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Note: this repository is provided as-is and the code is not being actively developed. If you wish to improve it, that's greatly appreciated: please make the changes and submit a pull request, I'll gladly merge it or help you out with finishing it. However, please do not expect any kind of support, including implementation of feature requests or fixes. If you're not a developer and/or willing to get your hands dirty, this tool is probably not for you.

It takes two PDF files as arguments. By default, its only output is its return code, which is 0 if there are no differences and 1 if the two PDFs differ. If given the --output-diff option, it produces a PDF file with visually highlighted differences:

This opens a window that lets you view the files' pages and zoom in on details. It is also possible to shift the two pages relatively to each other using Ctrl-arrows (Cmd-arrows on MacOS). This is useful for identifying translation-only differences.

Precompiled version of the tool for Windows is available as part of the latest release as a ZIP archive, which contains everything you need to run diff-pdf. It will work from any place you unpack it to.

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