A minimal open-source Windows utility that combines any number of images into one LLM-friendly PNG.
Download for Windows · MIT License · Report an issue
ContextStitch is useful when you want to send several screenshots or references to an AI model without attaching each image separately.
Everything runs locally. ContextStitch does not upload images or collect data.
Download the latest Windows package from GitHub Releases.
- Download
ContextStitch-Windows-x64-v1.0.0.zip. - Extract the ZIP anywhere you want to keep the app.
- Double-click
ContextStitch.exe.
ContextStitch is currently unsigned, so Windows SmartScreen may appear after downloading it. If that happens, verify that the file came from this repository, select More info, and then select Run anyway.
- Add any number of images with a multi-file picker or drag and drop.
- Open several selected images through Explorer's Open with ContextStitch command.
- Read PNG, JPEG, WebP, BMP, GIF, and TIFF files.
- Arrange images as an aspect-ratio-aware automatic grid, horizontal strip, or vertical strip.
- Minimize unused borders with justified image rows and compact default gutters.
- Export at the original size, 1080p, 1440p, 4K, or a custom resolution.
- Add an overall heading, custom captions, filename labels, and numbering.
- Save automatically to the selected folder, copy to the Windows clipboard, or do both.
- Preserve all settings locally.
- Run as a self-contained Windows x64 executable with no separate .NET installation.
By default, images are saved to %USERPROFILE%\Downloads\ContextStitch and copied to the Windows clipboard.
The per-user Explorer command Open with ContextStitch is enabled when the app starts. Select several images in Explorer, right-click one of them, and choose the command to open ContextStitch with the selection already loaded.
The integration does not require administrator access and can be disabled inside the app.
- Windows 10 or Windows 11
- 64-bit Intel or AMD processor
Install the .NET 8 SDK on Windows, clone the repository, and run:
dotnet publish -c Release -r win-x64 --self-contained trueThe published executable is created under bin\Release\net8.0-windows\win-x64\publish.
ContextStitch is available under the MIT License.