PNG to JPG
Shrink screenshots and PNG photos by saving them as JPG. Usually 70 to 90% smaller.
More options
Why PNG files are so big
PNG stores every pixel exactly. That is perfect for screenshots of text and simple graphics, but photos saved as PNG are huge. JPG compresses photos far more efficiently with no visible difference.
What happens to transparency
JPG has no transparency, so transparent areas are filled with a solid colour. The default is white. You can pick another colour under More options.
Questions
Are my photos uploaded anywhere?
No. The conversion runs inside your browser on your own device. Your files are never sent to a server, so it also works for private photos and documents.
Should screenshots be PNG or JPG?
Screenshots with lots of text and flat colour stay sharper as PNG. Screenshots of photos, games or video are better as JPG.