From PNG to JPG in your browser
PNG files are everywhere: screenshots, exports from design tools, images saved from websites, photos that went through an editor. PNG is lossless, which is perfect for graphics but wasteful for photos — a single photo saved as PNG can weigh many megabytes. Converting it to JPG usually cuts the size dramatically and makes the file acceptable to any upload form.
Drop your files and the first one appears as a preview, with transparent areas shown as a checkerboard; they are filled with the background color when the JPG is saved. When you click Download, every file is converted with the same settings.
The two settings
| Setting | Range | Default | Tip |
|---|---|---|---|
| Quality | 50–100% | 92% | 85–92% for photos; 80% when you need small files for email. |
| Background for transparent areas | Any color | White | Match the page, slide or document the image will go on. |
About transparency. A PNG logo with a transparent background will get a solid background once it is a JPG — there is no way around it, because the JPG format has no alpha channel. If the logo has soft, anti-aliased edges, pick the exact color of the place it will appear so those edges blend in. If you need to keep transparency and still want a smaller file, convert with JPG to WebP instead, which also accepts PNG and keeps the alpha channel.
When to keep PNG instead
| Image | Better format |
|---|---|
| Photos, scans, illustrations with gradients | JPG |
| Screenshots with small text, UI mock-ups | PNG |
| Logos and icons on a transparent background | PNG (or ICO for favicons — see PNG to ICO) |
| Images you will edit and save again | PNG |
A quick rule: if the picture came from a camera, JPG is right. If it was drawn on a computer and has flat colors and sharp edges, PNG often stays smaller and looks better.
Why some PNG files are so heavy
PNG compresses by finding repeated patterns of pixels. Flat colors and simple shapes repeat a lot, so logos and diagrams make tiny PNG files. A photo has noise and fine texture almost everywhere, so PNG finds little to compress and the file stays close to its raw size. JPG takes a different approach: it discards detail the eye barely notices, which is why it suits photos so well. Screenshots of photos, phone screenshots and images exported from editors with “PNG” as the default are the usual suspects.
Making the JPG even smaller
If the converted file is still too heavy, lower the quality a few points and compare the size shown after saving, or use Compress Image, which can aim for a target file size in KB. To go back to a lossless copy of a JPG, use JPG to PNG — though it won’t undo JPG compression already applied.
Privacy
Everything runs locally: the browser decodes the PNG, draws it on the background color and saves the JPG. Your images are not uploaded, there are no tracking cookies, and the converted file contains no copied metadata. There is no limit set by us on the number or size of files.