Convert PNG to JPEG
Free online converter for PNG files. Universally supported lossy photo format. Nothing to install, no watermark, and every file is deleted automatically.
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Upload a PNG file to convert it to JPEG. Up to 3 files at once, 100 MB each.
Free · up to 3 files · 100 MB each · files deleted automatically after 1 hour.
About PNG and JPG
PNG .png
A lossless image format built for graphics rather than photographs. Every pixel it stores comes back exactly as it went in, and it carries a full alpha channel for transparency.
Good for
- Lossless — no generation loss no matter how often you re-save
- Full 8-bit alpha, so edges blend cleanly over any background
- Sharp on text, screenshots, logos and line art
Trade-offs
- Much larger than JPEG for photographs
- No animation in the baseline format
- Large photographic PNGs are slow to transfer
image/png
JPEG .jpg
The photographic standard since 1992. JPEG throws away detail your eye is least likely to miss, which is why a photograph saved as JPEG is a fraction of the size of the same image saved losslessly.
Good for
- Opens everywhere — no format is more widely supported
- Very small files for photographs and other continuous-tone images
- A quality dial, so you choose the trade against file size
Trade-offs
- Lossy: detail is discarded permanently, and re-saving repeatedly compounds it
- No transparency at all
- Sharp edges, flat colour and text pick up visible halos
image/jpeg
PNG and JPG side by side
| PNG | JPG | |
|---|---|---|
| Compression | Lossless | Lossy |
| Transparency | Yes — 8-bit alpha | No |
| Animation | No | No |
| Typically used for | Screenshots, logos, UI assets, anything with transparency | Photographs, camera output, web images |
What changes when you convert PNG to JPG
Transparency is flattened
PNG carries an alpha channel and JPG has none, so anything transparent has to become a solid colour. We composite onto white. If the image was designed to sit over a coloured background, convert to a format that keeps alpha instead — or expect a white box around it.
Camera data is removed by default
A PNG straight from a phone or camera carries EXIF metadata — model, settings, timestamp and, quite often, the GPS coordinates of where the photo was taken. The converted JPG is written without it, so a file you are about to share does not quietly carry your location. The orientation flag is read and applied to the pixels first, so the image will not come out sideways once the tag holding it is gone. If you need the metadata kept, there is a setting for it.
How the JPG is written
Our default is quality 82 through mozjpeg, written progressively so it renders in passes over a slow connection. The quality control on the converter moves this if you need to — the default aims to be indistinguishable from the source at a sensible file size, rather than to win a compression benchmark.
Colour detail is stored at half resolution
JPG keeps full brightness detail but records colour at half resolution in each direction, because the eye is far more sensitive to the first than the second. On photographs it is invisible. On saturated edges it is not: red text on white, thin coloured lines and flat graphic shapes can pick up fringing. If the PNG is a screenshot, a logo or anything with text in it, a lossless format will treat it far better.
This step is irreversible
PNG holds every sample; JPG keeps a close approximation. The file gets dramatically smaller, and converting back later will not undo it. Keep the PNG original if it is a master you will work from again.
Other PNG conversions
Other ways to get JPEG
Worth reading next
Why your PNG is so much bigger than your JPEG
The same photograph can be 300 KB as a JPEG and 4 MB as a PNG. Here is what each format is actually doing, and how to tell which one your file wants to be.
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Where your transparent background went
Transparency is the property most often lost silently in a conversion — the file looks perfect until it lands on a coloured background and grows a white rectangle.
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