CSV Input
Paste CSV text or drag and drop a .csv file here.
Quoted fields with commas, newlines, and escaped "" quotes are parsed correctly.
Free Conversion Tool
Free CSV to JSON Converter
A CSV to JSON converter is a tool that turns comma-separated spreadsheet rows into structured JSON your code can read. Use this free CSV JSON converter to paste or upload CSV, choose a delimiter and header row, and copy clean JSON instantly.
Supports custom delimiters, quoted fields with embedded commas and newlines, and output as an array of objects or array of arrays. Pair it with NitroClaw's JSON Formatter and JSON to YAML Converter for a complete data-cleanup workflow.
Custom delimitersRFC 4180 quoted fieldsArray of objects or arraysClient-side conversion
Convert CSV to JSON instantly
Paste CSV on the left or drop a .csv file. Tweak the delimiter, header, and output shape. JSON updates as you type.
JSON Output
Array of objects keyed by your headers.
JSON regenerates automatically when you change the CSV or any option.
All conversion happens in your browser. No CSV data is ever uploaded to a server.
How to convert CSV to JSON
1
Paste or upload your CSV
Drop a .csv file into the input panel or paste CSV text directly. You can also load a sample dataset to see how the converter formats output.
2
Pick your delimiter and header option
Choose comma, tab, semicolon, pipe, or a custom character. Toggle the header row option if your first line contains column names you want as JSON keys.
3
Choose the JSON output shape
Switch between array of objects and array of arrays, then pick 2-space or 4-space indentation for the formatted JSON output.
4
Copy or download the JSON
Use Copy to push the JSON to your clipboard or Download to save a .json file you can drop straight into your project, API mock, or seed script.
Frequently Asked Questions
What is a CSV to JSON converter?
A CSV to JSON converter transforms tabular comma-separated values into structured JSON. Each CSV row becomes a JSON object whose keys come from the header row, making spreadsheet data easier to consume in APIs, scripts, and configuration files.
Does this converter support custom delimiters like tabs or semicolons?
Yes. You can switch between comma, tab, semicolon, pipe, or any custom single-character delimiter. This is useful for European CSV exports that use semicolons or TSV files exported from spreadsheets and databases.
How does it handle quoted fields with commas or newlines?
The parser respects RFC 4180 style quoting. Fields wrapped in double quotes can contain the delimiter, line breaks, and escaped double quotes written as two consecutive quotes. The result is clean JSON even for messy real-world CSV exports.
Is the conversion done in the browser or sent to a server?
Everything runs client-side in your browser. Your CSV data never leaves your machine, which makes the tool safe for sensitive exports such as customer lists, financial records, or internal analytics.
Can I get an array of arrays instead of an array of objects?
Yes. Toggle the output format option to switch between an array of objects keyed by the header row and a raw array of arrays where each row is a positional list. Array of arrays is handy when column names are not stable or when you need to preserve order.