Know your formats
Supported formats and limitations
Accepted formats are checked from file contents. Native browser codec support is required. Only still images are supported.
- Input formats
- PNG
- Output formats
- WEBP
- Requires a genuine browser WebP encoder. PNG fallback output is rejected, never renamed to WebP.
- Canvas WebP encoding is not promised to be lossless; source metadata is discarded.
The WebP output can retain transparent pixels, while the browser’s quality setting controls lossy color encoding. High quality starts at 95%, and Smaller file uses 65%. Neither setting guarantees a particular byte size. Use the PNG source when you need to preserve the original encoded file.
Limits: 16 MiB per file, 8192px per edge, 8 megapixels. Batch input is limited to 8 files / 32 MiB, and retained batch outputs to 64 MiB. Metadata is discarded; color profiles and HDR may change.
A local workflow
How to use this converter
Your file contents stay in the browser as you work.
Choose a PNG graphic.
Choose a supported WebP quality level.
Compare the export and save it.
A little more clarity
Frequently asked questions
Will lossless WebP be available?
Lossless encoding is not promised. It depends on the selected encoder rather than the PNG source alone.
Is PNG to WebP available now?
This tool runs locally with JavaScript enabled. Check its supported formats and size limits before converting.