convert-csv.com logo convert-csv.com

Pivot Tool

Summarize and reshape CSV data with a client-side pivot table builder.

100% Secure - your files are processed in your browser and never sent to a server.
Drop your file hereor click to browseSupports CSV, TSV, or TXT files (.csv, .tsv, .txt) (Max 100MB)

How to use the Pivot CSV tool

  1. Load your CSV data: Drag and drop your CSV file, choose a file from your file explorer, or paste CSV data directly into the paste area.
  2. Configure input settings: Select the CSV delimiter to correctly parse your data.
  3. Define pivot fields: Enter the Row Grouping field (Y-axis), Column Grouping field (X-axis), and Aggregation Value Field to summarize.
  4. Choose aggregation metric: Select the calculation to apply: Sum, Count, Average, Minimum, or Maximum.
  5. Build and export: Click the "Build Pivot Table" button to generate the summary, then copy or download the result.

Frequently asked questions

Is it safe to use Pivot CSV with sensitive or confidential data?
Yes, completely. All processing done by Pivot CSV runs 100% client-side inside your local web browser using a background Web Worker thread. Your data is never uploaded, transmitted, or stored on any server, not even temporarily.
What is the maximum file size Pivot CSV can handle?
Pivot CSV supports files up to 100 MB. Because all parsing happens inside your browser's memory rather than on a server, performance scales with your computer's available RAM. The Web Worker architecture keeps the UI fully responsive even during heavy processing.
How does Pivot CSV process my data without uploading it?
Pivot CSV uses modern browser File and Blob APIs alongside battle-tested open-source libraries (such as PapaParse and SheetJS) bundled directly into the page. When you load a file or paste data, the browser reads it into local memory and the conversion runs entirely inside a sandboxed Web Worker thread. No network call is ever made.
Do I need to install anything to use Pivot CSV?
No installation, browser extension, or plugin is required. Pivot CSV runs as a standard web page inside any modern browser. Simply open it, load your data, and download the output. Nothing to install and nothing to uninstall.
Does Pivot CSV work offline after the page has loaded?
Yes. Once Pivot CSV has finished loading in your browser, the conversion engine itself requires no active internet connection. You can disconnect from the network and continue converting files; all processing stays fully on-device.

Related tools