WebP encoder unavailable
Very old browsers (Safari < 14, Chromium < 32) do not expose `toBlob('image/webp')`.
Fix: Use a recent version of Chrome, Edge, Firefox, or Safari. The tool prints a clear error if the encoder is missing.
Base64 to WebP Converter
Re-encode a Base64 image into modern WebP output with quality control and client-side download
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What is Base64 to WebP Converter
Written by Giorgos Kostas. Last reviewed:
WebP is a modern image format that delivers smaller files than PNG and JPG at comparable quality, with support for transparency and animation.
Base64 to WebP Converter decodes any Base64 image (PNG, JPEG, WebP, GIF) in the browser and re-encodes the first frame as WebP using `HTMLCanvasElement.toBlob`.
Why use it
- Shrink an inline PNG or JPG by converting it to WebP for modern browsers.
- Recover and convert images stored as Base64 in databases or API payloads.
- Preserve transparency when converting from PNG.
- Runs entirely in your browser.
Features
- Browser-native WebP encoder
- Auto-detect source format
- Transparency preserved
- ~92% quality
- Decoded WebP preview before download
- WebP decoded on-device
How to use Base64 to WebP Converter
- Paste Base64. Paste a data URL or raw Base64 string.
- Decode. Click Decode to WebP — the preview appears instantly.
- Download. Click Download WebP to save the file.
Example (before/after)
Base64 data URL
data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEASABIAAD…
Downloaded WebP
base64-to-webp.webp (binary, 14 KB, 92% quality)
Common errors
Animation is dropped
WebP conversion uses a canvas and only captures the first frame.
Fix: To preserve animation, keep the source as GIF or animated WebP.
FAQ
Is my data uploaded?
No. Decoding and WebP encoding happen entirely in your browser.
What quality is the output?
The WebP is encoded at ~92% quality for a good balance between size and fidelity.
Can it convert animated GIFs to animated WebP?
No — the canvas API captures only the first frame. Use a dedicated video/animation tool for that.
Is transparency preserved?
Yes, when the source image supports alpha.
Related tools
Related decoders and image tools: You can also browse the full Image Tools category for more options.
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