Image format converter
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Convert PNG to JPG or JPG to PNG in your browser. Pick the target, set JPEG quality and download — no upload, no server.
same pixels, different wrapper, no server involved.
work surface
Math, not advice — results are indicative.Read the disclaimer.
most-used utilities
A logo for a photo slot
Convert the transparent PNG to JPEG and choose a background that matches the page.
A screenshot for editing
Convert the JPEG to PNG before annotating it, so each save stays lossless.
A smaller photo
Convert the PNG photo to JPEG at around 85% quality and compare the file size.
pro tips
Use PNG for logos and screenshots, JPEG for photos. The format matters more than the quality slider.
When converting PNG to JPEG, set the background to the color of the page where the image will appear.
Converting JPEG to PNG does not restore detail that JPEG already discarded; it only stops further loss.
what it does
This converter turns a PNG into a JPEG or a JPEG into a PNG, locally. The source format is detected from the file; you choose the target and, for JPEG, the quality.
PNG is the right wrapper for screenshots, logos and anything with transparency. JPEG is the right wrapper for photographs, where a little loss is invisible and the smaller file matters. Converting between them is mostly about choosing which of those two trade-offs you want.
A transparent PNG converted to JPEG needs a background, because JPEG has no alpha channel. The default is white; pick another color if the image will sit on a dark page. Going the other way, JPEG to PNG, adds no transparency but gives you a lossless file that can be edited without another generation loss.
Choose a file, select the target, adjust the JPEG quality if relevant, and download. The preview and the size comparison update as you change the settings.
quick answers
Does converting PNG to JPG lose quality?
Yes, JPEG is lossy. The quality slider controls how much detail is discarded; 85–90% is a good balance for most images.
What happens to transparency?
JPEG has no alpha channel, so transparent areas are filled with the selected background color. PNG output keeps transparency.
Is the file uploaded?
No. The conversion uses a canvas in your browser, and the file is never sent anywhere.