Image Format Converter

The three formats are not interchangeable, and picking by habit is how people end up with needlessly large files or visibly damaged ones.

PNG is lossless and keeps transparency, which makes it right for screenshots, interface assets, logos and anything with text or hard edges. Its cost is size: a photograph saved as PNG is typically several times larger than the same photograph as JPEG, with no visible benefit. Because PNG is lossless, the quality setting does not apply to it at all.

JPEG is lossy and has no transparency, but it is extremely efficient on photographs, where the detail it discards is detail the eye does not miss. It is a poor choice for text and line art, where its artefacts land exactly on the edges you care about.

WebP handles both cases and generally produces smaller files than either at comparable quality, with transparency support. It is supported across current browsers, and the reason to avoid it is compatibility with older software rather than quality.

One consequence is worth knowing before you use the result. Processing happens by drawing the image onto a canvas and encoding what was drawn, and a canvas holds pixels only. Every piece of metadata is therefore dropped: EXIF, the camera model, the timestamp, the colour profile, and any embedded GPS coordinates. That is excellent if you are stripping location data before posting a photo, and a real loss if you were relying on capture dates to keep an archive in order. Keep the original.