Icon Viewer

A native Crystal GUI for browsing Radix, Fluent, Octicons, Eva, and Ionicons, built with UIng.

Choose a collection and size/style variant, search by name, then preview an icon and copy its Crystal constant. The default Grid view lets you scroll through all matching icons without changing pages. Click an icon to preview it, or navigate with the arrow keys, Home, and End. Use Grid density to choose 4, 6, 8, or 10 columns to suit your window size. Thumbnails are decoded on demand and kept in a bounded cache for large collections.

Switch to List for the original name-and-icon table, paged in groups of 256. The selected icon is preserved when switching views. Search and collection/variant filters apply to both views.

Screenshots

Screenshots are refreshed when a release is built.

Linux	Windows	macOS

Download

Download the archive for your platform from Releases:

• Linux x64: Extract icon-viewer-linux-x64.tar.gz and run icon-viewer. GTK 3 must be installed.
• Windows x64: Extract icon-viewer-windows-x64.zip and run icon-viewer.exe.
• macOS Apple Silicon: Extract icon-viewer-macos-arm64.zip and open IconViewer.app. The app is not notarized. If macOS blocks it, use System Settings → Privacy & Security → Open Anyway after the first launch attempt.

Run

Install Crystal and the platform prerequisites for UIng, then:

shards install
shards build
./bin/icon-viewer

The UIng shard downloads a libui-ng binary during installation.

Adding a collection

Add its shard to shard.yml and call its compile-time catalog macro in src/icon_catalog.cr. The collection and variant selectors update automatically.

License

Application code: MIT. Icon shards retain their own licenses.