Convert JPG to PNG offline, in bulk

Why convert JPG to PNG

An app, form or developer tool requires PNG input.
You will edit the photo repeatedly and want to freeze it as a lossless master.
You need a consistent format across a mixed folder of images.

How to convert JPG to PNG in ConvertX

1
Open Image Converter
On the Home screen tap Image Converter.
2
Select your JPG files
Tap "Select image files" and pick the JPG images (.jpg, .jpeg). On desktop you can also drag them in from Explorer or Finder.
3
Choose PNG as the target
In the output format list choose PNG.
4
Optional settings
Add a rename pattern (use {name} for the original file name), turn on "Keep photo details" if you want camera and location data copied into PNG, and pick an output folder (Android default: Pictures/ConvertX).
5
Start the batch
Tap "Convert N images". The Queue opens and processes them in order; you can stop one file or the whole batch.
6
Find the results
When the batch finishes, the summary shows the files converted and the space saved. Tap View Library to browse them, or find them in the output folder.

What to know before you convert

Converting to PNG does not improve quality: JPG artefacts are preserved exactly. It only prevents further loss.
PNG files from photos are large, often 5–10× the JPG. Use it where PNG is required, not as a default.
EXIF is stripped by default; "Keep photo details" copies it into the PNG.

JPG vs PNG: what changes

	JPG	PNG
Compression	Lossy	Lossless: always
Transparency	No	Yes
Animation	No	No
Keeps EXIF in ConvertX	Yes	Yes
ConvertX reads it	Yes	Yes
ConvertX writes it	Yes	Yes
Extensions	.jpg, .jpeg	.png

JPG: The universal photo format. Small, lossy, opens everywhere, no transparency. PNG: Lossless with transparency. Perfect for graphics, wasteful for photos.

Deciding whether to convert at all? Read PNG vs JPG: when each format is the right one.

Nothing is uploaded

ConvertX converts on the device. There is no server, no account and no file size or count limit beyond your storage. Location and camera details are removed from every output unless you turn on "Keep photo details" (PNG can carry them).

Frequently asked questions

Will JPG to PNG make my photo sharper?

No. The pixels are identical; PNG just stops any further loss.

Why is the PNG so big?

Lossless compression can't shrink photographic noise. A 3 MB JPG often becomes a 15–20 MB PNG.

Can I convert a mixed folder of JPG and PNG to PNG?

Yes. Pick everything; the app converts what needs converting.

Ready? Download ConvertX: free, with no ads, on Android and desktop.

Convert JPG to PNG, in bulk, on your device