PNG to JPG Conversion Notes
Transparency becomes white background
JPG does not support transparency. Any transparent areas in your PNG will be filled with a white background in the JPG output. If you need a different background color, use an image editor first.
Quality is permanent
Once you save as JPG, quality loss is irreversible. Set the quality level as high as your file size requirements allow. 85-90% quality is a good balance for most photos.
Best for photos, not graphics
JPG works well for photographs but creates visible artifacts around text, logos, and sharp edges. Keep graphics, logos, and screenshots as PNG.
When to convert
Convert PNG photos to JPG when you need smaller file sizes for web upload, email attachments, or social media. The quality loss is often not visible for photographs.
How to Convert PNG to JPG in 3 Steps
Upload Your PNG File
Click the upload area or drag and drop your PNG image directly onto the page. You can select any PNG file including those with transparency, grayscale, or indexed color modes. The tool displays your filename and original file size instantly.
Adjust the Quality Slider
Move the quality slider from 50% to 100% to set your preferred compression level. Higher values (85-95%) are recommended for photos where quality matters. Lower values (50-70%) create smaller files suitable for web thumbnails or email. Watch the size decrease as you adjust.
Convert and Download
Click the Convert button. Processing completes in your browser within seconds - no server upload needed. A preview appears alongside the file size comparison. Click Download JPG to save your converted file with the .jpg extension automatically applied.
PNG vs JPG Format Comparison
Understand the key differences to decide when conversion makes sense for your workflow.
| Characteristic | PNG Format | JPG Format |
|---|---|---|
| File Size (typical photo) | 2-4 MB | 400-600 KB (at 90% quality) |
| Transparency Support | Yes (alpha channel) | No (requires solid background) |
| Compression Type | Lossless (no quality loss) | Lossy (permanent compression) |
| Best Use Case | Screenshots, logos, graphics with sharp edges | Photographs, realistic images, web imagery |
| Editing Capability | Preserve all data through multiple edits | Quality degrades with each save |
| Browser Compatibility | 100% support across all browsers | 100% support across all browsers |
Should You Convert Your PNG to JPG?
Convert to JPG When...
You have a photograph and need a smaller file for web upload, email attachment, or social media. JPG reduces file size 5-10x at 90% quality with virtually no visible difference for realistic images. This is ideal for sharing photos online.
Keep as PNG When...
Your image contains transparency, is a screenshot, has text or logos, or features sharp graphic elements. PNG preserves transparency and avoids compression artifacts around edges. If you plan to edit further, PNG's lossless format prevents quality degradation across multiple saves.
Real Limitation to Know
Once converted to JPG, quality loss is permanent and irreversible. You cannot recover transparent areas or restore the original sharpness by converting back to PNG. Always keep the original PNG file as a backup before converting.
Practical Tip
Start with 90% quality for most photos - it balances visual quality with significant file size reduction. For web thumbnails or email, try 75%. For print or archival, use 95-100%. Use the preview to verify the result before downloading.
Common Problems and Fixes
Transparent Areas Turned White
This is expected behavior. JPG does not support transparency, so all transparent pixels in your PNG are automatically filled with white. If you need a different background color, use an image editor to fill transparency before converting, or use a format like WebP that supports transparency with better compression than PNG.
Quality Looks Blocky or Pixelated
You likely set the quality slider too low. Artifacts like blocky patterns and color banding appear below 70% quality. Try 85-90% for photos. If blockiness persists at high quality, the image may contain many sharp edges or gradients - keep it as PNG instead, or pre-process with a blur filter before converting.
File Size Barely Reduced
This happens with non-photographic images like screenshots, diagrams, or logos. These contain sharp edges and flat colors that compress poorly with JPG. PNG is actually the better choice for these. JPG excels with natural photographs where the 5-10x size reduction is most dramatic.
Text or Logos Look Blurry
JPG compression creates visible artifacts around sharp edges, text, and fine details. This is a limitation of lossy compression, not a tool issue. Convert only the photo portions to JPG and keep graphics as PNG. For mixed content, PNG remains your best choice despite larger file size.