Convert PNG to WebP — Free, Private, No Upload
Convert PNG images to high-quality WebP format instantly. No upload, batch processing, free.
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How to Convert PNG to WebP
Select your PNG files
Choose files or drag and drop them into the converter. Any image format is accepted.
Convert to WebP
Conversion starts automatically with optimized defaults. Adjust quality in advanced settings.
Download
Download converted files individually or as a ZIP archive.
Why Convert PNG to WebP?
WebP delivers the same visual quality as PNG at 25–40% smaller file sizes, making it the preferred format for websites and web applications. Converting your PNG files to WebP means faster page loads, lower bandwidth costs, and better performance scores on tools like Google PageSpeed Insights.
WebP supports both lossy and lossless compression, plus transparency — so you get all the benefits of PNG with significantly smaller files. Every major browser (Chrome, Firefox, Safari, Edge) supports WebP, making it safe to use across the web.
LeanImg runs the conversion directly in your browser without uploading your images to any server. Your files stay on your device from start to finish — completely private, completely free, no sign-up needed.
If you are optimizing images for a website, this is one of the most impactful changes you can make. After converting, use our compressor for additional savings. Need even more compression? Try PNG to AVIF for the latest in image efficiency.
PNG vs WebP
| Feature | PNG | WebP |
|---|---|---|
| File Size | Large | 25–40% smaller |
| Transparency | Yes | Yes |
| Compression | Lossless | Lossy or lossless |
| Browser Support | Universal | All modern browsers |
| Best For | Graphics, editing | Web delivery |
| Animation | No | Yes |
Frequently Asked Questions
How to convert PNG to WebP?
Open LeanImg in your browser, drop your PNG files into the converter, and download WebP versions instantly. It is free, requires no account, and your images are never uploaded anywhere. You can convert multiple PNG files to WebP in one batch.
Is it safe to convert PNG to WebP online?
Yes. LeanImg processes everything in your browser with no server upload. Your images never leave your device, never get stored remotely, and are never accessible to anyone else. The conversion uses local WebAssembly technology for fast, private processing.
How to convert PNG to WebP on Windows?
Open Chrome, Edge, or Firefox on your Windows PC and go to LeanImg. Drag your PNG files into the converter and download WebP files instantly. No software to download, no account needed. Works on any Windows version with a modern browser.
Does WebP support transparency like PNG?
Yes. WebP fully supports alpha transparency, just like PNG. Your transparent backgrounds, semi-transparent effects, and alpha channels are all preserved during conversion. WebP achieves this while producing significantly smaller files than PNG.