Vary: User-Agent HTTP Header Generator
Generate Apache and Nginx server configuration rules for `Vary: User-Agent` dynamic mobile serving.
Configured
> 48px
16px Base
No Penalty
What is the Dynamic Serving Header Builder?
The Dynamic Serving Header Builder by CompleteSEOTools is an enterprise mobile usability and accelerated web optimization utility built to ensure full compliance with Google Mobile-First Indexing standards.
How to Use the Dynamic Serving Header Builder (Step-by-Step)
Enter Configuration
Enter app names, image URLs, theme colors, or target webpage addresses.
Generate Code
Compile valid PWA manifests, responsive srcset markup, or viewport meta tags.
Deploy to Mobile
Deploy the tags into your website <head> or root server directory.
Google Mobile-First Indexing Guidelines
With mobile-first indexing, Google crawls and indexes pages using the smartphone Googlebot user agent. Ensure your mobile viewport is responsive, font sizes are legible without pinch-to-zoom, tap targets are separated by 8px padding, and intrusive full-page popups are eliminated.
Frequently Asked Questions (FAQs)
When the server returns different HTML depending on whether the visitor is on mobile or desktop at the same URL.