Compress PNG Online
Make PNG screenshots, graphics, and transparent images smaller by converting them to optimized WebP. All compression happens locally in your browser.
Drag & drop images here, or click to upload
PNG
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Supports multiple files · no signup · no watermark
Compress PNG Online · 100% browser-based · no server upload
Complete Guide to Converting Images to WebP
PNG files are great for screenshots, UI graphics, and transparent images, but they can be much larger than needed for websites. This free compress PNG tool makes PNG images smaller by converting them to optimized WebP while preserving transparency support.
All processing happens in your browser, so your PNG files are not uploaded.
How to Compress PNG Online
- Upload a
.pngfile or a batch of PNG images. - Pick a quality setting for WebP output.
- Convert locally in your browser.
- Download smaller WebP files.
The tool shows original size, compressed size, dimensions, and savings percentage after conversion.
PNG to WebP Compression
For web delivery, WebP is often much smaller than PNG and supports alpha transparency. This makes it useful for:
- Transparent logos
- UI screenshots
- Product graphics
- Blog illustrations
- Documentation images
If you need a PNG file as the final output, use WebP to PNG after conversion, but for websites WebP is usually the better delivery format.
Recommended Settings
| PNG type | Suggested WebP quality |
|---|---|
| Screenshots | 80–88% |
| Transparent graphics | 82–90% |
| Simple illustrations | 75–85% |
| Small thumbnails | 70–78% |
Read PNG vs WebP to understand when WebP is the better choice.
Related Tools
Compress PNG files to smaller WebP images using the tool above.
Frequently Asked Questions
Common questions about WebP conversion and privacy.
Does compressing PNG keep transparency?
Yes. PNG files are converted to WebP, which supports transparency. This often creates much smaller web-ready files while preserving transparent backgrounds.
Is WebP better than PNG?
For photos and complex images, WebP lossy compression is much smaller than PNG. For graphics requiring lossless quality or exact pixel fidelity, PNG or WebP lossless may be preferred.
What quality setting should I use?
For most web use, a quality setting of 75–85 provides an excellent balance between file size and visual quality. Lower values reduce file size further; higher values preserve more detail.
Are my images uploaded to a server?
No. All conversions happen entirely in your browser using the Canvas API. Your images never leave your device, making this tool fully private and secure.
How does WebP improve SEO?
Smaller images load faster, which improves Core Web Vitals metrics like Largest Contentful Paint (LCP). Google uses page speed as a ranking factor, so optimized images can help your SEO.
Can I convert multiple images at once?
Yes. Drag and drop multiple files or select them using the file picker. Each file is converted individually and you can download them one by one or use Download All.
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