How to Convert JPG to PNG (And When You Should)

September 5, 2026 · 4 min read

JPG and PNG serve different purposes. Converting between them is simple, but knowing when to convert — and when not to — prevents unnecessary quality loss and bloated file sizes. The wrong format choice can make your images look worse and your pages load slower.

When to Convert JPG to PNG

Convert to PNG when you need transparency — a logo on a colored background, a product image for compositing, or an icon with no background. Convert when the image contains sharp text or lines that JPEG compression would blur. Convert when you need pixel-perfect reproduction for screenshots or UI elements.

When to Keep JPG

Keep JPEG for photographs and complex images. A photograph saved as PNG will be 3-10x larger with no visible quality improvement. The human eye cannot distinguish between a well-compressed JPEG and a lossless PNG for photographic content. JPEG is always the better choice for file size efficiency with photos.

Quality Loss in Conversion

Converting JPG to PNG does not restore quality lost during JPEG compression — it just stores the existing quality losslessly. A heavily compressed JPEG converted to PNG will still show JPEG artifacts. Going the other direction, converting PNG to JPG introduces lossy compression. Each round of JPEG compression degrades quality slightly.

Batch Conversion Tips

When converting multiple images, maintain consistent settings. For web use, compress the output files after conversion. For print, preserve maximum quality. Our Image Compressor handles both JPEG and PNG optimization — upload in either format and download optimized results.

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Also useful: our Image Resizer for related calculations.