Convert PNG to WebP Online

Shrink PNG files by 50–70% by converting to WebP, with transparency intact. Runs entirely in your browser.

Use this tool
Image Format Converter
Convert between PNG, JPG, and WebP formats.
Open Image Format Converter →

Why this matters

PNG is indispensable for sharp graphics and transparent assets, but it's bulky for delivery on the web. WebP provides near-identical visual quality at dramatically smaller sizes — and supports transparency just like PNG. Switching site assets from PNG to WebP is one of the fastest ways to improve Google PageSpeed scores and Core Web Vitals without sacrificing visual quality.

Step by step

  1. 1
    Open the Image Format Converter
    Drop your PNG file in.
  2. 2
    Select WebP as the output
    Choose WebP from the format list.
  3. 3
    Set quality
    85% gives an optimal balance between file size and visual fidelity. Push to 90%+ for pixel-level accuracy.
  4. 4
    Convert
    The PNG is encoded to WebP in your browser.
  5. 5
    Download
    Save the WebP and use it in your website, app, or project.

Frequently asked questions

How much smaller is WebP compared to PNG?

Typically 50–70% smaller for photos and complex graphics, and 25–40% for simple UI assets, at equivalent perceptible quality.

Does WebP support PNG's transparency?

Yes. WebP has full alpha channel support, so transparent PNGs convert cleanly with no background fill.

Do all browsers support WebP?

Yes — Chrome, Edge, Firefox, Safari 14+, and all major mobile browsers. For legacy IE 11 or very old Safari, keep a PNG fallback.

Is the conversion lossy?

At the default 85% quality setting, slight lossy compression is applied for the best size reduction. Set quality to 100 for lossless WebP output.

Is my PNG sent anywhere when converting to WebP?

No. The converter runs in your browser; your file never leaves your device.

Should I replace all PNGs on my site with WebP?

For most use cases yes, especially hero images, product shots, and large graphics. Use the <picture> element to serve WebP with a PNG fallback for edge-case browser support.

Try Image Format Converter now
Free, private, no signup. Runs in your browser.
Open Image Format Converter →

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