Convert PNG to WebP Online Free
Convert PNG images to WebP format while preserving background transparency. Significantly reduce file size for web assets without sacrificing visual quality.
Drag & drop files here
or click to browse files
Files are processed locally in your browser
How to Convert PNG to WebP
Step 1
Upload your PNG images by dropping them or clicking to select.
Step 2
Choose whether to use lossless compression (best for graphics/logos) or lossy compression.
Step 3
Click the "Convert" button to run the local browser-based transformation.
Step 4
Save the transparent WebP files back to your local folder.
About the PNG & WebP Formats
PNG (Portable Network Graphics)
PNG is a raster-graphics file-format that supports lossless data compression. It was created as an improved, non-patented replacement for Graphics Interchange Format (GIF).
- Lossless compression retains perfect quality
- Supports full transparency (alpha channel)
- Excellent for graphics, text, and line art
- Significantly larger file sizes than JPG for photographs
- Does not support animation (unlike APNG which is less compatible)
- Not optimized for print graphics (no CMYK support)
WebP (Web Picture Format)
WebP is a modern image format developed by Google that provides superior lossless and lossy compression for images on the web. It allows webmasters to create smaller, richer images.
- Typically 25-34% smaller file sizes compared to PNG and JPEG at equivalent quality
- Supports both lossy and lossless compression
- Supports transparency and animation
- Slightly higher CPU overhead for compression/decompression
- Older browsers (like IE11 or older Safari versions) do not support it
PNG vs WebP Comparison
| Feature | PNG | WebP |
|---|---|---|
| Type (类型) | Raster Graphics (位图) | Raster Graphics (位图) |
| Transparency (透明度) | Yes (支持) | Yes (支持) |
| Animation (动画) | No (不支持) | Yes (支持) |
| Compression (压缩) | Lossless (无损压缩) | Lossy / Lossless (有损/无损) |
| Compatibility (兼容性) | Universal (完美兼容) | High (现代浏览器全兼容) |
Frequently Asked Questions
Will my converted WebP image keep its transparent background?
Yes. WebP natively supports alpha channel transparency just like PNG. The converter will fully retain the transparent portions of your image.
Is lossless PNG to WebP conversion supported?
Yes. The converter uses the browser's Canvas rendering engine which supports lossless configurations. If you keep the quality slider at 100%, the browser performs a high-fidelity output.