JPG and PNG guides
Straight answers about image formats, backed by our own tests. Every number in these guides comes from converting real files with the same code that powers our converter.
JPG vs PNG: Differences, File Size and When to Use Each
Lossy vs lossless, transparency, file size and a use-case table that tells you which format to pick for photos, logos, screenshots, web and print.
Read guide →Why Is My PNG Bigger Than the JPG? (Measured, With Fixes)
We measured how much PNG files grow after conversion, why the browser's PNG is 2–3× bigger than it needs to be, and what actually shrinks it.
Read guide →Does Converting JPG to PNG Improve Quality? A 10-Save Test
PNG can't bring back detail a JPG threw away, but it stops the damage from getting worse. We measured quality loss over ten edit-and-save cycles.
Read guide →How to Make a JPG Transparent (Remove a White Background)
Why a JPG can never have a see-through background, how alpha channels work, and three ways to get a transparent PNG from a JPG.
Read guide →How to Convert JPG to PNG on Windows, Mac, iPhone and Android
Built-in methods for Windows (Paint, Photos), Mac (Preview, Finder, sips), iPhone (Shortcuts), Android, Linux and the command line, including batch conversion.
Read guide →JPG vs JPEG: Is There Any Difference? (Plus .jfif and .jpe)
Same format, different extension. Why both names exist, what .jfif and .jpe files are, and when renaming a file is (and isn't) a real conversion.
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