JSON Formatter and Validator
Format, compress, and validate JSON. See the exact location of syntax errors and optionally sort object keys.
Local processingCSV JSON Converter
About this tool
Convert CSV rows into JSON objects using the first row as key names, or turn a list of JSON objects into CSV. Adjust the separator, quotation marks, and column-name settings before copying or downloading the result.
Features
- Convert CSV rows into JSON objects
- Convert a list of JSON objects into CSV
- Use the first row as key names
- Choose comma, semicolon, or tab separators
- Copy or download the converted result
How to use
- Paste or import: Provide CSV text or a file, or paste a JSON list.
- Set conversion direction: Choose CSV to JSON or JSON to CSV.
- Convert and download: Review the preview and save the result.
Examples
- Convert spreadsheet exports for use in an application
- Create CSV from a list of JSON records
- Move simple table data between two formats
- Prepare sample data for testing an import
Limitations
- Nested JSON objects are flattened or stringified per cell according to the selected option
- Extremely wide CSV may produce large JSON downloads
- The entered data is processed directly in your browser and is not sent to a server.
FAQ
- How are CSV headers used?
- The first row becomes JSON object keys unless you disable header mode.
- Can JSON arrays of primitives convert to CSV?
- Single-column CSV is produced for primitive arrays; objects use keys as columns.
- What about empty cells?
- Empty CSV cells become empty strings or null depending on the selected option.