How to Convert PNG to JPG to Reduce File Size
PNG files are fantastic for preserving quality, but they come with a size penalty. A screenshot or photo saved as PNG can easily be 3-10 times larger than the same image as JPG. If you are uploading images to a website, sending them via email, or just trying to free up disk space, converting PNG to JPG is one of the fastest ways to shrink file sizes.
There is one important caveat: JPG does not support transparency. If your PNG has a transparent background, the conversion fills it with a solid color. Here is how to handle that and everything else about PNG to JPG conversion.
Step-by-Step Instructions
- Open the PNG to JPG converter
Go to imageconvert.co/png-to-jpg in any web browser. No signup, no download, no plugins needed.
- Drop your PNG files
Drag and drop your PNG images onto the converter, or click to browse. You can add multiple files for batch conversion.
- Adjust the quality slider
Set the JPG quality level. 85% is a strong default for photographs. For screenshots with text, try 90-95% to keep text crisp. Lower values produce smaller files with more visible compression.
- Download your JPG files
Conversion runs locally in your browser. Download files individually or as a ZIP. Check the before and after file sizes to see the savings.
How Transparency Is Handled
JPG does not support transparency. When you convert a PNG with a transparent background to JPG, the transparent areas are filled with a white background. This is the standard behavior across all conversion tools.
If your image has an important transparent background, such as a logo or product photo intended for layering, converting to JPG will destroy that transparency. In that case, keep the PNG or convert to WebP, which supports both lossy compression and transparency.
Choosing the Right Quality Setting
The JPG quality slider controls how aggressively the image is compressed. Higher values preserve more detail but produce larger files. For most photographs, 80-85% produces visually identical results to the PNG original at a fraction of the file size. For screenshots or images containing text, set quality to 90-95% to avoid blurring sharp edges.
Going below 70% introduces noticeable artifacts, especially around high-contrast edges and text. The sweet spot for general use is 82-88%, where file sizes drop significantly without visible degradation in most viewing contexts.
When NOT to Convert PNG to JPG
PNG to JPG conversion is not always the right move. Keep your files as PNG when transparency is needed (logos, icons, overlays), when the image contains sharp text or line art that JPG artifacts would damage, or when you need to make further edits to the file. Each JPG save introduces a new round of lossy compression.
For web images where file size matters but you also need transparency, consider converting to WebP instead. WebP supports both lossy compression and alpha transparency, giving you the best of both worlds.
Expected File Size Savings
The savings from PNG to JPG conversion vary by image content, but typical results are dramatic. A 5 MB PNG photograph converts to a 500 KB JPG at 85% quality with no visible difference. Screenshots with large areas of solid color see even bigger savings proportionally.
For a quick estimate: expect JPG files to be 70-90% smaller than the PNG originals for photographic content. Simple graphics with few colors may see less dramatic savings because PNG compresses them efficiently.
Frequently Asked Questions
Does PNG to JPG conversion lose quality?
Yes. JPG uses lossy compression, so some image data is discarded. At quality settings of 85% or higher, the visual difference from the PNG original is not noticeable for photographs.
What happens to the transparent background in my PNG?
JPG does not support transparency. Transparent areas are filled with white during conversion. Use WebP if you need both compression and transparency.
How much smaller will my files be?
Typically 70-90% smaller. A 5 MB PNG photo usually converts to a 300-800 KB JPG depending on the quality setting and image complexity.
Should I convert screenshots from PNG to JPG?
It depends. For screenshots of text-heavy content, JPG compression can blur text. Use quality 90-95% for screenshots, or keep PNG if text clarity is critical.
Are my files uploaded during conversion?
No. imageconvert.co processes everything in your browser. Your files never leave your device.