Opens .parquet files with a read-only table preview by default.
Shows file size, total rows, column count, row group count, and schema chips.
Supports drag resizing table columns.
Reads a configurable number of preview rows for a fast, compact preview.
Uses a dependency-free Parquet parser package and no webview framework.
Usage
Open a .parquet file from the Explorer. The extension manages the default open behavior and shows the read-only preview directly.
Settings
simpleParquetVisualizer.maxPreviewRows: maximum number of rows to read and display. Defaults to 500.
simpleParquetVisualizer.maxColumnWidth: maximum table column width in pixels for auto-fit and manual resizing. Defaults to 640.
simpleParquetVisualizer.maxCellLength: maximum text length to display in a preview cell before truncation. Defaults to 180.
Development
Run npm run compile when you want to rebuild the extension output. F5 does not run compilation automatically.
Run npm run samples to generate synthetic Parquet files under samples/ for local preview testing. The default F5 launch opens samples/preview.parquet; generate the samples once before using that launch target in a fresh checkout.
Limitations
Only local file URIs are supported.
The preview is read-only.
The built-in parser supports uncompressed and Snappy-compressed Parquet files. Other codecs may fail to open.
