PNG vs JPG: File Size, Compatibility and When to Convert PNG to JPG
Learn why PNG files are often large, when a PNG to JPG conversion saves space, and what happens to transparency.
Why Are PNG Files So Large?
PNG stores every pixel without loss. For graphics with flat colors, that stays small. For photographs and screenshots with gradients, a PNG can be several times larger than a JPG of the same image.
PNG vs JPG: File Size and Compatibility
| Feature | PNG | JPG |
|---|---|---|
| Typical photo file size | Large | Small |
| Upload and email limits | Easier to exceed | Easier to fit |
| Web page load | Slower for photos | Faster for photos |
| Transparency | Yes | No, flattened to a solid color |
| Support | All modern software | Universal, including older systems |
When to Convert PNG to JPG
- A form, marketplace or email service rejects your file for being too large.
- A photo on a web page is slowing it down.
- You are sharing many photos and want to save storage.
- The destination only accepts JPG.
When to Keep the PNG
Keep PNG for logos, icons, text-heavy screenshots and anything that needs a transparent background. JPG can blur thin lines and text, and it cannot store transparency.
What Happens to Transparency
JPG has no transparent pixels, so transparent areas are filled with a solid color, usually white, when you convert. Check the result if the image will sit on a coloured background.
How to Convert PNG to JPG
Open the PNG to JPG converter, add your image, convert it and download the JPG. Files are processed in your browser. If you need quality and transparency rather than size, read JPG vs PNG. To shrink the file further, try Compress Image.
Effect on Page Speed and Email Limits
Large PNG photos make web pages slower to load and can push an attachment over an email or upload limit. Converting photographic PNG files to JPG is a common way to bring the size down. Check the exact limit of the service you are using.
Compatibility
Both formats open in every modern browser and image viewer. JPG is accepted almost everywhere, including older systems and forms that only allow JPG, which is a frequent reason to convert.
Frequently Asked Questions
Will converting PNG to JPG reduce quality?
Slightly, because JPG is lossy. At a high quality setting the difference is usually hard to see in photos.
How much smaller will the JPG be?
It depends on the image. Photos often shrink dramatically, while simple graphics may see little change.
Which format is better for photos?
JPG, because it makes much smaller files with little visible loss.
Which format is better for logos?
PNG, because it keeps sharp edges and can be transparent.
Try it now: PNG to JPG — free, in your browser. Related guide: JPG vs PNG: Quality and When to Convert JPG to PNG