CSV to JSON Converter
Convert CSV data to JSON format instantly. Paste your CSV with headers and get an array of JSON objects. Supports comma, tab, and semicolon delimiters. Runs in your browser — no data uploaded.
How CSV to JSON Conversion Works
The first row of your CSV is treated as headers, which become the keys in each JSON object. Every subsequent row is mapped to a JSON object where each cell value is assigned to its corresponding header key. The final result is a JSON array of objects. Values are preserved as strings; quoted fields with embedded commas or newlines are handled correctly. The tool supports comma, tab, semicolon, and pipe delimiters to cover exports from different spreadsheet applications and databases.
Conversion Logic
CSV: name,age / Alice,30 / Bob,25
JSON: [{"name":"Alice","age":"30"},{"name":"Bob","age":"25"}]
Supported Delimiters and Formats
Not all CSV files use commas. European systems often export with semicolons, databases may produce tab-separated values (TSV), and some log formats use pipes. Select the matching delimiter before converting to ensure columns are split correctly. The tool strips surrounding double quotes from field values and trims whitespace. For best results, ensure your CSV has consistent column counts across all rows and that the first row contains meaningful header names, as these become your JSON property keys.
Common Use Cases for CSV to JSON
Converting CSV to JSON is essential when importing spreadsheet data into web applications, REST APIs, or NoSQL databases like MongoDB that expect JSON documents. It is also useful for front-end developers who need mock data in JSON format from an existing Excel export, or for data engineers transforming flat files into structured payloads. Since everything runs in your browser, you can safely convert files containing sensitive data without uploading anything to a third-party server.