paste leaves your browser.
Frequently asked questions
- Is my JSON data sent to a server?
- No. Parsing and formatting happen entirely in your browser using JavaScript's built-in JSON handling — nothing you paste is transmitted anywhere, which matters if you're working with API keys, internal data, or anything else sensitive.
- What does 'validate' actually check?
- It checks that the text is syntactically valid JSON — correct brackets, quotes, commas, and value types. If it isn't, you'll get the line and column where parsing failed, so you don't have to scan the whole document by eye.
- What's the difference between Format and Minify?
- Format adds line breaks and indentation to make nested structure easy to read. Minify strips all unnecessary whitespace to produce the smallest possible file size — useful when you're sending JSON over a network rather than reading it.
- How does JSON to CSV export work?
- It expects a JSON array of objects at the top level — the common shape for API responses and exported records. Each object's keys become CSV columns. Nested objects or arrays inside a row are kept as JSON text within that cell rather than discarded, so no data is lost in the conversion.