About the JPG to PNG Converter
Every time a JPEG is opened, edited and saved again it goes through another round of lossy compression, and the artefacts compound. Converting to PNG freezes the picture where it is: from that point on, each save reproduces the same pixels exactly. That makes PNG the right working format for screenshots you are annotating, assets you are cropping repeatedly, or any image heading into a design tool.
What conversion cannot do is undo the damage already in the file. The blocking around high contrast edges and the faint ringing near text were baked in when the JPEG was written, and no format change removes them. What you get is a faithful copy with no further loss added.
File size moves the other way from what people expect. A photograph as PNG is often five to ten times larger than the JPEG it came from, because lossless compression cannot discard detail. Use PNG when accuracy or transparency matters, and go back to PNG to JPG when the image is destined for a page where bandwidth counts. Metadata such as camera model and GPS is not carried across, which is a quiet privacy win; check what is in the original with EXIF Viewer first.
How to use
- Drop a JPG on the pane, paste it from the clipboard, or browse for it.
- Optionally set a Max width to downscale at the same time.
- Download the PNG and carry on editing from there.
Common questions
- Does converting to PNG improve image quality?
- No. It stops further loss but cannot recover detail the JPEG encoder already threw away.
- Why is my PNG bigger than the JPG?
- PNG compresses without discarding anything, so a detailed photograph needs far more bytes than a lossy JPEG of the same picture.
- Is the EXIF data kept?
- No. The image is redrawn on a canvas, so camera details and GPS coordinates are left behind.
- Can I convert a progressive JPEG?
- Yes. Baseline and progressive JPEGs are both decoded by the browser before the PNG is written.