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PixConvert

A Windows image converter for batch conversion, presets, and mixed static/animated image workflows.

Platform Framework Language Language

Quick Start

  1. Download the latest zip package from GitHub Releases.
  2. Extract the zip file to a writable folder.
  3. Run PixConvert.exe.
  4. Add files or folders to the list.
  5. Configure or select a conversion preset.
  6. Start conversion and check the output files.

For runtime use, keep PixConvert.exe and libvips-42.dll in the same folder. The release zip also includes LICENSE and THIRD-PARTY-NOTICES.md for license and redistribution notices.

Highlights

  • Batch convert up to 10,000 image files.
  • Handle static images and supported animated images in one list.
  • Detect the actual image format from file signatures instead of relying only on extensions.
  • Show files whose extension and detected format do not match.
  • Reuse conversion settings with presets.
  • Control CPU usage while conversion is running.
  • Choose how output conflicts are handled: overwrite, skip, or add a suffix.
  • Keep settings, presets, and logs inside the application folder for zip-based distribution.

Screenshots

Before Conversion

File list view

Converting

Conversion progress view

Supported Formats

Type Formats
Static images JPEG, PNG, BMP, WebP, AVIF
Animated images GIF, WebP

Conversion Engines

PixConvert uses two conversion engines depending on the target workload.

SkiaSharp is a .NET graphics library based on Google's Skia 2D graphics engine.

PixConvert uses SkiaSharp for static image conversion: JPEG, PNG, BMP, and static WebP.

BMP cannot be saved through the normal SkiaSharp encoding path, so PixConvert uses an internal BmpEncoder. It writes the converted pixels as an uncompressed 24-bit bitmap, and images with transparency are first composited over the configured background color.

NetVips is a .NET binding for libvips, a high-performance C image processing library.

PixConvert uses NetVips for high-compression and multi-frame workloads: AVIF, animated GIF, and animated WebP.

AVIF and animated images have more encoding options and higher processing cost, so they are routed through NetVips. PixConvert uses it for AVIF compression options and frame-based GIF/WebP animation output.

Development

  • Language: C#
  • Framework: .NET 10.0
  • UI: WPF with ModernWPF
  • Core libraries: SkiaSharp, NetVips, CommunityToolkit.Mvvm, Serilog
  • Tools: Antigravity, VS Code, Visual Studio, Claude Desktop
  • AI: Gemini, Codex, Claude
  • Devlog: Shortcut

Build from source:

dotnet build src\PixConvert.csproj -c Release

License

PixConvert is licensed under the terms in LICENSE. Third-party notices for redistributed dependencies are listed in THIRD-PARTY-NOTICES.md.