Convert JPG to PNG online
Select your photos and this JPG to PNG converter saves each one as a lossless PNG file, ready for editing, without uploading anything.
Last updated
Your files never leave your device. Everything is processed in your browser and nothing is uploaded.
How to use the JPG to PNG converter
- Press Choose images and select one or more JPG files, or drop them onto the box.
- Each photo is converted straight away, and the new PNG size is shown in the list.
- Press Download next to each PNG to save it.
- Add another batch with Convert more images, or press Clear list to start again.
How the JPG to PNG converter works
JPG images use lossy compression, so each time a JPG is edited and saved again a little more detail is lost. PNG is lossless: once your picture is a PNG, you can edit and save it as often as you like without losing anything further.
The converter decodes each JPG in your browser, draws it onto a canvas and exports a PNG. Phone photos stored sideways are turned upright, and camera metadata such as GPS location is not copied into the new file.
Formula
For each file: canvas size = image size; draw the JPG; export as a PNG. PNG has no quality setting, so every decoded pixel is kept exactly.
The PNG holds precisely the pixels of the decoded JPG. It cannot bring back detail that JPG compression has already removed.
Example
A 1.2 MB JPG photo of 3,000 by 2,000 pixels usually becomes a PNG of roughly 6 to 12 MB, because PNG stores every pixel without lossy compression.
A 50 KB JPG of a simple diagram might become a PNG of 60 to 150 KB. Any labels or arrows you add to it afterwards will stay perfectly crisp, however often you save.
Tips and common mistakes
Expect much bigger files
PNG versions of photos are often five to ten times larger. Convert only when you need lossless editing or a program insists on PNG.
Edit in PNG, share in JPG
Convert to PNG, make all your edits, and only at the end convert back to JPG or to WebP for sharing.
The background stays solid
Converting doesn't remove the background. The PNG keeps the JPG's original background colour.
Turning a PDF page into a PNG
Need a document page as an editable image? Convert the PDF to JPG first, then convert that JPG to PNG here.
Frequently asked questions
Are my photos uploaded?
No. Conversion happens in your browser and your photos never leave your device.
Does converting to PNG improve quality?
No. It keeps the quality exactly as it is now. Any blur or blocky patches in the JPG stay in the PNG.
Will the background become transparent?
No. Transparency has to be created in an image editor; conversion alone keeps the existing background.
Can I convert many JPGs at once?
Yes. Choose or drop as many files as you like and download each PNG separately.
Why is the PNG so much bigger?
JPG throws away fine detail to save space and PNG keeps every pixel, so a photo needs far more data as a PNG.