Free CSV Viewer Online
View, filter, sort, and transform CSV files directly in your browser. The best free online CSV viewer with 30+ operations. No upload required. Powered by DuckDB.
Everything You Need to View and Explore CSV Files
Drag and drop
Open any .csv or .tsv file instantly. Auto-detects delimiters, headers, and column types.
Column statistics
View histograms, value distributions, min/max/mean for every column automatically.
Filter and sort
Filter rows by value, range, or date. Sort ascending or descending on any column.
SQL queries
Run full SQL queries on your CSV data using DuckDB, a real SQL engine in your browser.
Transform and export
Apply 30+ operations: aggregate, pivot, join, add columns. Export results as CSV.
100% private
Your CSV file never leaves your browser. No upload, no server, no tracking.
How It Works
Drop your .csv
Drag a CSV file onto the page.
Explore instantly
Browse columns, view statistics, filter and sort.
Transform and export
Apply operations, build pipelines, export as CSV.
Frequently Asked Questions
How do I open a CSV file online?
Go to exploremydata.com/app and drag your CSV file onto the page. It opens instantly in your browser.
Is my CSV data uploaded to a server?
No. ExploreMyData processes everything locally in your browser using DuckDB WASM. Your data never leaves your device.
Can I run SQL on a CSV file?
Yes. ExploreMyData uses DuckDB, a full SQL engine, running entirely in your browser. You can write SQL queries or use the visual operation picker.
What's the maximum CSV file size?
File size is limited by your browser's memory. Most browsers handle files up to several hundred MB. DuckDB processes millions of rows efficiently.
Learn More
Ready to explore your CSV data?
No sign-up, no upload, no tracking. Just open your file and go.
Start Exploring, It's Free