CSV to JSON Converter
ConvertersConvert CSV data to a JSON array instantly in your browser. Auto-detects headers and casts types. Shows table preview. Swap to JSON→CSV in one click. Client-side.
CSV → JSON
CSVcsv
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JSONjson
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Input: 73 chars
About CSV to JSON Converter
The CSV to JSON converter parses CSV data using csv-parse with automatic type casting — numbers become JSON numbers, booleans become JSON booleans, and the first row is treated as the header. The result is a JSON array of objects keyed by column headers. Both editors are live. The CSV input panel shows a sortable table preview of the parsed data so you can spot header or delimiter issues before converting.
Features
- ✓Bidirectional — edit either panel and the other updates in real time
- ✓Powered by csv-parse with automatic type casting (numbers, booleans)
- ✓First row treated as column headers
- ✓CSV input has interactive sortable table view
- ✓Handles comma, tab, and other delimiters via csv-parse auto-detection
- ✓Swap direction to JSON→CSV with a single click
- ✓JSON output has interactive tree view and graph visualization
- ✓Download converted JSON as a .json file
- ✓Copy output to clipboard in one click
- ✓Web Worker processing — never blocks the UI
- ✓100% client-side — data never leaves your browser
Common Use Cases
- Converting Excel or Google Sheets exports to JSON for API submission
- Parsing CSV log exports to JSON for analysis in JavaScript
- Transforming CSV database exports to JSON for NoSQL imports
- Converting CSV test data files to JSON for test frameworks
- Importing CSV survey results as JSON arrays for data processing
Frequently Asked Questions
QDoes the first row have to be a header?
Yes — the converter treats the first row as column headers. The resulting JSON objects use those header values as keys.
QAre numeric values cast to numbers?
Yes — csv-parse's automatic cast option converts numeric strings to JavaScript numbers and boolean strings (true/false) to JavaScript booleans.
QIs my data sent to a server?
No. All conversion runs in a Web Worker inside your browser.