Drop your JPEG file(s) here
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A JPEG to PNG conversion writes your photo out as a lossless file. From that point on nothing further is discarded, however many times you save it. That is the entire reason to do it, and it is a good reason if the image is about to be edited.
This is the misunderstanding worth clearing up first. Whatever the JPEG already threw away is gone. Compression artefacts, blocky skies, the soft halo around text, all of it is baked into the pixels and PNG copies those pixels faithfully. What you get is a lossless copy of a lossy picture, not a restored one.
Several times the size is normal, and on a large photograph it can be more than that. PNG stores every pixel exactly, and photographs are made of millions of pixels that never quite repeat, so there is very little for it to compress. This is not a fault, it is the whole point of the format.
If the image is going into an editor and will be saved repeatedly, converting first stops each save from shaving off a little more quality. If a tool you are using only accepts PNG, that settles it. And if you plan to cut a background out, you need a format with an alpha channel to put the result into, which JPEG does not have.
Nothing lost from here on
Once the file is PNG, saving it again costs no further quality.
An alpha channel to work into
PNG can hold transparency, so a cutout has somewhere to live afterwards.
Names carried over unchanged
Each PNG arrives under the filename of the JPEG it came from.
Free, including large batches
Converting a whole folder of photos costs nothing.
JPEG to JPG Converter
Give .jpeg files the shorter .jpg extension that many upload forms and older programs still require.
JPEG to JFIF Converter
Save JPEG images with the .jfif extension for systems that were written to accept only that name.
JPEG to WEBP Converter
Turn JPEG photos into smaller WebP files that every modern browser displays.
JPEG to GIF Converter
Turn JPEG photos into single frame GIF images for systems that will only take a GIF.
Usually not. PNG stores that kind of information differently and most of it is dropped, so keep the JPEG if the metadata matters.
For a print shop, a high quality JPEG at full resolution is normally fine and far easier to send. PNG matters more when the file will be edited before it is printed.
Yes, each output keeps its source name with the extension swapped, so a folder of hundreds stays matched up.
Rarely. The file will be several times heavier for no visible gain. WebP or AVIF is the sensible choice for photographs on a page.