JPG to PNG Converter

PNG is lossless, so it's useful when you need to edit an image further without compounding compression artifacts, or when you need transparency support going forward.

No — a JPEG has no transparency data to begin with, so the converted PNG will still have a solid background; converting formats can't recover information that was never there.

PNG is generally larger than JPEG for photographic images, since it doesn't use lossy compression — expect the converted file to be bigger, not smaller.

No — every step (decoding, resizing, re-encoding) happens entirely in your browser using the Canvas API. Your image is never uploaded anywhere.