Quick answer: To convert PNG to WebP, add your PNG files, set the quality (85 is a good balance) and click Convert. WebP keeps transparent backgrounds and is usually smaller than PNG. The conversion runs in your browser, so your images are never uploaded.
How to use the PNG to WebP Converter
- Add your PNG files
- Keep WEBP selected and set the quality
- Click Convert and download your WebP files
About this tool
WebP is an image format designed for the web. It can store photos and graphics, supports transparent backgrounds like PNG, and usually produces smaller files. Converting a PNG to WebP is a common step when you want a faster page, a lighter email or a smaller upload. Your files are processed on your device and never uploaded.
Why convert PNG to WebP?
PNG is lossless, so photos and detailed images saved as PNG are often very large. Google, which developed WebP, says the format is designed to produce smaller files than PNG and JPEG for the same visual quality; real savings depend on the image and the quality you choose. Smaller images help pages load faster, which supports a better experience on mobile connections.
What to expect
- Transparency is kept. Transparent areas of your PNG stay transparent in the WebP.
- Quality setting. Use 85 for a good balance. Lower values give smaller files, with softer detail on photos.
- Screenshots and text. Sharp text and thin lines can show soft edges at low quality values. Use a higher value or keep those as PNG.
- Your original is safe. You download a new WebP file; the PNG is not changed.
Browser and device support
WebP images display in current versions of Chrome, Edge, Firefox and Safari. Very old browsers and some older apps cannot open them. To create WebP files, this tool needs a browser that can encode WebP; if yours cannot, you will see a message. Use a recent version of Chrome, Edge or Firefox in that case. If you need a format every program understands, convert to JPG instead.
Privacy and limits
Files are processed inside your browser and are not uploaded to FormatVolt. Each file can be up to 50 MB. Very large images can fail on devices with little memory, so try a smaller file or a desktop browser if that happens.
Frequently asked questions
Is it really free?
Yes. There are no limits, watermarks or sign-ups.
Does WebP keep transparent backgrounds?
Yes. Transparent areas in your PNG stay transparent in the WebP file.
Will the WebP be smaller than the PNG?
Usually, especially for photos and detailed images. The saving depends on the picture and the quality you choose.
Why do I get an error saying my browser cannot create WebP?
Some browsers cannot encode WebP files. Use a current version of Chrome, Edge or Firefox.
Are my images uploaded?
No. The conversion happens in your browser and your files never leave your device.
Sources and references
More free tools
Last updated: November 10, 2026