CSV Table Viewer

Open CSV and TSV files as read-only, searchable tables in VS Code.

Features

• Opens .csv and .tsv files in the table editor by default.
• Filters across every displayed cell.
• Filters individual columns by checking values from each column's distinct-value list.
• Clears the open column's filter without changing the global search or filters on other columns.
• Clears all active filters from the table toolbar.
• Select all in a searched value list selects only the matching values and deselects the rest.
• Sorts columns through unsorted, ascending, and descending states.
• Resizes columns by dragging a header edge, with arrow-key adjustment and double-click reset.
• Keeps headers visible while scrolling in either direction.
• Uses virtual rows so large previews do not create an unbounded DOM.
• Refreshes after external file changes without discarding valid filter or sort state.
• Follows the active VS Code light, dark, or high-contrast theme.

Use the text-lines button in the toolbar or Reopen Editor With... > Text Editor to inspect the raw source. The table viewer never writes to the file.

Supported files

The viewer supports comma-delimited CSV and tab-delimited TSV with quoted fields, escaped quotes, embedded newlines, UTF-8, BOM-marked UTF-16LE/BE, and a Windows-1252 fallback.

V1 previews files up to 10 MiB and the first 50,000 data rows. A visible notice identifies truncated previews and fallback decoding. Filtering and sorting apply to the displayed preview.

Configurable delimiters, editing, full large-file indexing, type inference, and saved layouts are outside the first version.

Build and install

Requirements: Node.js 20 or later, npm, PowerShell, and the code command on PATH.

.\scripts\Build-Extension.ps1
.\scripts\Install-Extension.ps1

Reload VS Code after installing. The packaged extension is written to dist\csv-table-viewer-vscode-0.1.3.vsix.

Development

npm install
npm test
npm run package

Runtime code uses the stable VS Code custom editor API and Papa Parse. The webview has a nonce-based Content Security Policy and renders CSV values with textContent.