Image ConvertersLesson 224Free preview

JPG to PNG

This lesson is part of Web Developer Tools · All levels

Summary

Converting JPG to PNG converts a lossy photo to a lossless file, but does not recover lost details. PNGs are usually larger and useful if you need to edit repeatedly or add transparency. For the simple purpose of displaying photos on the web, JPG or WebP is usually more cost-effective.

Key points

PNG is lossless, but cannot repair JPEG artifacts
The resulting conversion files are generally larger than the original JPG
PNG supports alpha, so it can be used for transparent composition.
Repeat editing on PNG does not add a new generation of compression
The conversion back to JPG will apply lossy compression again

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