What to expect
How JPG to PNG works
Convert a JPG to PNG when an editor or upload form requires PNG. The image dimensions stay the same, and later PNG saves will not add another round of JPG compression.
When PNG is useful
- A design or development tool accepts PNG only
- You plan to add text or graphics and save again as PNG
- An upload form specifically asks for a PNG file
What stays the same
Width, height, and the visible JPG pixels stay the same. Existing JPG compression marks remain, but the new PNG stores those pixels without adding JPG compression.
File size and background
Photos often become larger as PNG. The background also stays as it is because JPG files do not contain transparency information.