Image Format Converter

Choosing the right raster format

PNG, JPEG, and WebP each suit different content. PNG is lossless and supports transparency, which makes it right for logos, icons, and screenshots with sharp edges. JPEG is lossy and has no transparency but compresses photographs small. WebP is the newer all-rounder: it does both lossy and lossless, supports an alpha channel, and usually beats both older formats on size.

Transparency is the deciding factor

If an image has transparent areas and you convert it to JPEG, those areas fill with a solid color, usually black or white, because JPEG has no alpha channel. That is the most common conversion surprise. WebP keeps alpha, so a transparent PNG converts to WebP without losing its cutout.

Example

Logo with transparency:
  PNG  -> 48 KB, crisp edges, alpha intact
  WebP -> 22 KB, alpha intact
  JPEG -> 31 KB, BUT transparent areas turn solid

For that logo, WebP is the clear pick: smaller than PNG and it keeps the transparency JPEG would destroy.

Pitfalls

Converting JPEG to PNG does not restore quality; it just wraps the already-lossy pixels in a larger lossless container. Going from a lossy format to another lossy format stacks artifacts, so convert from the highest-quality source you have. After converting, you can further shrink dimensions with the image resizer, or encode the result for inline use with image to Base64.

FAQ

Is WebP safe to use everywhere? All current browsers support it. If you must support very old clients, keep a JPEG or PNG fallback via the <picture> element.

What about AVIF? AVIF often compresses even smaller than WebP but encodes slower and has slightly narrower support; it is worth it for large hero images.

Why did my photo get bigger as PNG? PNG stores photographic detail poorly. Keep photos in JPEG or WebP.