koryboc/ImageToIcon 26.7.19

2026-07-19

on GitHub

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Description

ImageToIcon is a small cross-platform tool for turning any image into a multi-size Windows .ico file. Drop in a single picture and it generates all the standard icon sizes at once, with clean Lanczos‑3 downscaling — no wizard, no upsell, no bundle of proprietary editors.

Version Highlights

• Full rewrite as a cross-platform Avalonia app on .NET 10 — no more WinForms, one binary for Linux and Windows
• Read .ico, .exe and .dll files as input and pull their embedded icon frames
• Load .svg files directly — vector sources are rasterised on the fly via Skia
• Custom sizes from 2–4096 px can be freely added, edited or removed from the size bar with a right-click
• Windows 11 default sizes (256, 64, 48, 40, 32, 24, 20, 16) are pre-selected and can be toggled on or off, but not removed
• Non-square sources keep their aspect ratio and are centred with transparent padding instead of being stretched
• Window keeps itself inside the working area and wraps its controls so nothing gets pushed off-screen
• Program icons improved
• In-app self-update: an orange button appears when a newer release is on GitHub, shows the version highlights, then downloads the matching archive with a progress dialog and restarts into the new build

Additional Features

• No requirements: runs natively on Linux and Windows — same binary logic, same output
• Load any common raster format: .png, .jpg, .bmp, .tif, .gif, .webp, .tga, .qoi, .pbm/.pgm/.ppm/.pnm
• High-quality Lanczos-3 resampling for sharp results at every size
• Drag-and-drop support on the main window and on individual thumbnails
• CLI mode for batch conversion and scripting — process a folder of images in one call
• .png-compressed frames inside the .ico container for smaller files, especially at 256 px and up

Supported File Types

Requirements

• Linux (x64) or Windows 10+ (x64)
• No runtime required — ships as a self-contained single-file executable