PNG and JPG are the two most common image formats on the web, but they have very different strengths. PNG is lossless and supports transparency — JPG is lossy but produces far smaller file sizes for photographs. Knowing when and how to convert PNG to JPG can save significant storage space and speed up your website or file transfers.
When to Convert PNG to JPG
Convert PNG to JPG when your image is a photograph (no transparent areas needed), when file size matters more than absolute pixel perfection, or when uploading to a platform that doesn't accept PNG files. Keep your PNG for images with transparent backgrounds — converting those to JPG will fill the transparency with white.
| Convert PNG to JPG when | Keep as PNG when |
|---|---|
| Image is a photograph | Image has transparency |
| File size needs reducing | Image has text or sharp edges |
| Platform requires JPG | Logo on coloured backgrounds |
| No transparency needed | Need lossless quality |
How to Convert PNG to JPG Online
- Open the Image Converter at imgresizr.com.
- Upload your PNG file.
- Select JPG as the output format.
- Choose a quality setting (75–85% for web use, 90%+ for print).
- Click Convert and download your JPG file.
Tips for PNG to JPG Conversion
Choose Your Quality Setting Carefully
The quality setting controls how aggressively JPG compresses the image. For photographs, 75–80% quality produces files that look identical to the original on screen, while being 5–10× smaller than the PNG. For images with text or sharp lines, use 85–90% quality to avoid compression artefacts around edges.
Check for Transparency
Before converting, make sure your PNG doesn't use transparency. If it does and you convert to JPG, all transparent areas will become solid white. If you need to place the image on a non-white background, keep the PNG or export as WebP, which supports transparency with better compression than PNG.
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