Shrink PNG files by converting to JPG
PNG is lossless, which is perfect for screenshots and logos but wasteful for photographs: a PNG photo can be several megabytes. JPEG uses lossy compression designed for photographic images and can often make the same picture five to ten times smaller with no visible difference. This PNG to JPG converter lets you control that trade-off with a quality setting and shows the resulting size immediately.
Choosing a quality setting
| Quality | Result | Use it for |
|---|---|---|
| 90–100 | Visually identical, larger files | Printing, archiving, further editing |
| 75–90 | Excellent quality, much smaller | Websites, sharing, email (90 is the default) |
| 50–75 | Small files, some softening | Thumbnails, previews |
| Below 50 | Visible blocks and color banding | Only when size matters most |
Because the preview and size comparison update immediately, the quickest approach is to lower the quality step by step and stop just before you notice a difference.
What happens to transparency
JPEG has no alpha channel, so every transparent or semi-transparent pixel must be blended with a solid color. The background option (white by default) decides which. Choose the color of the page or slide where the image will appear, and a logo with soft, anti-aliased edges will blend in seamlessly. If you need to keep the transparency, PNG or WebP is the right format; the PNG to WebP converter keeps the alpha channel and still produces small files.
When PNG to JPG is a good idea, and when it is not
- Good: photos saved as PNG by a phone, a screenshot tool or a design app; images for email attachments or forms with size limits; slide decks that became huge.
- Not ideal: screenshots of text, diagrams, logos and pixel art. JPEG adds fuzzy "ringing" around sharp edges. Keep those as PNG, or try WebP.
Example
A 1920 × 1080 photo saved as PNG might be around 3 MB. Converted at quality 85, a JPG of a few hundred kilobytes is typical, a reduction of roughly 85–90%. The exact numbers depend on the image content: detailed, noisy photos compress less than smooth skies.
Faster pages and smaller uploads
Images are usually the heaviest part of a web page. Serving a photo as a JPEG instead of a PNG can cut its download size by most of the original, which improves loading time and Core Web Vitals such as Largest Contentful Paint, especially on mobile connections. Many upload forms, from job applications to online marketplaces, also cap file sizes at a few megabytes; converting to JPG is often the quickest way to get under the limit.
Good to know
Metadata stored in the PNG, such as text chunks or color profiles, is not carried over. Very large images (above about 120 megapixels) are rejected to avoid running out of memory. To change the pixel dimensions at the same time, use the image resizer and select JPG as the output format. For the reverse direction, see JPG to PNG.
The image is decoded and re-encoded by your own browser using the canvas API. It is never uploaded, so private photos and screenshots stay on your device.