Feather Viewer

View Apache Feather and Arrow IPC files directly in VS Code with schema inspection and paginated data tables.

Feather Data Viewer

Features

Schema Panel — View column names, data types, nullability, and file metadata at a glance
Paginated Data Table — Browse rows with configurable page sizes (50, 100, 500, 1000)
Compression Support — Reads uncompressed, LZ4, and ZSTD compressed Feather files
Theme-Aware — Automatically adapts to your VS Code light/dark theme
Multiple Formats — Opens .feather, .ftr, .arrow, and .ipc files

Supported File Types

Extension	Format
`.feather`	Apache Feather (Arrow IPC)
`.ftr`	Apache Feather (short)
`.arrow`	Arrow IPC
`.ipc`	Arrow IPC

Usage

Install the extension
Open any .feather, .ftr, .arrow, or .ipc file in VS Code
The file opens automatically in the Feather Viewer

The viewer displays:

A schema panel at the top showing column definitions and file statistics
A data table below with pagination controls for browsing rows

Building from Source

Prerequisites

Node.js 20+
pnpm 9+

Setup

git clone https://github.com/Ankvik-Tech-Labs/Feather.git
cd Feather
pnpm install

Build

pnpm run build        # Production build
pnpm run watch        # Watch mode (rebuilds on file changes)
pnpm run typecheck    # Type-check without emitting

Run in Development

Open the project in VS Code
Press F5 to launch the Extension Development Host
Open any .feather file in the new VS Code window

Package

pnpm run package      # Creates a .vsix file

Install the .vsix manually via:

code --install-extension feather-viewer-*.vsix

Install Locally After Changes

After making code changes, rebuild and reinstall in one go:

pnpm run build && npx vsce package --no-dependencies && code --install-extension feather-viewer-*.vsix

Then reload VS Code (Cmd+Shift+P → Developer: Reload Window) to pick up the new version.

Requirements

VS Code 1.85 or later

Known Limitations

Read-only viewer (no editing support)
Very large files (>1GB) may take a moment to parse initially

License

MIT