PNG Compressor Online
Reduce PNG file size for screenshots, transparent graphics, and website images. Convert PNG to optimized WebP locally with no server upload.
Drag & drop images here, or click to upload
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Supports multiple files · no signup · no watermark
PNG Compressor Online · 100% browser-based · no server upload
Complete Guide to Converting Images to WebP
PNG files are useful for screenshots, transparent graphics, logos, and UI images, but they are often much larger than needed for web use. This free PNG compressor converts PNG files to optimized WebP while preserving transparency support.
All compression runs locally in your browser, so your PNG images are not uploaded.
How to Compress PNG Online
- Upload a PNG image or a batch of PNG files.
- Choose the WebP quality setting.
- Convert the PNG files locally in your browser.
- Compare original size, compressed size, dimensions, and savings.
- Download the smaller WebP files.
Best PNG Compression Settings
| PNG type | Suggested quality |
|---|---|
| Simple icons | 70–80% |
| UI graphics | 78–86% |
| Screenshots with text | 85–92% |
| Transparent product graphics | 82–90% |
Screenshots with text usually need higher quality than photos because small text and UI edges can show compression artifacts.
Does PNG Transparency Still Work?
Yes. WebP supports alpha transparency, so transparent PNG images can become smaller WebP files while keeping transparent backgrounds.
For a conversion-focused workflow, use PNG to WebP. For broad batches, use Image Compressor.
PNG Compressor for Website Speed
Replacing heavy PNG screenshots and graphics with WebP can reduce page weight and help improve Core Web Vitals. This is especially useful for blog tutorials, software docs, landing pages, and ecommerce graphics.
Related Tools
Use the PNG compressor above to make PNG images smaller for the web.
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.
Can I compress images without losing quality?
Any lossy compression can remove some image data, but high WebP quality settings usually look visually close to the original. Start around 80–85 quality and increase it if you notice artifacts.
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.
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.
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.
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