Recommended image sizes online are
convert images from .heic to .jpg extension
for file in *.heic; do sips -s format jpeg "$file" - out "${file%.HEIC}.jpg"; done
Change image size with python image processing library, PIL/Pillow
pip3 --version
pip3 install Pillow
python3 // start a python shell
from PIL import Image // verify Pillow installation
create a python script
import os
from PIL import Image
# Define the folder containing the images
folder_path = 'path/to/your/folder' # Change this to your folder path
# Define new width (height will be adjusted to maintain aspect ratio)
new_width = 2000
# Loop through all files in the directory
for filename in os.listdir(folder_path):
if filename.endswith(('.jpg', '.jpeg', '.png')): # Add more extensions if needed
file_path = os.path.join(folder_path, filename)
# Open the image file
with Image.open(file_path) as img:
# Calculate the new height to maintain aspect ratio
new_height = int((new_width / img.width) * img.height)
img = img.resize((new_width, new_height))
# Save the resized image (you can overwrite or save with a new name)
img.save(os.path.join(folder_path, f'resized_{filename}'))
print("Resizing complete!")
run the python script
$python3 filename.py
convert images from .jpg to .webp extension
.webp
and .avif
image files are generally preferred over .jpeg
and .png
files because they offer high quality while being compressed, making them lighter and optimizing speed. By installing cwebp
on our local machine, we can easily create .webp
files.
$brew install webp
/*** get to your directory ***/
$cd path/to/your/folder
/*** run this bash command, in this folder, all files with .jpg create .webp files ***/
$for file in *.jpg; do cwebp "$file" -o "${file%.jpg}.webp"; done