Turn JPG into PNG in Your Browser — Lossless

When to convert JPG to PNG

JPG relies on lossy DCT compression that discards image data every time it's saved, so converting JPG to PNG can't recover detail JPEG already threw away — you get a lossless copy of whatever quality the JPG currently holds, with no further generational loss from that point forward. PNG's DEFLATE compression preserves every remaining pixel exactly, so cropping, retouching, or re-exporting never introduces the fresh compression artifacts repeated JPG saves would add. PNG also carries a full 8-bit alpha channel the JPG never had. Since JPG stores no transparency data, the converted PNG starts fully opaque, but you can then mask or erase areas in an image editor and get clean, banding-free edges — something JPG's blocky compression struggles with around text, logos, and hard-edged graphics. Expect the file to grow, often 2-5x larger than the source, because PNG keeps color data JPEG would have thrown away. Every modern browser, editor, and print workflow reads PNG natively, so compatibility is never a concern. Skip this conversion if your goal is a smaller file for email or the web — PNG works against you there. Use it when you need a stable, lossless base for further edits or transparency work.

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