CSV to JSON Converter Online Free
Convert tabular CSV data to JSON arrays and vice versa.
CSV Data
JSON Data
Effortless Data Transformation
Data exists in many forms, and developers often need to move it between spreadsheet formats like CSV and machine-readable formats like JSON. Our free online CSV to JSON converter provides a seamless, two-way bridge for your data. Whether you're importing a spreadsheet into a database or exporting data for a report, metatool.in ensures your transformation is accurate and fast.
Two-Way Conversion Features
- CSV to JSON: Automatically converts your spreadsheet rows into an array of JSON objects. Our parser is smart enough to detect numeric values and booleans, ensuring your JSON output is ready for use in any application.
- JSON to CSV: Takes your JSON arrays and flattens them into a clean CSV format. Perfect for when you need to view API results in Excel or Google Sheets.
- Custom Delimiters: Not all CSVs are created equal. We support commas, semicolons, and tabs to handle data from various regions and software versions.
Designed for Large Datasets
We've optimized our conversion algorithms to handle large amounts of data without crashing your browser. Because the processing is done locally using JavaScript's powerful string manipulation and parsing capabilities, it's significantly faster than tools that require a round-trip to a server.
Frequently Asked Questions
The JSON should be an array of objects (e.g., [{"id": 1, "name": "John"}, {"id": 2, "name": "Jane"}]). Nested objects will be converted to stringified JSON within the CSV cell.
You can use Commas (default), Semicolons, or Tabs. Choosing the correct delimiter is important if your data contains commas within the text fields.
Yes, this tool can handle thousands of rows efficiently. However, extremely large files (50MB+) might cause the browser tab to slow down briefly during the transformation.
Yes. All data transformation happens client-side. We do not store or transmit your CSV or JSON data to any server.
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