Add up to 30 PNG images (up to 50 MB each) and convert them to JPG, WebP or AVIF. Auto, the default, encodes each image as JPG and WebP and keeps the smaller one, skipping JPG when the image has transparency; pick AVIF yourself when you want it. The quality slider goes from 10 to 100 (default 85), transparent areas can be filled with a color for JPG, and the conversion runs in your browser.
How to use this PNG converter
- Click the upload area or drag in your PNG files.
- Choose the output: JPG, WebP, AVIF, or Auto for the smallest file.
- Set the quality to balance sharpness and file size.
- For JPG, choose a background color for transparent areas (white, black or custom).
- Download each file, or all of them as a ZIP.
For photos, AVIF or WebP at a quality of 70 to 85 gives good results in small files.
Why convert PNG to JPG, WebP or AVIF?
PNG is lossless and works well for graphics, interface elements and images with transparency. Photos saved as PNG, though, are usually much larger than they need to be. Converting them to a lossy format shrinks them a lot, which speeds up pages and improves Core Web Vitals.
Quick comparison
| Format | Compression | Transparency | Browser support | Best for |
|---|---|---|---|---|
| JPG | Lossy | No | Universal | Photos, social images |
| WebP | Lossy or lossless | Yes | All current browsers | Web images, mixed content |
| AVIF | Lossy | Yes | Current browsers | Smallest files |
WebP and AVIF usually beat JPG at similar quality. For the smallest files, start with AVIF; when compatibility comes first, use WebP or keep a JPG fallback. WebP also offers a lossless option here, and AVIF output from this tool is always lossy.
Tips for best results
Use a higher quality for hero banners and a lower one for thumbnails. If an image doesn't need transparency, a solid background usually makes the file smaller. Use AVIF for the smallest size, WebP for broad support, and JPG as a fallback when needed. Measure the effect on your pages with Lighthouse or WebPageTest.
Frequently asked questions (FAQ)
Does this tool upload my files?
No. Conversions happen in your browser, and your images don't leave your device.
What is the best format for SEO?
No format is best in itself. Use the smallest file that still looks right, for a faster Largest Contentful Paint (LCP) and better Core Web Vitals. AVIF and WebP usually give the smallest files.
What quality should I use?
Start around 75 to 85 for large, prominent images and 60 to 75 for smaller ones, then check the preview.