CSV to JSON Converter
About CSV to JSON Converter
The CSV to JSON Converter transforms CSV (Comma-Separated Values) data into JSON format, making it easy to use spreadsheet data in web applications, APIs, and databases. The tool intelligently parses CSV data, handles quoted values, and can convert data to either an array of objects or array of arrays. All conversion happens in your browser, ensuring your data remains private and secure.
How to Use
- Paste or type your CSV data into the input field.
- Choose your CSV delimiter (comma, semicolon, tab, or pipe) from the dropdown.
- Check "First Row is Header" if your CSV has column names in the first row.
- Select output format: "Array of Objects" (with keys from headers) or "Array of Arrays" (raw data).
- Click "Table" to preview your CSV data in a formatted table view.
- The tool will automatically convert your CSV to JSON. Click "Download JSON" to save the file.
Frequently Asked Questions
What is the difference between "Array of Objects" and "Array of Arrays"?
Array of Objects creates a JSON array where each row becomes an object with keys from the header row (e.g., [{"name": "John", "age": 30}]). Array of Arrays creates a simple 2D array structure (e.g., [["John", 30], ["Jane", 25]]). Use objects for better readability and API compatibility, use arrays for simpler data structures.
How does the tool handle data types?
The converter automatically detects and converts data types. Numbers are converted to numeric types, "true"/"false" become booleans, "null" or empty values become null, and everything else remains as strings. This makes the JSON data more usable in applications without manual type conversion.
What if my CSV has quoted values with commas inside?
The tool properly handles quoted values according to CSV standards. Values enclosed in double quotes can contain commas, newlines, or other special characters. Escaped quotes (doubled quotes "") are also correctly parsed.
Can I preview my CSV data before conversion?
Yes! Click the "Table" button above the input area to view your CSV data in a formatted table with rows and columns. This helps verify that your delimiter and header settings are correct before converting to JSON.
What if my CSV doesn't have headers?
Uncheck "First Row is Header" and the tool will treat all rows as data. When outputting as Array of Objects, it will generate generic field names like "field1", "field2", etc. For Array of Arrays output, it simply converts each row to an array.
Which delimiter should I use?
The delimiter depends on your CSV file format. Most CSV files use commas, but European formats often use semicolons. Tab-delimited files are common for data exported from databases. If you're not sure, try the table preview with different delimiters to see which one correctly separates your data.
Is my data secure?
Yes! All conversion happens entirely in your browser. Your CSV data is never sent to any server, ensuring complete privacy and security. The tool works offline once loaded.