A CSV to JSON converter transforms comma-separated values into structured JSON data your code can consume directly. Whether you are importing spreadsheet data into a web app, preparing data for an API, or transforming a database export, this tool converts CSV to JSON instantly in your browser — no upload, no server, no signup required.
CSV Input
JSON Output
JSON output will appear here...
How to Convert CSV to JSON
CSV (Comma-Separated Values) is the universal format for tabular data — spreadsheets, database exports, and data pipelines all use it. JSON is what web APIs and modern applications consume. Our free CSV to JSON converter bridges the gap instantly, right in your browser.
Step 1: Paste Your CSV Data
Open your CSV file in any text editor, copy the contents, and paste them into the CSV Input area. Alternatively, you can type CSV data directly. The tool accepts any amount of CSV data — from a few rows to thousands.
Step 2: Choose the Delimiter
Select the delimiter that matches your file. Most exports use commas, but European locales often default to semicolons since commas are used as decimal separators. Tab-separated values (TSV) are common exports from Excel and Google Sheets. Pipe-delimited files appear in some database and log formats.
Step 3: Configure the Header Row Option
Enable "Has header row" if your first CSV row contains column names (the most common case). The CSV to JSON converter will use these as JSON property keys, producing an array of objects like {"name":"Alice","age":"30"}. Disable it for raw data without headers — you will get an array of arrays instead.
Step 4: Click Convert
Hit the Convert button (or the conversion runs live as you type). The record count and field count appear instantly so you can verify the parser found the right number of rows and columns. If something looks wrong, double-check the delimiter setting.
Step 5: Copy or Download
Use the Copy button to place the JSON on your clipboard for pasting into code, an API client, or a config file. Use Download to save the JSON as a .json file. The output is formatted with 2-space indentation for readability.
Handling Quoted Fields and Special Characters
The parser handles RFC 4180-compliant CSV, including fields wrapped in double quotes that contain commas, newlines, or escaped double-quote characters. This means you can safely convert real-world CSV exports from Excel, Google Sheets, or database tools without pre-processing.
FAQ
Is the CSV to JSON converter free?
Yes, completely free with no usage limits, no account required, and no data sent to any server. All conversion happens in your browser.
Is my CSV data private and secure?
Absolutely. Your CSV data never leaves your browser. The conversion runs entirely in client-side JavaScript, so nothing is uploaded or stored on any server.
What delimiters does this CSV converter support?
The tool supports comma (,), tab, semicolon (;), and pipe (|) delimiters. Select the correct delimiter before converting — choosing the wrong one is the most common cause of misformatted output.
What is the difference between header row and no header row?
When 'Has header row' is enabled, the first row becomes the JSON object keys and subsequent rows become values, producing an array of objects like [{"name":"Alice","age":30}]. With no header row, the output is an array of arrays like [["Alice",30]].
Can I convert large CSV files with this tool?
Yes, the tool handles CSV data directly in the browser. For very large files (hundreds of MB), browser memory limits may apply. Paste the data directly into the text area — file upload is not required.
How are quoted fields handled?
The parser handles RFC 4180-compliant CSV, including quoted fields that contain the delimiter character, newlines, or double-quote characters escaped as two double quotes.
Can I download the converted JSON output?
Yes. Click the Download button after converting to save the JSON as a .json file directly to your computer.