CSV to JSON Converter
Convert CSV spreadsheet data to properly formatted JSON. Upload a file or paste CSV text directly.
All conversion happens in your browser. Your data is never sent to any server.
About CSV to JSON Converter
Konvity’s CSV to JSON converter turns spreadsheet data into clean, structured JSON, right in your browser. Paste CSV text directly, or upload a file, and choose comma, tab, semicolon, or a custom delimiter to match your data.
Turn the first row into object keys with the header row option, or export each row as a plain array without it. Toggle pretty-printed, indented JSON on or off, then copy the result or download it as a file. Everything runs on your own device: nothing is uploaded to a server.
This free CSV to JSON tool works the same way whether you need to convert CSV to JSON online once or use it every day: paste or upload, pick a delimiter, and copy or download the result. It doubles as a simple JSON formatter from CSV data, since the pretty-print option lays out nested objects with proper indentation instead of one long line of text. There is nothing to install and no account needed, so it works the same on a work laptop, a personal computer, or a shared machine where you cannot install software.
Common Use Cases
Turn a spreadsheet export into an API-ready format
Export data from Excel or Google Sheets as CSV, then convert it to JSON to use directly in an API request, a script, or a web application.
Import spreadsheet data into a database or app
Many databases, no-code tools, and apps accept JSON more easily than CSV. Convert your CSV export into JSON before importing it.
Convert tab-separated or semicolon-separated data
Not every export uses commas. Choose tab, semicolon, or a custom delimiter to correctly parse files that come from different regions or tools.
Test and debug data without writing a parser
Paste a sample of your CSV data to quickly see what the resulting JSON structure will look like, before writing any code to handle it.
Convert a CSV without headers into an array of rows
If your CSV file has no header row, turn off the header option to get each row back as a plain array instead of a named object.
Prepare data for JSON-based configuration files
Convert a list maintained in a spreadsheet into JSON so it can be used directly in a config file, a static site generator, or a JSON-based data store.
Frequently Asked Questions
What CSV formats are supported?
Standard comma-separated (CSV), tab-separated (TSV), and semicolon-separated values are all supported. You can also set a custom delimiter.
How does the header row option work?
When "Has Header Row" is enabled, the first row of your CSV becomes the keys in each JSON object. Without it, each row becomes an array of values.
Can I paste CSV text directly?
Yes! You can either upload a CSV file or paste your CSV data directly into the text input area.
Is there a row limit?
There is no hard limit. The tool can handle large CSV files, but very large files (millions of rows) may be slow depending on your device.
Is this CSV to JSON tool really free?
Yes. This online CSV tool is completely free to use, with no account, no watermark, and no limit on how many times you convert data.
Does the converter handle quoted fields and special characters?
Yes. Fields wrapped in quotes are parsed correctly, including ones that contain the delimiter character itself or an escaped quote character written as "".