PNG to WebP Converter
Convert one static PNG to WebP locally. Choose WebP quality, keep the dimensions, and verify the downloaded result.
Static PNG only · up to 25 MiB · 40 megapixels
Private: the image is processed locally
Higher quality can use more bytes. The setting is applied only when you press Convert to WebP.
How to convert PNG to WebP
- Choose one valid static PNG within the 25 MiB and 40 megapixel limits.
- Set the WebP quality. Higher values can retain more detail but may use more bytes.
- Press Convert to WebP, check the actual dimensions and file size, then download the verified result.
PNG and WebP
PNG is a lossless container that commonly carries interface graphics and transparency. WebP supports transparency and can use lossy quality encoding, so RGB pixels may change while the decoded Alpha channel remains available.
Decoded transparency is kept
The browser Canvas is created with transparency enabled for this direction. Fully transparent, semi-transparent, and opaque areas are carried into the WebP encode when the browser supports WebP Alpha.
Quality affects RGB, not a fixed byte target
The 10–100 WebP quality control changes the encoder trade-off. It does not promise lossless RGB, a particular file size, or a fixed visual difference.
Static PNG input only
APNG animation is rejected before conversion. PicRecast does not silently choose one animation frame for a WebP download.
The output may be smaller or larger
WebP output size depends on image detail, alpha content, dimensions, and selected quality. PicRecast reports the real source and output bytes instead of promising savings.
Limitations
This tool handles one static PNG at a time. It does not resize, improve quality, remove backgrounds, guarantee lossless RGB, or promise to retain every metadata field.
Private browser processing
Validation, decoding, Alpha handling, and WebP encoding stay in your browser. The image is not sent to a conversion API, provider, or storage service.
Frequently asked questions
Will transparent PNG pixels stay transparent?
The conversion uses an Alpha-enabled Canvas and encodes WebP with transparency preserved when supported by the browser. The output should be rechecked after download.
Is PNG to WebP lossless?
Not for RGB at the normal quality setting. WebP quality encoding can change RGB values; this page does not claim exact pixels or lossless output.
Can I convert an APNG?
No. Animated PNG is rejected so the tool does not silently export only one frame.
Is my PNG uploaded?
No. Validation, decoding, and WebP encoding run locally in your browser.
Related tools
Need a lossless PNG output or a compression workflow? PNG to JPG · WebP to PNG · Compress PNG