Convert JPG to PNG Without Adding Compression Loss
The JPEG is decoded and written out as a lossless PNG, so no new artifacts appear and the image stops degrading with each save. The PNG is fully opaque: transparency is something you add afterward in an editor, not something this conversion can invent.
Download Started!
How would you rate your experience with MiConvert?
Why convert JPG to PNG
JPG stores photos as frequency coefficients and throws away detail to stay small, and it has no alpha channel at all. Every time a JPG is opened, edited and saved again, another round of that loss is baked in, which is why text, logos and flat-color graphics in a JPG pick up visible fringing after a few generations. PNG compresses losslessly and supports an alpha channel, so it is the format people switch to before they start editing, and the format many icon builders, favicon generators, sprite tools and design systems demand as input.
On MiConvert the JPEG is decoded on our servers with libvips through sharp and written as PNG at compression level 6. The pixel data comes straight from that decode, so the PNG is a frame-accurate copy of what the JPEG contains and nothing new is lost. Baseline and progressive JPEGs are both read, .jpeg and .jfif are treated as the same format, a CMYK JPEG is converted to sRGB on the way through, and EXIF orientation is applied so a phone photo comes out upright instead of sideways. If someone handed you a JPEG XL file saved with a .jpg name, we detect that from the content and decode it properly rather than failing.
Two caveats are worth knowing. The PNG is written without EXIF and without an embedded ICC profile, so camera model, capture date, GPS coordinates and any attached profile do not travel into the output. And because PNG keeps every pixel, including JPEG's compression noise, the file usually ends up several times larger than the original photo.
This pair is mostly used by people preparing an image for work rather than for viewing: cutting out a background in an editor, feeding an asset into a tool that rejects JPG, or freezing a file at its current state so repeated saves stop eating into it.
How to convert JPG to PNG
- Make sure you are uploading the image itself. Copying from a Mac can leave files starting with ._ that only hold metadata; those are rejected with a message about resource forks, and the fix is to pick the real photo.
- Drop your JPG, JPEG or JFIF files onto the page. Guests and free accounts send up to 10 per batch at 50 MB each, or 100 MB each once signed in; Plus and Pro raise that to 25 and 50 files and 200 MB and 1 GB.
- Start the conversion. At the file sizes we typically see on this pair, results are ready within a few seconds of the upload finishing.
- Download the PNGs. The links work for about 4 hours.
- If you need a transparent background, open the PNG in an image editor and erase or mask the background there. The PNG format gives you somewhere to store that transparency; the conversion itself cannot create it.
What you get
- A lossless PNG that matches the decoded JPEG pixel for pixel, with no second round of compression
- EXIF orientation applied, so portrait phone photos are written upright
- CMYK JPEGs converted to sRGB instead of coming out with inverted-looking colors
- Content sniffing that catches misnamed files, including a JPEG XL saved as .jpg and macOS resource-fork stubs
- No EXIF or GPS data written into the PNG output
- Batches of 10 files for guests and free accounts, 25 on Plus, 50 on Pro
Video Tutorial
Watch this step-by-step tutorial to learn how to convert JPG files to PNG format online for free using MiConvert.com. No software installation required.
JPG to PNG questions
Can you convert a JPG to a PNG with a transparent background?
Not here. A JPG has no transparency data to carry over, so the PNG we produce is fully opaque. Converting gives you a format that can hold an alpha channel; the actual cut-out has to be done in an editor such as Photoshop, Affinity Photo, GIMP or Paint.NET, or with a dedicated background remover, after the conversion.
Does converting restore quality the JPG already lost?
No. PNG preserves what the JPEG contains going forward and adds no new loss, but the detail discarded when the JPEG was first compressed is unrecoverable. If an original camera file or RAW exists, converting that instead gives a better result.
Why is the PNG so much larger than the JPG?
PNG encodes every pixel without discarding anything, and it faithfully stores the fine compression noise of the JPEG as well, which compresses poorly. Photos commonly grow three to five times; flat graphics and screenshots grow much less.
I got a message about a macOS resource fork. What does that mean?
The file you picked begins with ._ and is a metadata stub macOS creates when copying to other filesystems, not an image. Open the folder on the Mac itself and upload the real .jpg file, which sits next to it under the same name.
The conversion failed with a message about the file being corrupt or unsupported. What now?
That happens when the JPEG is truncated or otherwise unreadable, usually after an interrupted download or a damaged card. Try opening it in an image viewer and re-saving it, or download the original again, then convert the re-saved copy.
Is the camera metadata and GPS location kept in the PNG?
No. The PNG is written without EXIF and without an ICC profile, so capture date, camera model and GPS coordinates are not present in the file you download. If you need that information preserved, keep a copy of the original JPG.
Can I convert many photos at once?
Up to 10 files per batch without an account, 25 on Plus and 50 on Pro. Each result is downloaded separately; there is no ZIP of a whole batch. There is also an hourly cap of 10 conversion jobs per IP for guests and free accounts.
What happens to my images on your servers?
Processing is server-side, not in your browser. The uploaded JPG is deleted the moment the job ends, and the PNG is available through a random download link for about 4 hours before it is deleted automatically. File names, sizes and conversion outcomes appear in our logs, and signed-in accounts keep a history row.