RxnCaption helps you turn chemistry reaction diagrams into clear text. It is built for people who want to inspect or study reaction schemes on Windows without setting up a complex toolchain.
Go to the RxnCaption Releases page to download and run this file.
Look for the latest release and choose the Windows file that matches your PC.
If you see more than one file, pick the one that ends in one of these formats:
.exefor a standard Windows app.zipif the app comes as a folder.msiif the app uses a Windows installer
Use a Windows PC with:
- Windows 10 or Windows 11
- At least 8 GB of RAM
- 2 GB of free disk space
- A recent Intel or AMD processor
- A screen resolution of 1366 × 768 or higher
For best results, use a machine with a dedicated graphics card. The app can still run on many regular laptops.
- Open the RxnCaption Releases page.
- Download the Windows file from the latest release.
- If the file is in a
.ziparchive, right-click it and choose Extract All. - Open the extracted folder.
- Double-click the
.exefile or start the.msiinstaller. - If Windows asks for permission, select Yes.
- Follow the steps on screen until setup finishes.
- Start RxnCaption from the desktop, Start menu, or the folder where you extracted it.
When you open RxnCaption for the first time:
- Wait for the app to load.
- Select a reaction diagram image from your computer.
- Let the app process the image.
- Read the generated caption or text output.
- Copy the result if you want to save it in another file.
If the app asks for a model file or data folder, place it in the same folder as the program unless the release page says otherwise.
RxnCaption is designed to help with reaction diagram parsing through visual prompt guided captioning. In plain terms, it looks at a reaction image and produces text that describes what it sees.
Typical use cases:
- Reading reaction schemes from papers
- Checking diagram content
- Turning image-based chemistry notes into text
- Helping with study and review work
- Reviewing reaction diagrams in a faster way
A release may include these common files:
RxnCaption.exe- the main appmodelorweightsfolder - the trained model filesconfigfile - app settingsREADME.txt- short setup helplicensefile - usage terms
Keep all files together if the release package includes them in one folder.
- Open the app.
- Choose an image file such as
.png,.jpg, or.jpeg. - Wait while the diagram is analyzed.
- Review the caption text.
- Copy, save, or reuse the result.
For better output, use clear images with sharp text and good contrast. Cropped diagrams usually work better than full page scans.
- Use a clean image with no blur.
- Keep the whole reaction diagram in view.
- Avoid dark shadows and glare.
- Use high-resolution files when you can.
- Crop out pages, margins, and unrelated figures.
- If the image is sideways, rotate it before loading it.
RxnCaption is meant for reaction diagram images. It may work best with:
- Reaction schemes from journal papers
- Scanned lab notes
- Diagram screenshots
- Cropped chemistry figures
- Slides with reaction pathways
Try these steps:
- Make sure you downloaded the full release package.
- Keep the app files in one folder.
- Check that Windows did not block the file.
- Right-click the app and choose Run as administrator.
- Install the latest Windows updates.
- Restart your computer and try again.
- Download the release again if the file looks broken.
If you use a .zip file, extract it before running the app.
Yes. The release package is meant for Windows users.
No. You only need to download the release and open the app.
No. Use the packaged Windows release from the Releases page.
Yes, as long as the app files stay together.
If the release package includes all needed files, it can run without a browser after setup.
RxnCaption is shared under the license shown in the repository. Check the release page and repository files for the terms that apply to your download.