PNG to JPG — Convert PNG to Smaller JPEG Online
Convert PNG images to JPG and shrink file size dramatically, with a quality slider to balance size against detail. Transparent areas are flattened onto a white background.
When to use it
- Shrinking a heavy PNG photo so it emails or uploads faster.
- Meeting a JPG-only upload requirement on a form or marketplace.
- Reducing page weight by serving photos as JPG instead of PNG.
- Converting a screenshot you don't need transparency on to a smaller file.
Features
- Convert PNG to JPG
- Adjustable quality slider
- Transparency flattened to white
- Much smaller files for photos
- Download the JPG image
About PNG to JPG
PNG to JPG re-encodes a lossless PNG as a JPEG, which uses lossy compression to make photos far smaller. Because JPEG has no alpha channel, any transparent pixels in the source PNG are flattened onto a solid white background during conversion. A quality slider controls how aggressively JPEG compresses: higher keeps more detail and a larger file, lower saves more space at the cost of visible artifacts. It is the right move when a PNG photo is too heavy and you don't need transparency.
How to use this tool
- Upload a PNG image.
- Choose the output quality.
- Click Convert to JPG.
- Download the JPG file.
Examples
logo.png · transparent background · 480 KB
logo.jpg · white background · ~90 KB (quality 85)
The transparent area becomes solid white because JPG cannot store transparency.
Tips & gotchas
- Transparency is flattened to white — if you need a different backdrop, place the PNG on that color before converting, or keep PNG/WebP for transparency.
- Pick quality vs size with the slider: around 80–90 looks clean for most images, while lower settings trade visible artifacts for smaller files.
- JPG is best for photographs; for logos, screenshots, and flat-color graphics, PNG or WebP usually looks sharper at a similar size.
- Converting is one-way for quality — JPEG discards detail, so don't repeatedly round-trip an image between PNG and JPG.
Specifications
| Input | PNG (lossless, supports transparency) |
|---|---|
| Output | JPG / JPEG (lossy, no transparency) |
| Quality | Adjustable slider |
| Background | Transparent pixels filled with white |
This tool runs in your browser. Your files and text are not uploaded to our servers, and we do not store your input.
Frequently asked questions
What happens to transparent areas?+
JPG has no alpha channel, so transparent pixels are flattened onto a solid white background during conversion. If you need transparency, keep the image as PNG or WebP.
Why convert PNG to JPG?+
JPG uses lossy compression, so photos become much smaller — ideal for faster pages, email attachments, and JPG-only uploads.
How do I choose the quality setting?+
Higher quality keeps more detail and a larger file; lower quality saves space but adds artifacts. Around 80–90 is a good default that stays visually clean for most images.
Will the photo look worse than the PNG?+
At high quality the difference is hard to see, but JPEG is lossy so some detail is discarded — most noticeable in sharp edges, text, and flat color areas. For those, PNG or WebP is sharper.
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