WebP Info: Format, Dimensions, and Features
Drop in a WebP file to see how it is built: whether it uses the simple lossy, simple lossless, or extended container, its exact pixel dimensions, and which features it carries (transparency, animation, embedded EXIF metadata, and a color ICC profile). The file is read entirely in your browser and never uploaded.
How to inspect a WebP file
- Drag a .webp file onto the box, or click browse to pick one.
- Read the format, dimensions, and feature report that appears instantly.
- Check the badges to see if the image has alpha, animation, EXIF, or an ICC profile.
Examples
An animated sticker
sticker.webp (an extended/VP8X WebP)
Extended, 512 x 512, alpha + animation
A photo exported as WebP
photo.webp (a simple lossy/VP8 WebP)
Lossy, 1920 x 1280, no alpha
Frequently asked questions
Is my WebP file uploaded anywhere?
No. The file is read and parsed entirely in your browser using JavaScript. Nothing is sent to a server, so your image stays on your device.
How does this tool work without an upload?
WebP is a RIFF container. The tool reads the first few bytes of the file in the browser to confirm the RIFF/WEBP header, identify the bitstream chunk (VP8, VP8L, or VP8X), and decode the dimensions and feature flags. No image decoding or network request is involved.
What is the difference between lossy, lossless, and extended WebP?
Simple lossy (VP8) uses VP8 compression like a JPEG. Simple lossless (VP8L) preserves every pixel like a PNG. Extended (VP8X) is a container that can combine those with extra features such as transparency, animation, EXIF metadata, and an ICC color profile.
Can it tell if a WebP is animated or has transparency?
Yes. For extended (VP8X) files it reads the feature-flags byte and also scans the inner chunks, so animation, alpha transparency, EXIF, and ICC profile are each flagged. Lossless files report alpha from a dedicated bit in their header.
Why does my WebP show as extended even though it is just one image?
Encoders use the extended (VP8X) container whenever a file needs transparency, animation, EXIF, or an ICC profile, even for a single still frame. A plain photo with none of those usually stays in the simple lossy or lossless form.
Does it work on very large or very small images?
Yes. Simple WebP frames are read as 14-bit dimensions (up to 16383 pixels per side) and extended files use 24-bit canvas dimensions (up to 16384 per side), which covers the full range the WebP spec allows.
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