PNG to JPG Converter
Turn a PNG into a smaller JPG for sharing and email — choose the background colour for any transparent areas. Free, private, in your browser.
Why convert PNG to JPG?
A JPG is much smaller than a PNG for photos, which makes it ideal for email, uploads and messaging. JPG has no transparency, so any see-through areas are filled with a background colour you pick. Lumisphere converts in your browser — drop a PNG, set the quality and fill colour, and download a JPG. No upload, no sign-up, no watermark.
- 1Add. Drop, paste or browse for an image (or several).
- 2Choose. Pick PNG, JPG, WebP or AVIF — tune quality for the lossy ones.
- 3Download. Save the converted file, or the whole batch.
Other conversions: Image Converter · PNG to WebP · SVG to PNG — the same private, in-browser converter. Need transparency instead? Try the background remover (no upload).
Good to know
How do I convert a PNG to JPG?
Drop your PNG in, choose JPG, pick a background colour for any transparent areas, and download a smaller file that’s easy to share.
What happens to a transparent background?
JPG can’t store transparency, so transparent areas are filled with the background colour you choose (white by default). Pick any colour before downloading.
Will the JPG be smaller?
For photographs, much smaller. Use the Quality slider to balance file size against sharpness — lower quality means a smaller file.
Will I lose quality?
JPG is lossy, so there’s some compression. At high quality the difference is hard to see; for logos and sharp text PNG or WebP keep edges crisper.
Is it free and private?
Yes — no sign-up, no watermark, no limit, and the PNG is converted on your device and never uploaded.
Transparency gets flattened — choose the colour behind it
JPG has no alpha channel, so any see-through pixels in your PNG have to land on something. The converter flattens them onto a background colour you pick — white by default, but match it to wherever the image will sit so the edges don’t jar. For a photographic PNG with no transparency this is invisible; the real prize is size, because a heavy lossless PNG photo often drops to a fraction of its weight once it’s a JPG, which is what makes it so much easier to email or upload.
The lossy trade-off, and when to keep the PNG
JPG compression is lossy, so it discards subtle detail to shrink the file — fine for photographs, where the eye forgives it, less so for crisp graphics. Push the quality too low and you’ll see blocky halos around hard edges. That’s the tell for when not to convert: logos, line art, sharp UI screenshots and anything with fine text stay cleaner as PNG or WebP, both of which keep edges crisp and can hold transparency that JPG simply can’t.