CSV Grid Viewer

April 12, 2026 ยท View on GitHub

A simple VS Code extension that opens .csv files in a grid UI and calculates the sum of selected numeric cells.

Features

  • Grid view with row/column headers
  • Click-to-select cells
  • Live count of selected cells
  • Live sum of selected numeric values
  • "Clear Selection" action

Run Locally

  1. Install dependencies:
    • npm install
  2. Compile:
    • npm run compile
  3. Launch extension development host:
    • Press F5 in VS Code
  4. Open a CSV file and run:
    • CSV: Open Grid View

You can also trigger the same command from the editor title bar or file explorer context menu for CSV files.

Publish

Use the publishing workflow in PUBLISHING.md:

  1. npm run publish:init -- --publisher <publisher-id> --repo <https://github.com/<user>/<repo>.git>
  2. npm run publish:login -- <publisher-id>
  3. npm run package:vsix
  4. npm run publish:extension