Data and text tool

CSV to JSON Converter

Convert CSV files or pasted CSV data to JSON instantly. Handles headers, quoted fields, commas in values, and custom delimiters. Runs in your browser.

How to use CSV to JSON Converter

Developer tools guide for csv to json converter users.

CSV and JSON are the two most common data exchange formats. CSV is compact and spreadsheet-friendly; JSON is what APIs and JavaScript applications expect. Converting between them is a daily task for developers, data analysts, and anyone working with exported data.

This tool handles the tricky cases: quoted fields that contain commas, newlines inside values, custom delimiters (semicolons, tabs), and optional header row detection.

What this tool does

Parses CSV data (with or without headers) and outputs clean JSON — either an array of objects (with headers) or an array of arrays (without).

How to use it

Paste CSV data or upload a .csv file. Toggle whether the first row is a header. Set the delimiter if not a comma. Click Convert and copy or download the JSON.

Edge cases handled

Quoted fields, commas inside values, line breaks inside quoted fields, semicolon and tab delimiters, and empty fields.

Quick checklist

Check if your CSV uses semicolons (common in European Excel exports) and set the delimiter accordingly.
If the first row is column names, enable 'First row is header' for object output.
Large CSV files (10,000+ rows) may take a moment — the tool processes everything in your browser.
Validate the JSON output before importing into a production system.

Answers

CSV to JSON Converter FAQs

What delimiter does this support?

Comma (default), semicolon, tab, and pipe. European Excel exports often use semicolons.

What if my CSV has commas inside field values?

Standard CSV wraps such fields in double quotes. This parser handles quoted fields correctly.

Is there a file size limit?

No server limit — the file is processed in your browser. Very large files (50MB+) may be slow depending on your device.

Can I go the other direction — JSON to CSV?

Yes — use the JSON to CSV tool.