QConvert

Fast image conversion and resizing straight from the Windows Explorer context menu, by Code-iX.

Right-click an image, open the QConvert submenu, pick an action — a converted copy appears next to the original. No window, no wait.

• Convert: PNG, JPG/JPEG, WebP, AVIF, and ICO to supported output formats
• Resize to fit: scales down (never up) to fit inside a box, keeping the aspect ratio
• Crop to size: scales (up or down) to cover an exact size, then center-crops — the result is exactly that size (e.g. 1920×1080)
• Crop to aspect ratio: center-crops to a ratio like 4:3 without any resizing
• Cleanup and export tools: remove metadata, compress JPG, optimize PNG, create favicon bundles, create square avatars, and paste clipboard images as PNG/JPG
• Converted copies keep the original name; if it already exists, a numeric suffix is inserted before the extension (photo.jpg → photo.001.jpg, …). Size operations include the output dimensions in the name (photo.1920x1080.jpg)
• The original file is never touched
• Transparent pixels are flattened onto white when writing JPG (instead of turning black)
• Common EXIF orientations are baked in so phone photos stay upright
• Per-user settings: JPEG quality plus the resize/crop entries shown in the menu
• No admin rights required: installs and registers per user

winget install Code-iX.QConvert

Download the MSI from the latest release and run it. The MSI is self-contained; no separate .NET Desktop Runtime install is required. The Explorer context menu is off by default and can be enabled from QConvert settings.

WebP/AVIF note: opening these formats depends on Windows image codec support. WebP output and AVIF output are written through bundled SkiaSharp support.

Windows 11 note: the QConvert menu appears in the classic context menu, under Show more options (Shift+F10).

Right-click a .png, .jpg, .jpeg, or .webp file and open QConvert:

• Format conversion (Convert to JPG / Convert to PNG, depending on the file type)
• below a separator: the resize and crop entries you selected in the settings

Launch QConvert from the Start Menu (or run QConvert.exe without arguments) to:

• set the JPEG quality (1–100, default 90)
• pick the Resize to fit / Crop to size boxes (HD, Full HD, WQHD, 4K, mobile, or any custom WxH)
• pick the Crop to aspect ratio entries (4:3, 3:2, 16:9, 21:9, 1:1, 9:16, or any custom X:Y)

Press Save & update context menu — settings are stored per user in %APPDATA%\QConvert\settings.json and the context menu is rebuilt.

QConvert.Cli.exe (--to <jpg|png|ico|webp|avif> | --fit <WxH> | --cover <WxH> | --crop <X:Y> | --strip-metadata | --sepia <0-100> | --compress-jpg | --optimize-png | --favicon | --avatar <size> | --paste <jpg|png>) [--quality <1-100>] [--background <#rrggbb>] <file-or-folder> [<file-or-folder> ...]

QConvert.Cli.exe is a silent Windows executable, so Explorer context-menu actions do not flash a console window. QConvert.exe remains the graphical settings and image-editor app.

Exit codes: 0 success, 1 one or more conversions failed, 2 invalid arguments.

Requires the .NET 10 SDK.

dotnet build QConvert.slnx         # build
dotnet test QConvert.slnx          # run tests

Build the installer:

dotnet build QConvert.Installer/QConvert.Installer.wixproj -c Release -p:ProductVersion=1.0.0

• Push a tag like v1.2.3.
• The release workflow builds/tests, publishes self-contained win-x64, builds QConvert-1.2.3-x64.msi, creates a GitHub Release, and runs winget-releaser when WINGET_TOKEN is configured.
• Keep the installer UpgradeCode stable across releases.
• The winget identifier is Code-iX.QConvert; the installer is self-contained and should not declare a .NET runtime dependency.
• First winget listing still requires the package to exist in microsoft/winget-pkgs; after that, winget-releaser can submit update PRs.

MIT © Code-iX