WebP to Base64 Converter
Up to 10 MB. Nothing is uploaded — the file never leaves your device.
Use this in an <img src> attribute or a CSS url().
Without the data: prefix — for JSON payloads and APIs.
Your files stay private
This conversion runs entirely inside your browser. The image is never uploaded, so nothing you encode here reaches our server or anyone else.
About Converting WebP to Base64
WebP is already the compact one. A file that would be 40 KB as a PNG often lands around 15 KB as WebP, which means the 33% that Base64 adds hurts less in absolute terms than it would for any other format. That makes WebP an unusually good candidate for inlining — with one catch that has nothing to do with size.
How to convert WebP to Base64
- 1 Drop your .webp file onto the upload area.
- 2 The encoded forms appear at once, along with the size before and after.
- 3 Copy whichever form fits: data URI, raw string, or the CSS rule.
Inlining removes your fallback
The normal way to serve WebP is a picture element that offers WebP first and a JPG or PNG second, letting each browser take what it understands. A data URI cannot do that: it is a single string with a single media type, and a browser that cannot decode WebP simply shows nothing. Support is very wide today, so this rarely bites on the open web — but it does bite in email clients, in older embedded browsers, and in desktop applications that render HTML with an ageing engine.
Where it fits well
Anywhere you control the runtime and know WebP will decode: an internal dashboard, an admin panel, a browser extension, an Electron app, a design system shipped to a modern-only audience. In those places you get WebP compression and no extra request at the same time, which is about as good as inlining gets. On a public marketing page, where a fraction of a percent of visitors still matters, prefer a picture element and a plain file.
Caching is still the bigger loss
Because WebP files are small, people are tempted to inline a lot of them. That is where the second cost compounds: every inlined image lives inside the stylesheet, so a single change to one line of CSS invalidates all of them at once and the visitor re-downloads the whole set. Ten small images inlined can easily be worse than ten cached files. Keep the count low, keep each one genuinely tiny, and let the rest stay ordinary files that the browser can cache and reuse across pages.