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What Is WebP?

WebP is a modern image format developed by Google that delivers superior compression for the web. It supports both lossy (smaller than JPEG) and lossless (smaller than PNG) modes, plus a full alpha channel for transparency. Standardised in 2010 and supported by all modern browsers since 2020 (Chrome, Firefox, Safari, Edge), WebP is now the default recommendation for performance-focused websites.

WebP Converter Online — What This Tool Does

This free WebP converter takes any PNG or JPG image and re-encodes it as a WebP file entirely in your browser. See the file size reduction live, then download the optimised image — no upload to a server required.

How to Convert to WebP

  • Drag a PNG, JPG, or existing WebP file onto the upload zone, or click to browse.
  • The tool re-encodes the image as WebP via the HTML <canvas> API.
  • Compare original vs converted file size — expect 25–35% savings vs JPEG, 50%+ vs PNG.
  • Click Download to save the .webp file.

Why Use WebP?

  • Smaller files — WebP is 25–35% smaller than JPEG at equivalent quality.
  • Better Core Web Vitals — smaller image payload improves Largest Contentful Paint (LCP).
  • Transparency support — unlike JPEG, WebP supports alpha channels.
  • Lossless mode — WebP-lossless beats PNG on file size for the same fidelity.
  • Widely supported — Chrome, Firefox, Safari, Edge all support WebP since 2020.

Tips & Tricks

  • Use WebP for web hero images — combine with our Image Resizer for maximum savings.
  • Provide fallbacks for older browsers — use the <picture> element with WebP first and JPG/PNG as the fallback.
  • WebP-lossless replaces PNG — for graphics and logos, lossless WebP is smaller without quality loss.
  • Test before deploying — verify the WebP renders correctly in your target browsers and CMS.

WebP vs JPG vs PNG

WebP beats both JPG and PNG on file size at equivalent quality. JPG remains the universal fallback for compatibility. PNG is the right choice when you absolutely need lossless graphics in a format every tool on earth understands. For new web content, default to WebP.

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Is My Image Sent to a Server?

No. WebP conversion runs entirely in your browser via the HTML <canvas> API. Your image file is loaded locally, drawn to a canvas, and re-encoded as WebP — there is no upload, no log, and no third-party processing.