The Complete Guide to File Compression: PDF, Image, Video & Document Compression Explained
File compression is one of the most common needs in everyday work. An email attachment exceeding 25MB won't send, a PDF is too large to upload to a system, a folder of high-res photos is eating up your disk space — these scenarios all point to the same problem: the file needs to be smaller.
But "compression" means very different things in different contexts. Zipping files with 7-Zip is compression. Shrinking a 5MB photo to 500KB is also compression. Converting a 4K video to 720p? That's compression too. The technical principles behind each are fundamentally different, and so are their use cases.
This guide covers the core principles of file compression and walks through PDF compression, image compression, video compression, OFD compression, and enterprise data compliance — helping you understand the logic behind each file type and choose the right approach.
1. Fundamentals of File Compression
