Free CSV Viewer — Open and Browse CSV Files Online

About the Free CSV Viewer

The FinancialDataTools.com CSV Viewer is a free, browser-based tool for opening, inspecting, and exporting CSV and TSV files. It runs entirely in your browser — no file is ever uploaded to any server.

Supported File Formats

Open any comma-separated (.csv) or tab-separated (.tsv) file. The viewer auto-detects the delimiter and handles quoted fields, embedded commas, and multiline values correctly.

Key Features

Browse rows and columns in a spreadsheet-style grid. Sort any column ascending or descending. Filter rows by column values or custom conditions. Export data to CSV, JSON, TSV, or Excel (.xlsx).

Privacy and Security

All file processing happens inside your browser using JavaScript. No file content is transmitted to any server. Your financial data stays private on your device.

How to Use the CSV Viewer

Click the Open button or drag and drop your CSV file onto the viewer. Your data appears immediately in the grid. Use the search box to find values. Click column headers to sort. Use the filter buttons for advanced filtering. Click Export to download in your preferred format.

Use Cases for Financial Data

Browse brokerage transaction exports in CSV format. Inspect bank statement downloads. Analyze stock price history files. Review trading strategy backtest output. Clean and re-export financial data to Excel for reporting.

Frequently Asked Questions

Is the CSV Viewer really free?

Yes, completely free with no signup required. All features are available at no cost.

Does my CSV file get uploaded to a server?

No. All processing is local in your browser. Nothing is uploaded.

What file formats does the CSV Viewer support?

CSV (.csv), TSV (.tsv), and plain text (.txt) with delimiter auto-detection.

How large a CSV file can I open?

Up to several hundred megabytes depending on your device. Large files are automatically paginated.