WebP to Base64 Converter

WebP to Base64, explained

Encoding a WebP to Base64 turns the image's binary data into a plain-text string you can embed directly in your code. WebP is a modern format that compresses smaller than PNG or JPG at similar quality and supports both transparency and animation — so its Base64 strings tend to be shorter than the equivalent PNG.

How to use it

<img src="data:image/webp;base64,UklGRni..." alt="image" />

.hero { background-image: url(data:image/webp;base64,UklGRni...); }

Browser support

A Base64 WebP data URI shows up in any browser that supports WebP — which today is every modern browser (Chrome, Firefox, Safari, Edge). Encoding to Base64 doesn't change format support; it only changes how the same bytes are delivered. If you must support very old browsers, keep a PNG/JPG fallback.

Keep an eye on size

Base64 still adds about 33% over the raw file and inlined images can't be cached on their own. WebP's strong compression softens the hit, but for large images a normal cached .webp file is usually faster. Reserve inlining for small icons, thumbnails and single-file deliverables.

Lossy, lossless, and animated WebP

WebP has three common flavors: lossy (VP8), lossless (VP8L), and animated. This tool encodes the file bytes as they are, so animation and alpha survive. The data URI always uses data:image/webp;base64, and the body starts with UklGR (RIFF). Inlining a long animated WebP is usually worse than a cached file — keep inlining for small static assets.

Private by design

The conversion runs locally with your browser's FileReader API — no upload, no server.

Example: a real WebP, converted

Below is a 236-byte WebP icon (96×96, lossless). Converted with this tool it becomes a 316-character Base64 string — about 34% larger than the original file, exactly the Base64 overhead in action. The image on the left is rendered from nothing but that data URI:

<img src="data:image/webp;base64,UklGRuQAAABXRUJQVlA4TNgAAAAvX8AXEBcgEEii3d9gDYFAEuT+Ks///Af8BRzVtu00LIZIwc8lRQIqMME8vTyZlPfOLyuZRvTfkdtGjsTJu8cK/kPzJw5zj9bz8ZljskDnPuHDQq3zDT8vsd75B/5hBv+YiC7NhejTfAgrw5C2TtKXGSQhoxZPl/uUCG18Y+PWM3bemj3+P1JMO9/IuPfM5bw35zLsqTQ5vr9fNXXJ3w/5+433Le5zPhd8jvjc4Tnlc433QIa9Uf++qmav5t/n+fOC5w7OKZ5rPAd5buKc5bmMczwh93/q0QA=" width="96" height="96" alt="icon" />

Paste that <img> tag into any HTML file and the icon renders — no file, no request, no server round-trip. That is the whole point of inlining: the image is the code.