# WebP detection is based on file extension, not the actual file type

**URL:** https://discuss.httparchive.org/t/webp-detection-is-based-on-file-extension-not-the-actual-file-type/1103
**Category:** Analysis
**Created:** [October 17, 2017, 10:26am UTC](https://discuss.httparchive.org/t/webp-detection-is-based-on-file-extension-not-the-actual-file-type/1103 "2017-10-17T10:26:21Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![igorvaryvoda](https://yyz1.discourse-cdn.com/flex035/user_avatar/discuss.httparchive.org/igorvaryvoda/32/908_2.png) [@igorvaryvoda](https://discuss.httparchive.org/u/igorvaryvoda)
#### Post date: [October 17, 2017, 10:26am UTC](https://discuss.httparchive.org/t/webp-detection-is-based-on-file-extension-not-the-actual-file-type/1103/1 "2017-10-17T10:26:21Z")

</div>

Hi guys, the “Image requests by format” isn’t very representative, because it probably uses only the file extensions to build this pie chart.  
Example - [http://httparchive.org/viewsite.php?pageid=81934971#imageformats](http://httparchive.org/viewsite.php?pageid=81934971#imageformats)  
WebP share is zero.  
There’s plenty of WebP images on the page though  
 ![image](https://cdck-file-uploads-canada1.s3.dualstack.ca-central-1.amazonaws.com/flex035/uploads/httparchive/original/1X/fb6040e36407031205edca8b0724fdeee367c354.png)