How to use the CSV to JSON Converter
Convert CSV to JSON in 4 steps:
1
Paste or upload your CSV
Paste CSV content directly or click Upload CSV to select a .csv file from your device. The file is processed entirely in your browser — nothing is sent to a server.
2
Set the delimiter
Choose comma, semicolon, tab, or pipe as the column separator. The tool auto-detects the most common case.
3
Configure options
Toggle Header Row to treat the first row as JSON keys, or disable it to generate column1, column2 names. Toggle Auto-detect Types to convert numeric strings to numbers and true/false strings to booleans.
4
Copy or download JSON
Click Convert to get a formatted JSON array. Copy to clipboard or download as a .json file.
When to use this tool
Use CSV to JSON Converter when you need to:
- →Convert an Excel or Google Sheets export to a JSON array for use in a web application or API
- →Transform a CSV database export into JSON for import into a JSON-based system or NoSQL database
- →Convert a product catalog CSV from a client into a JSON array for your REST API
- →Process analytics or reporting CSV files into JSON for visualization or further transformation
- →Quickly validate a CSV structure by viewing it as a JSON array during development
Frequently asked questions
Q:What CSV structure does this tool require?
Any standard CSV with rows of comma-separated (or delimiter-separated) values. By default, the first row is treated as headers that become the JSON object keys. Each subsequent row becomes one JSON object in the output array. There is no required format beyond that.
Q:What happens if the CSV has no header row?
Disable the 'Header row' toggle. The tool generates automatic column names — column1, column2, column3, and so on — and uses them as JSON keys. Every row including the first becomes a data object in the output array.
Q:How are data types handled in the JSON output?
With 'Auto-detect types' enabled, numeric strings like '42' or '3.14' are converted to JSON numbers, and the strings 'true' and 'false' are converted to JSON booleans. Empty cells become null. With auto-detection off, all values remain strings.
Q:Can I convert a CSV with commas inside cell values?
Yes. The parser handles RFC 4180-compliant quoted values — a cell like "Smith, John" is correctly parsed as a single value containing the comma, not split into two columns.
Q:Can I upload a .csv file directly instead of pasting?
Yes — click the Upload CSV button to select a .csv or .txt file from your device. The file is read and processed entirely in your browser using the FileReader API. No data is uploaded to any server.
Q:What delimiters are supported besides commas?
Comma (,), semicolon (;), tab (\t), and pipe (|) are all supported. Semicolon-delimited files are common in European Excel exports where commas are used as decimal separators. Tab-delimited files (.tsv) are common exports from databases and BI tools.