CSV to JSON Converter
Paste your CSV data below to convert it into JSON format. Supports quoted fields with commas inside.
About CSV to JSON Converter
This free online tool converts CSV (Comma-Separated Values) data into JSON format instantly in your browser. No data is sent to any server — everything runs locally. It properly handles quoted fields containing commas and escaped quotes. Use it to convert spreadsheet exports, database dumps, or any tabular data into JSON for APIs, configurations, or further processing.
How to Use
- Paste your CSV data into the input area on the left.
- Check or uncheck First row is header depending on whether your first row contains column names.
- Click Convert to generate the JSON output.
- Click Download to save as a .json file, or Copy to copy to your clipboard.
Frequently Asked Questions
What happens if my CSV has no header row?
Uncheck the “First row is header” option. The tool will output a JSON array of arrays, where each inner array represents one row of values.
How are quoted fields handled?
Fields enclosed in double quotes are parsed correctly, even if they contain commas or newlines. Escaped quotes (two consecutive double quotes) are converted to a single double quote in the output.
Is my data safe?
Yes. All processing happens entirely in your browser. No data leaves your machine, making this tool safe to use with sensitive or confidential information.
What CSV delimiters are supported?
Currently, this tool supports comma-separated values. If your data uses tabs or semicolons as delimiters, replace them with commas before converting.
Can I convert large CSV files?
Since processing is done in the browser, performance depends on your device. Most files up to several megabytes convert instantly. For very large files, consider splitting them into smaller chunks.