CSV to JSON Converter – Convert CSV to JSON Online Free
About the CSV to JSON Converter
The CSV to JSON Converter transforms spreadsheet data into clean, structured JSON. Paste your CSV directly, load it from a file, or fetch it from a live URL, and the tool automatically detects the field separator, parses your rows, and outputs properly formatted JSON — as standard objects, a keyed object, a raw array, or a column-based array, depending on what your project needs.
This tool is built for developers and analysts who need to feed spreadsheet exports into APIs, JavaScript applications, or databases that expect JSON. If you’re working with the reverse direction, converting API data back into a spreadsheet, use the JSON to CSV Converter. And once your JSON output is ready, you can remove any duplicate rows beforehand with the Remove Duplicate Lines tool.
We tested this converter with CSV files using different delimiters, quoted values, and Unicode characters to help ensure the JSON output stays accurate across every supported format.
How to Use the CSV to JSON Converter
- Paste your CSV into the CSV Input box, or load it from a file or a live URL.
- Choose a Field Separator, or leave it on Auto Detect.
- Set Limit # of Lines or Skip # of Lines if you only need part of the file.
- Enable options like First row is column names, Trim whitespace, or Ignore empty lines as needed.
- Choose an output format: CSV to JSON, CSV to Keyed JSON, CSV to JSON Array, or CSV to JSON Column Array.
- Click Copy JSON or Download .json to save your converted file.
Example Usage
Input:
id,name,email 1,John,[email protected] 2,Jane,[email protected]
Output (CSV to JSON):
[
{ "id": "1", "name": "John", "email": "[email protected]" },
{ "id": "2", "name": "Jane", "email": "[email protected]" }
]
Each row becomes a JSON object using the header row as keys, ready to use directly in code or an API request.
If you need to work with JSON in other ways, try our JSON to CSV Converter to convert it back into a spreadsheet, Remove Duplicate Lines to clean your data before converting, or Text Diff Checker to compare different JSON outputs.
Frequently Asked Questions
“CSV to JSON” creates an array of objects using headers as keys. “Keyed JSON” uses the first column’s value as the object key. “JSON Array” keeps rows as raw arrays including the header row. “Column Array” groups all values by column instead of by row.
Yes, with “Auto Detect” selected, the tool analyzes the first line and picks the most likely separator (comma, semicolon, tab, etc.) automatically.
Yes, enter the file URL in the “Fetch from URL” field and click “Fetch URL.” Note that the source server must allow CORS requests for the fetch to succeed.
This option disables special handling of quote characters, treating them as literal text within fields instead of using them to wrap values containing separators.
Yes, this tool is completely free with no signup required.
