Convert images to PDF with lossless JPEG compression
Convert images to PDF via direct JPEG inclusion
img2pdf$ img2pdf image.jpg -o output.pdf$ img2pdf image1.jpg image2.png image3.jpg -o combined.pdf$ img2pdf *.jpg -o all_images.pdf$ img2pdf image.jpg -o output.pdf -s A4$ img2pdf photo.jpg -o document.pdf -q 85