CompressX Documentation

Everything you need to install, configure, and get the best performance from CompressX Free and Pro.

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Check whether WebP/AVIF takes effective

Jan 7, 2026 | Docs

Learn how to verify that WebP and AVIF images are actually being delivered to visitors.

Step 1: Open a Page Containing Images

Visit any front-end page on your website where images are displayed (posts, pages, products, etc.).

Step 2: Open Browser Developer Tools

  • 1. Right-click on the page and select Inspect, or
  • 2. Use keyboard shortcuts:
    Windows / Linux: F12 or Ctrl + Shift + I
    macOS: Cmd + Option + I

Open Browser Developer Tools - Inspect

Step 3: Check the Network Tab

Check the Network Tab

  • 1. Switch to the Network tab in Developer Tools.
  • 2. Refresh the page to reload all assets.
  • 3. Filter by Img (images).

Step 4: Confirm Image Format

Click on any image request and check:

  • 1. The Type column, or
  • 2. Response Headers → Content-Type

If you see:

  • webp
  • avif

then WebP or AVIF is successfully taking effect.

 

Notes
1. WebP/AVIF is served only to supported browsers.
2. Unsupported browsers will automatically fall back to JPG/PNG.
3. CDN or browser caching may require clearing before changes appear.
4. Always verify using Developer Tools, not by visual inspection alone.