PyMuPDF is a Python library used for various tasks including reducing the size of PDF files.PDF files can bloat due to factors like high image resolutions and embedded fonts.To reduce PDF size using PyMuPDF, one must install the library, import necessary modules, and compress the file.The process involves loading the original PDF, scaling the content, converting it to JPEG, and inserting it into a new compressed document.After compression, the new PDF is saved, and the original and compressed file sizes are displayed.PyMuPDF can be applied for email attachments, web performance, and storage management in various settings.Utilizing PyMuPDF with Streamlit allows for a user-friendly interface to handle file compression.Streamlit setup involves creating a page, handling files, allowing user control, and managing the processing flow.To run Streamlit locally, the GitHub repository for the project needs to be cloned, and Streamlit should be installed.By running the Streamlit file, a local URL is generated for building and running mini projects like the PDF compressor.