Converting Files Without Losing Quality
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Lossy vs lossless: the most important distinction
“Why does my file look worse after converting?” is the universal frustration. The good news: most quality loss is preventable once you understand which conversion steps are lossy and which aren’t. This guide is the practical breakdown — what each conversion type does to your file, when quality loss is inevitable, and how to minimize it.
Preserving image quality during conversion
Every conversion is one of two types:
Keeping metadata across conversions
The trap: many lossy conversions LOOK lossless at default settings. Converting a PNG to JPG at 100% quality still throws away color information you can’t see — but a third converter that re-saves the same JPG will compound the loss. Quality degrades incrementally with each save.
Does compression affect format conversion?
The hierarchy of image format quality:
Does converting files multiple times damage quality?
The conversion rules:
Preserving structure: tables, lists, hierarchy
Three different things people mean by “compression”: