Open Big CSV Files in Your Browser (Hundreds of MB)
Excel struggles with very large CSV files. Open huge CSVs in your browser to search, sort and page through rows, without uploading them anywhere.
Open the free Large CSV Viewer →What is the Large CSV Viewer?
Open big CSV files (hundreds of MB) in your browser: search, sort and page through rows without Excel. It's completely free, needs no sign-up and works on any phone or computer.
Why it's helpful
- Handles very large files
- Search and sort
- Private: files stay on your device
Who it's for
Data analysts, developers and anyone receiving big exports.
How to use it
- Choose a CSV file. It is read on your device, never uploaded.
- Search across all columns, click a header to sort, and page through the rows.
💻 Open source: this tool is free and open source (MIT License). View the code on GitHub, download it and run it offline.
The bigger picture: Excel & CSV
Spreadsheets still run most offices. Cleaning data, converting formats and understanding formulas are daily tasks that eat hours; the right tool turns them into seconds.
What's changing: Excel and Google Sheets keep adding powerful functions like XLOOKUP, FILTER and LET, plus AI helpers. Knowing the fundamentals makes those features far more useful.
Frequently asked questions
How big can the file be?
Files of a few hundred MB work on most laptops. Phones have less memory.
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