Create Pivot Tables from CSV Files Online

Large CSV Viewer lets you create pivot tables from any CSV file directly in your browser. Select a grouping column (e.g. region), a value column (e.g. revenue), and an aggregation function (SUM, COUNT, AVG, MIN, MAX) to generate an aggregated summary table. Download the pivot result as CSV or Excel. Free, no account required.

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Build pivot tables from any CSV file online for free. Group, aggregate, and summarize CSV data without Excel. No install, no account needed.

Excel pivot tables are powerful but require installing Office and manually configuring fields. Large CSV Viewer's pivot table builder lets you group, aggregate, and summarize your CSV data in the browser — select your row grouping, value column, and aggregation, and your pivot table generates instantly.

Key features

  • Group rows by any column (region, category, date, etc.)
  • Aggregate values with SUM, COUNT, AVG, MIN, or MAX
  • No Excel or Google Sheets required
  • Download pivot results as CSV or Excel

How it works

  1. Upload your CSV. Open your data file in the viewer. Any file size is supported.
  2. Configure the pivot. Open the Pivot Table panel. Select the grouping column (rows), the value column to aggregate, and the aggregation function (SUM, COUNT, AVG, MIN, MAX).
  3. Export the summary. Your pivot table generates instantly. Download the aggregated result as CSV or Excel from the File menu.

Ready to try it?

Free, instant — no account or install needed.

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Frequently asked questions

What is a CSV pivot table?

A pivot table groups your CSV rows by a category column and aggregates a value column — for example, summing revenue by region or counting orders by product category.

What aggregation functions are supported?

SUM, COUNT, AVG (average), MIN, and MAX. These run server-side using DuckDB's SQL aggregation engine.

Can I create a pivot table from a large CSV file?

Yes. Pivot aggregations run server-side using DuckDB on the full dataset, regardless of file size.

Is the CSV pivot tool free?

Yes, completely free. No account, no file size limit, no paywall.

How is a pivot table different from sorting and filtering?

Sorting and filtering return rows from your original data. A pivot table aggregates rows — collapsing many rows into summary statistics grouped by a category.