Convert PNG to WebP
Convert a PNG image to WebP in your browser, keeping transparency, at one of three quality presets.
Converts PNG images to WebP while keeping transparency intact. Animated PNG is not supported.
Your images are processed on this device and are never sent to a server.
This browser doesn't support the features needed for PNG to WebP conversion
What this tool does
- Accepts PNG only, detected from the actual file structure.
- Converts to WebP at your choice of high, standard, or light quality — a single encode, not a target-size search.
- Preserves image dimensions; this tool never resizes.
- Built to keep transparency intact through the conversion.
How to use it
- Select one or more PNG images.
- Choose a quality preset: high, standard, or light.
- Convert and compare the resulting file size against the original.
- Download the WebP file.
Important limitations
- Only PNG is accepted; JPEG, HEIC, and WebP are not supported as input on this page.
- Animated PNG (APNG) is detected and rejected — this tool only handles static images.
- This is a fixed-quality conversion, not a target-size search; it won't get you to a specific output size directly.
- A smaller output file is not guaranteed for every image.
- Image dimensions are never changed by this tool.
Privacy
Conversion runs in a Dedicated Worker in your browser using Canvas. Your images are never uploaded to a server.
Frequently asked questions
Will my PNG's transparency survive the conversion?
Yes, the conversion is built to preserve transparency through to the WebP output.
Can I convert an animated PNG?
No, animated PNG (APNG) is detected and rejected before conversion.
Which quality preset should I choose?
Standard is the default and a reasonable balance; choose high quality for archival use or light for the smallest files.
Does this tool guarantee a smaller file?
No — most PNGs shrink when converted to WebP, but it isn't guaranteed for every image.
Can I get a specific output size instead of a quality preset?
Not from this page. This is a fixed-quality conversion; there's no target-size search here.