Guide
Private PNG to JPG Converter
Convert a PNG into a broadly compatible JPG locally, with adjustable quality and an explicit background for transparent pixels.
What happens to transparent pixels?
They are replaced with the background color you select before conversion.
Opens the free tool. Your selected files stay in this browser.
Clear answers
Flatten a PNG into a verified JPG without sending the image to a conversion server.
Convert a PNG into a broadly compatible JPG locally, with adjustable quality and an explicit background for transparent pixels.
-
01
What happens to transparent pixels?
They are replaced with the background color you select before conversion.
Adjustable JPG quality
-
02
Is JPG always smaller than PNG?
Often for photographs, but not always for small graphics. NullKit shows the exact output size.
Explicit transparency background
-
03
Does conversion upload the PNG?
No. The browser performs the complete conversion locally.
Decoded output verification
A local check
Flatten a PNG into a verified JPG without sending the image to a conversion server.
Convert a PNG into a broadly compatible JPG locally, with adjustable quality and an explicit background for transparent pixels.
- 01
Selected file
Choose one PNG image.
Choose one PNG image.
- 02
Review before sharing
Explicit transparency background
Select JPG quality and the transparency background.
- 03
Local verification
Convert locally and inspect the verified preview.
Convert locally and inspect the verified preview.
Download the JPG copy.
Four local steps
Is JPG always smaller than PNG?
- 01
Adjustable JPG quality
Choose one PNG image.
- 02
Explicit transparency background
Select JPG quality and the transparency background.
- 03
Decoded output verification
Convert locally and inspect the verified preview.
- 04
Adjustable JPG quality
Download the JPG copy.
Clear answers
Does conversion upload the PNG?
No. The browser performs the complete conversion locally.
- JPG does not support transparency, so transparent pixels are replaced with the selected background.
- JPEG compression can change fine detail and color.
- Browser re-encoding removes source metadata.