A small cross-platform python script to interactively crop and resize lots of images images quickly. Image editors like gimp take way too long to start, open an image, crop it, export it. A batch job/script can automate it but everything gets cropped at the same positions. This app sits in the middle, automating loading/clicking crop/save/next so your amazing human vision can be used to quickly select what needs to be cropped and not wasted on navigating clunky GUI hierarchies.

This is really a minimal GUI and preview for the following imagemagick command:

convert in.jpg -crop <region> -resize <fit> out.jpg

This script actually uses imagemagick under the hood for its fast and high quality resampling algorithms. The GUI shows a quick and low quality preview.

Select the source directory to process. By default results are written to a crops subdirectory.

• space - crop and advance to the next image
• left/right - previous/next image
• click - move the selection, or drag to box-select depending on the mode (hold shift to move the box-select)
• scroll - adjust crop size when using scroll mode (hold shift for small adjustments)

Buttons:

• Copy - copy the source image file to the output directory (no crop/resize)
• Resize - shrink the image to the smaller of the given width or height, keeping aspect ratio
• Crop - crop the image to match the region shown in the preview, also resizing if the option is selected

Download a pre-built from the releases section on github. These are self contained packages created with pyinstaller.

Alternatively, grab the source and dependencies. I hope it's simple enough that people with a little python experience can adapt it as needed.

git clone https://github.com/pknowles/cropall.git
cd cropall
python -m venv .venv

# linux
. .venv/bin/activate

# windows
. .venv/Scripts/Activate

pip install -r requirements.txt
python cropall.py

# Install ImageMagick https://docs.wand-py.org/en/latest/guide/install.html
# E.g.:

# Ubuntu
sudo apt-get install libmagickwand-dev

# Fedora
sudo dnf install ImageMagick-devel

# Windows (make sure to match python x86 or x64)
# Download dll from: https://imagemagick.org/script/download.php#windows

# Optional: create the standalone binary distribution
pyinstaller cropall.spec

Feel free to report issues and post ideas. Pull requests are most welcome, thank you! I can't promise I'll get to them immediately but I'm grateful for your time to improve the app 😊.

• @rystraum has added a number of features such as rotation and keyboard shortcuts. See #2.
• There's a great list of alternatives here: https://askubuntu.com/questions/97695/is-there-a-lightweight-tool-to-crop-images-quickly
• E.g.: https://github.com/weclaw1/inbac

The python source code here is under GPL v3.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

Pre-built binaries of ImageMagick are included with the distribution. See: https://imagemagick.org/script/license.php

The release distribution includes various scripts and binaries collected by pyinstaller. Licenses found in the venv directory are included by cropall.spec.