About CSV Viewer
Open, explore, search, and inspect large CSV and TSV spreadsheets directly in your browser with zero file upload. Features instant column statistics (Sum, Average, Min, Max, Median), formula evaluation, and dual Desktop Grid or Mobile Cards views.
Key Capabilities & Features
- Instant client-side parsing of large CSV and TSV files with zero server latency
- Live Quick Column Stats Ribbon: instant Sum, Average, Min, Max, Median, Count, and Unique Count upon column selection
- Formula Evaluation Bar supporting =SUM(), =AVG(), =MIN(), =MAX(), =COUNT(), =MEDIAN(), and =UNIQUE() with 1-click summary row append
- Dual responsive layout: Desktop Spreadsheet Grid and touch-optimized Mobile Cards View
- Multi-format export toolbar: genuine binary Excel (.xlsx), CSV, TSV, JSON, SQL INSERT, and Markdown
- Real-time instant search filtering across all columns and rows with clickable header sorting
- 100% private in-browser processing with zero data uploads or cloud tracking
How to Use CSV Viewer
Open CSV File
Click 'Open CSV/TSV' to select a spreadsheet from your device, or paste raw delimited text.
Inspect & Analyze
Click any column header to view live statistics (Sum, Avg, Min, Max, Median) or run spreadsheet formulas.
Switch Views & Export
Toggle to Mobile Cards View on phones or export directly to genuine Excel (.xlsx), CSV, JSON, or SQL.
Privacy & In-Browser Execution Guarantee
100% client-side privacy. All calculations, parsing, and charting execute locally in your browser with zero server uploads.
Frequently Asked Questions
Are my confidential spreadsheets uploaded to any server?
Never. All spreadsheet parsing, formula evaluations, and rendering happen 100% locally inside your web browser's memory.
Can I calculate column sums and averages in CSV files?
Yes! Click any column header to immediately see Sum, Average, Min, Max, Median, and Unique count, or use the Formula Evaluator bar.
Does this work smoothly on mobile phones and tablets?
Yes! The viewer includes a dedicated 'Mobile Cards' view optimized for touchscreens and small displays, avoiding awkward horizontal table squishing.