img2pdf is a small utility to losslessly convert raster images to PDF without unnecessarily re-encoding JPEG and JPEG2000 files.
You should use img2pdf if your priorities are (in this order):
- always lossless: the image embedded in the PDF will always have the exact same color information for every pixel as the input.
- small: if possible, the difference in filesize between the input image and the output PDF will only be the overhead of the PDF container itself
- fast: if possible, the input image is just pasted into the PDF document as-is without any CPU hungry re-encoding of the pixel data.
The software is written in the Python programming language.
Key Features
- Able to handle much larger input than other software, because the raw pixel data never has to be loaded into memory.
- For JPEG, JPEG2000, non-interlaced PNG and TIFF images with CCITT Group 4
encoded data, img2pdf directly embeds the image data into the PDF without
re-encoding it. - For all other input types, img2pdf first has to transform the pixel data to make it compatible with PDF. In most cases, the PNG Paeth filter is applied to
the pixel data. For monochrome input, CCITT Group 4 is used instead. Only for
CMYK input no filter is applied before finally applying flate compression.
Website: gitlab.mister-muffin.de/josch/img2pdf
Support:
Developer: Johannes ‘josch’ Schauer
License: GNU Lesser General Public License Version 3
img2pdf is written in Python. Learn Python with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
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