Choosing the wrong format makes files unnecessarily large or destroys quality. The three formats you will use most often online are JPG (photos), PNG (graphics with transparency) and WebP (modern all-rounder).
There is no single winner — pick based on content type, transparency needs and where the image will be displayed.
Format cheat sheet
JPG — best for photographs, slides and product photos without transparency. Smaller files, lossy compression.
PNG — best for logos, screenshots, UI and any image that needs a transparent background. Larger files, lossless.
WebP — excellent for modern websites: smaller than JPG/PNG at similar quality. Supported by all current browsers.
Practical workflow
Start from your source format, convert once to the output you need, then compress. Avoid repeated JPG→PNG→JPG cycles — each lossy step reduces quality.
Use our free converters for PNG↔JPG, PNG→WebP and WEBP→PNG, then compress before uploading to your site or shop.