CSV Viewer & Editor

About CSV Viewer & Editor

CSV Viewer & Editor is a powerful online tool that lets you view, edit, and manipulate CSV (Comma-Separated Values) files directly in your browser. Load CSV files, modify data in a spreadsheet-like interface, add or remove rows and columns, and export to CSV or JSON format—all without uploading sensitive data to a server.

What is a CSV file?

CSV (Comma-Separated Values) is a simple text file format used to store tabular data. Each line represents a row, and columns are separated by delimiters (usually commas). CSV files are widely used for data import/export in spreadsheet applications, databases, and data analysis tools.

Does my data leave my device?

No. All CSV parsing and editing happens locally in your browser using JavaScript. Your data never leaves your machine, ensuring complete privacy for sensitive information like customer lists, financial data, or confidential reports.

Can I edit CSV data?

Yes. Enable Edit Mode to modify cell values, add new rows, add new columns, or delete existing rows and columns. Click any cell to edit its content. Changes are applied in real-time and can be downloaded as a new CSV file.

What delimiters are supported?

The tool supports common delimiters: comma (,), semicolon (;), tab (\t), and pipe (|). You can also use Auto-detect to let the tool determine the delimiter automatically, or specify a custom delimiter for special cases.

Can I export to different formats?

Yes. You can download your CSV data as a CSV file (with your chosen delimiter) or export it as JSON format. JSON export converts rows to objects, making it easy to use the data in web applications and APIs.

How do I add rows and columns?

Enable Edit Mode, then use the 'Add Row' button to append a new row at the end of the table, or 'Add Column' to add a new column. You can then edit the cells to fill in your data.