Image Converter - Transform Any Image Format Instantly

Lossy vs. Lossless: What Actually Changes

The single most important choice when converting an image is whether the target format is lossless or lossy. PNG, GIF, and SVG are lossless, meaning every pixel (or every vector path) is preserved exactly. JPG is lossy: it discards fine colour detail the eye is unlikely to notice in exchange for a much smaller file. WebP can do both, which is why it usually wins on size. Converting a JPG to PNG will not restore quality that JPG already threw away, and re-saving the same photo as JPG repeatedly compounds compression artefacts, so it is best to convert from your highest-quality source once.

Transparency is the other deciding factor. PNG and WebP support an alpha channel, so logos, icons, and cut-outs keep their see-through edges. JPG has no transparency at all: any transparent area is flattened, typically to solid white or black. If you convert a transparent PNG logo to JPG you will get a rectangular background where the transparency used to be, which is exactly why PNG remains the default for graphics with text and sharp edges.

SVG is a different animal. Rather than storing a grid of pixels, it describes shapes as mathematical paths that scale to any size without blurring. This converter traces a raster image into those paths, which works beautifully for simple, high-contrast art like logos and icons but tends to stylise or posterise photographs, since a photo's millions of subtle tones do not reduce cleanly to a handful of vector shapes.