Why PNG photos are so heavy
PNG stores every pixel without loss. That is ideal for logos and screenshots, but when a photo is saved as PNG, the file can be many times larger than it needs to be. Screenshot tools, some phones and many editing apps save PNG by default, so it is common to end up with a photo of several megabytes that would be a fraction of that size as a JPG. Converting makes it easier to email, upload or store.
How to use it
- Drop your PNG files on the page or click to select them. Any other image your browser can read works too.
- JPG is the default output. WebP is also available if the image is going on a website.
- Pick a background color for transparent areas. White is the default; click the color swatch to choose another.
- Set the quality slider. The default of 85 suits most photos.
- Optionally limit the maximum width.
- Download files one by one or as a single ZIP. The tool shows how much space each conversion saved.
The images are processed by your browser on your own device and are never uploaded.
Transparent areas and the background color
JPG cannot store transparency. Every pixel needs a solid color, so the tool fills transparent and semi-transparent areas with the background color you pick. For a logo that will sit on a white web page or document, white is right. If the image will appear on a dark background, choose that color instead; otherwise you get a white box around the logo.
Soft edges matter too. Smoothed edges and drop shadows are partly transparent, so they are blended with the background color. If you later place the JPG on a different color, a faint halo may show. When an image needs to work on any background, keep it as PNG or convert it to WebP, which keeps transparency.
Choosing a quality setting
JPG quality is a trade-off between file size and fine detail:
| Quality | Typical use |
|---|---|
| 90–95 | Photos you may print or edit again |
| 80–85 | General sharing, email, most websites |
| 65–75 | Thumbnails, previews, tight upload limits |
These are starting points, not rules. Check the result at full size: if you see blocky patches in smooth skies or smudges around text, raise the quality.
When to keep PNG
JPG is made for photos. Screenshots with small text, diagrams, charts and flat logos tend to get visible fuzz around sharp edges when saved as JPG, and sometimes the JPG is not even smaller. For those images, the PNG compressor usually gives a better result: it shrinks the PNG by reducing the number of colors while keeping edges crisp. Our PNG vs JPG guide explains the difference in more detail, and the JPG format page covers what JPG does well.
Frequently asked questions
Why did my transparent logo get a white background?
JPG has no transparency, so transparent pixels are filled with the background color, which is white by default. Choose another color before converting, or keep the logo as PNG or convert it with Convert to WebP.
Will I lose quality?
JPG is lossy, so some fine detail is discarded. At quality 80–90 the difference is usually invisible in photos at normal viewing size. Graphics with text show it sooner.
Can I convert several PNG files at once?
Yes. Add them together and use the ZIP download to get them all in one file.
Is the JPG always smaller?
For photos, almost always. For simple graphics with few colors, the PNG may already be small, and the JPG may save little or nothing.