PNG to WebP Converter
Convert PNG images to smaller WebP files, with quality control.
Processed on your device — never uploaded
WebP keeps transparency and is usually 25–35% smaller than PNG.
What Is This Tool?
This tool re-encodes a PNG as WebP, a format that supports transparency like PNG but produces much smaller files. You can choose the quality: higher values look closer to the original, lower values save more space. WebP is supported by every current browser and is a good default for the web.
How It Works
Drop a PNG onto the box or click to select one.
Set the Quality slider (80–90 keeps it looking sharp).
Compare the preview and the file-size saving shown below.
Click Download WebP.
Everything runs locally in your browser — the image you choose is decoded onto an HTML canvas on your own device and is never uploaded to a server.
Features
- Adjustable WebP quality
- Transparency preserved
- Typically 25–35% smaller than the source PNG
- Instant size comparison before download
- Runs fully in the browser
Common Use Cases
- Cutting image weight on a website to improve load time
- Reducing the size of UI icon sets and illustrations
- Fitting images under an upload size limit
- Modernising an old asset library to WebP
Frequently Asked Questions
Is WebP safe to use on my website?
Yes. Every major browser released in the last several years supports WebP. For very old clients you can keep a PNG fallback with the <picture> element.
Does WebP keep transparency?
Yes, WebP has a full alpha channel, so transparent PNGs convert without a background being added.
Lossy or lossless?
This tool uses lossy WebP with the quality you pick, which is where most of the size saving comes from. At 85 and above the difference is usually hard to spot.
Why is my WebP not smaller?
Very small images, or images that are already simple flat colour, may not shrink much. The saving is largest on detailed or photographic PNGs.
Is anything uploaded?
No. The browser performs the WebP encoding locally.