Free WebP to PNG Converter Online — Preserves Transparency

How to convert WebP to PNG

1. Drop your WebP files onto the converter above — or click to browse and select multiple files at once.
2. Click Convert on a single file, or Convert all to process the entire batch in one go.
3. Download each PNG individually, or click Download all to save everything as a single ZIP archive.
4. Tip: transparent WebP backgrounds are fully preserved in the PNG output — both formats support the full alpha channel, so no data is lost.

Your design assets never leave your browser

Design files, exported icons, and UI assets often contain unreleased product work. This converter processes every WebP file entirely inside your browser tab — no file is transmitted over the network at any point. Files are decoded in browser RAM via the File API and re-encoded to PNG using the Canvas API.

Disconnect from the internet right now and the converter will still work. Once the page has loaded, there is no server dependency at any step. Nothing is queued, nothing is cached on external infrastructure. 100% offline-capable by design.

// Converting WebP to PNG locally in your browser:
const reader = new FileReader();
reader.onload = (e) => {
  const img = new Image();
  img.onload = () => {
    const canvas = document.createElement('canvas');
    canvas.width = img.naturalWidth;
    canvas.height = img.naturalHeight;
    const ctx = canvas.getContext('2d');
    // Draw WebP — alpha channel is preserved automatically in PNG
    ctx.drawImage(img, 0, 0);
    // PNG output: lossless, full transparency, zero upload
    canvas.toBlob((blob) => { /* download */ }, 'image/png');
  };
  img.src = e.target.result;
};
reader.readAsDataURL(file);

Why convert WebP to PNG? — Compatibility and transparency

WebP became the dominant web format after Google pushed it for Core Web Vitals performance. As a result, nearly every image downloaded from a modern website arrives as a WebP file. The problem: design tools have been slower to adopt it.

Photoshop CS6–CC 2014, older Sketch builds, and Affinity Photo prior to v1.8 still fail to open WebP files. Converting to PNG restores full compatibility — PNG is natively supported in every image editor since the 1990s, with no plugins or updates required.

Transparency preservation is the second key reason. Unlike WebP-to-JPG — where transparent backgrounds fill with white — WebP to PNG keeps the alpha channel intact. Essential for logos, icons, and any UI asset composited in Figma or Illustrator.

WebP vs PNG — format comparison

When to convert to PNG and when to keep WebP

Convert to PNG when:

• Opening in Photoshop, Illustrator, or Affinity Photo — PNG is natively supported in all versions without plugins
• Working in Figma, Sketch, or InVision — PNG preserves alpha channels and displays correctly in design handoffs
• The image has a transparent background — PNG keeps the alpha channel intact; JPG fills it with white
• Submitting to a CMS or email template builder that does not accept WebP — older Mailchimp, Klaviyo, or Shopify theme editors
• Archiving for long-term storage — PNG lossless guarantees zero quality degradation across re-saves

Keep the WebP when:

• Serving images on a website or web app — WebP loads 25–34% faster than PNG, directly improving Core Web Vitals scores
• Storing animated images — animated WebP is more efficient than APNG and has broader browser support
• Your target viewer already supports WebP — all modern browsers, Android, iOS 14+, and macOS Big Sur+

How WebP to PNG conversion works in your browser

The browser's built-in WebP decoder parses the VP8/VP8L bitstream and rebuilds the full pixel grid — including the alpha channel — into an HTMLImageElement. The Canvas API draws it onto an off-screen canvas and exports the result via canvas.toBlob() with MIME type image/png.

PNG export is lossless by definition — no quality parameter to tune. The canvas captures every pixel exactly, including the full alpha channel. WebP transparency maps directly to the PNG alpha — which is why this conversion is pixel-perfect for icons, logos, and design assets.

// Simplified WebP to PNG conversion pipeline:
function convertWebPtoPNG(file) {
  return new Promise((resolve, reject) => {
    const img = new Image();
    const objectUrl = URL.createObjectURL(file);

    img.onload = () => {
      const canvas = document.createElement('canvas');
      canvas.width = img.naturalWidth;
      canvas.height = img.naturalHeight;

      const ctx = canvas.getContext('2d');
      // No fill needed — PNG supports the full alpha channel
      ctx.drawImage(img, 0, 0);

      // Export as PNG — lossless, transparency preserved, no upload
      canvas.toBlob(resolve, 'image/png');
      URL.revokeObjectURL(objectUrl);
    };

    img.onerror = reject;
    img.src = objectUrl;
  });
}