How much smaller will the JPEG be compared to the PNG?

For photographs, JPEG files are typically 60–80% smaller than equivalent PNG files. For simple graphics, the difference is smaller.

Is any quality lost in the conversion?

JPEG uses lossy compression, so some quality is lost. At 85–90% quality the difference is imperceptible for most photographic images.

What happens to PNG transparency?

Transparent areas are replaced with a white background. To use a different background colour, set it in an image editor before converting.

Best Free PNG to JPEG Converter Online

PNG files are ideal for graphics and images requiring transparency, but they are often much larger than necessary when used for photographs. Converting PNG to JPEG reduces file sizes dramatically — typically by 60–80% — making images faster to load and easier to share. devtoolkit.sh's PNG to JPEG converter handles the conversion entirely in your browser, letting you control the JPEG quality level to balance sharpness against file size. Transparent areas in the PNG are filled with a white background, since JPEG does not support transparency.

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FAQ

How much smaller will the JPEG be compared to the PNG?: For photographs, JPEG files are typically 60–80% smaller than equivalent PNG files. For simple graphics, the difference is smaller.
Is any quality lost in the conversion?: JPEG uses lossy compression, so some quality is lost. At 85–90% quality the difference is imperceptible for most photographic images.
What happens to PNG transparency?: Transparent areas are replaced with a white background. To use a different background colour, set it in an image editor before converting.