Topic
The format everything opens. When to convert to it, what you lose when you do, and how to keep that loss small.
JPGWebP
The JPG quality number is not a percentage. What it controls inside the encoder, what each step costs in file size on a measured photo, why 100 is not lossless, and whether re-saving does damage.
JPGPNG
You converted an image and the file got two, five or thirteen times larger. Four reasons that happens, measured on one photograph, and which setting brings the size back down.
AVIFJPG
Your browser displays the AVIF perfectly and nothing else on your computer will open it. Three routes from AVIF to JPG, which one keeps the image on your device, and why the JPG comes out several times larger.
JPGConverting
Right-click, Save image as, and the file lands as photo.jfif. Why Chrome and Edge do this on Windows, why renaming it is safe, and the one-click way to get a real .jpg every time.
WebPJPG
WebP is the one image format Windows does not decode on its own. One free Microsoft package fixes Photos, File Explorer and Paint - plus the half it misses.
WebPJPG
Your browser saved a WebP and now nothing on your desktop opens it. Why renaming does not help, and five routes to a real JPG or PNG.
WebPJPG
The site gave you a .webp file and the app you need it in will not open it. Three ways to get a real JPG, and what each one costs you.
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