A simple web application for losslessly cropping JPEG images using jpegtran.
It also uses rdjpgcom for getting the image dimensions.
Both programs are included in libjpeg.
On ubuntu you can install the package libjpeg-turbo-progs.
- Install frontend requirements with
npm install. - Install backend requirements with
poetry install. - Build frontend with
npm run build(will build intodistwhich is linked frombackend/static). - Alternatively you can also start the development server with
npm run dev. - Run server with
poetry run python -m flask --app backend.app run. - Navigate with your browser to
http://localhost:5000(in case of running the vite development server: the URL printed in the shell). - It will create the folder
~/.jpegtranweb/collection. Put your images in there. They will be overwritten when you crop.
- Draggable crop box to interactively select the area you want to crop.
- Optimized for finding the maximum cropping area for the given aspect ratio.
- Select from common aspect ratios: 4:3, 16:9, 1:1 (portrait and landscape).
- Keyboard shortcuts for completely mouseless operation (as an alternative).
- Preserve timestamps and EXIF data.
Example image of Ukrainian flags beside Rotes Rathaus in Berlin from Pexels