PNG vs JPG in one paragraph
PNG is lossless and supports transparency — perfect for UI screenshots, logos, line art; terrible (huge) for photos. JPG compresses photographic images brilliantly but has no transparency — anything see-through becomes a background color (we use white). Rule of thumb: photos → JPG, graphics with sharp edges or transparency → PNG.
FAQ
Why is my PNG screenshot 8 MB?
PNG stores photographic pixels losslessly, which is enormous. Converting a photo-like screenshot to JPG at high quality usually cuts it 5-10× with no visible difference.
Will JPG → PNG improve quality?
No — it can't restore what JPG compression removed. Use it when a form demands PNG or you need to edit without further loss.