This free PNG to JPG converter shrinks heavy PNG files into lighter JPGs in your browser. You control the quality, decide how transparent areas are filled, and convert many images in one go.
- How to use the PNG to JPG converter
- Why convert PNG to JPG?
- Choosing the quality setting
- What happens to transparent areas
- PNG or JPG: which to keep
- A quick batch workflow
- Troubleshooting
- FAQ
- Related tools
How to use the PNG to JPG converter
- Drag your PNG files onto the drop area, or click to choose them. Add as many as you want.
- The output starts on JPG. Move the quality slider to choose how much detail to keep.
- Pick a background colour. JPG cannot be transparent, so any see-through areas are filled with this colour.
- Check the size before and after for each file.
- Download each file, or download all of them together.
The conversion is done in your browser, so your images are not uploaded. The converter can also turn images into PNG or WEBP, and it reads any image format your browser can open.
Why convert PNG to JPG?
PNG is perfect for sharp graphics, but a photo saved as PNG can be huge. A JPG of the same photo is often many times smaller, with a loss in quality that most people cannot see at sensible settings. Smaller files upload faster, email more easily, fit into form limits and load faster on a web page.
Camera pictures and photographic images compress very well as JPG, so the saving is largest here.
Many sites cap file size. Reducing a screenshot or scan from PNG to JPG often gets it under the limit.
Smaller attachments send quickly and do not clog mailboxes.
Lighter images help pages load faster, which people notice, especially on mobile data.
Choosing the quality setting
JPG is lossy. It throws away detail your eye is unlikely to miss, and the quality slider controls how much. A high setting keeps more detail and makes a bigger file. A low setting makes a small file with visible blocks and smudges, especially around text and sharp edges.
A setting in the range of about 80 to 90 is a common starting point for photos. Try it, look at the result at full size and check the size shown beside the file. If it still looks clean, go a little lower. If you see blur or blotches, go higher. The before and after sizes make it easy to find the point where extra quality stops being worth the bytes.
What happens to transparent areas
PNG can have transparent pixels, but JPG cannot. When you convert, the transparent parts must become a solid colour. The background colour option controls this. White suits most logos and web graphics. Choose a different colour if the image will sit on a coloured page or slide, so the edges blend in.
If you need to keep transparency, do not convert to JPG. Stay with PNG, or switch the output to WEBP, which can hold transparency in a smaller file than PNG for many images.
PNG or JPG: which should you keep?
| Format | Compression | Transparency |
|---|---|---|
| PNG | Lossless, exact pixels kept | Yes |
| JPG | Lossy, smaller files | No |
| WEBP | Lossy or lossless | Yes |
Use PNG for logos, icons, line art, screenshots with text and anything with transparent areas. Use JPG for photographs and complex images with lots of colour, where the size saving matters more than perfect pixels.
A useful rule: keep your original PNG as the master, and make JPG copies for sharing. Every time you re-save a JPG you lose a little more detail, so avoid editing a JPG over and over. Start each export from the original.
A quick batch workflow
Drop in the whole folder of PNG files at once. Set one quality value and one background colour, and every file is converted with the same settings. Scan the list of before and after sizes for any file that did not shrink. Screenshots with flat colour sometimes stay about the same, and in that case the PNG may be just as good.
Screenshots deserve a special mention. A screenshot of a web page or app is mostly flat colour and sharp text, which PNG handles very well, and JPG can leave faint fuzz around letters. If you must use JPG for a screenshot, set the quality higher than you would for a photo and check that small text is still crisp. Scans of paper documents are similar, so look at a sample before converting the lot.
Once you are happy, download them all. Rename the files with clear, descriptive names before you publish them on a website, and write alt text for each image.
Troubleshooting
If a picture looks darker or duller after conversion, check the colour profile of the original, since browser conversions can drop it. If a PNG with a transparent logo looks wrong with a black box, set the background colour to white or to the colour of the page it will sit on. For very big files, convert a few at a time so the tab does not run short of memory.
Banding in smooth gradients, such as a sky or a soft shadow, is another sign that the quality is set too low. Raise the slider a few steps and convert again. It is quick to try several settings on one file before you commit to the whole batch.
Frequently asked questions
How do I convert PNG to JPG?
Drag your PNG files onto the converter or click to choose them. JPG is the default output, so just set the quality and a background colour for transparent areas, check the sizes, and download. You can save each file or all of them together.
What quality should I choose?
A setting of about 80 to 90 is a sensible starting point for photos. Compare the result with the original at full size and check the file size next to it. Lower the quality until you notice flaws, then step back up a little.
What happens to the transparent parts of my PNG?
JPG cannot be transparent, so those areas are filled with the background colour you choose. White works for most uses. Pick a colour that matches the page or slide where the image will sit, or keep the PNG if transparency matters.
Will converting lose quality?
Yes, a little. JPG is lossy, so some detail is discarded, though at a good quality setting the change is hard to see. Keep your original PNG as the master and create JPG copies from it rather than editing a JPG repeatedly.
Can I convert many files at once?
Yes. Add as many images as you like, set one quality and background colour, and each file converts with the same settings. You see the size before and after for each, and you can download them one at a time or all at once.
Do my images get uploaded?
No. The work is done by your browser, so the files stay on your device and are never sent to a server. That is useful for private pictures, client images and unpublished designs. Close the tab and nothing is left behind.
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