How to Convert Images to AVIF

bash

# Convert all JPEGs in a folder to AVIF
mkdir -p ./avif-output

for f in ./images/*.jpg ./images/*.jpeg ./images/*.png ./images/*.webp; do
  [ -f "$f" ] || continue
  base=$(basename "${f%.*}")
  magick "$f" -quality 80 "./avif-output/${base}.avif"
  echo "Converted $f → ${base}.avif"
done

# Compare file sizes
du -sh ./images ./avif-output

python

from PIL import Image
import os

input_dir = "./images"
output_dir = "./avif-output"
QUALITY = 80  # 60–85 recommended for web

os.makedirs(output_dir, exist_ok=True)

for filename in os.listdir(input_dir):
    if filename.lower().endswith((".jpg", ".jpeg", ".png", ".webp")):
        img = Image.open(os.path.join(input_dir, filename))

        # AVIF supports RGB and RGBA — convert to appropriate mode
        if img.mode in ("RGBA", "LA", "P"):
            img = img.convert("RGBA")
        else:
            img = img.convert("RGB")

        out_name = os.path.splitext(filename)[0] + ".avif"
        img.save(os.path.join(output_dir, out_name), "AVIF", quality=QUALITY)
        print(f"Converted {filename} → {out_name}")

print("Done!")