Mobile-First Index Tool
iWebSeoTool Mobile-First Index Tool: Enter a URL to run a free mobile-first index tool comparison of its mobile and desktop versions.
Enter a page URL. Our server fetches it twice — once with a mobile user-agent and once with a desktop user-agent — and compares the title, H1, canonical, robots tag, structured data, content and links, because search engines mainly index the mobile version. This is a basic fetch comparison, not a rendered test and not a Google result.
How to use it
- Paste the full URL of the page you want to compare, including https://.
- Run the comparison and wait for both versions to load.
- Review the rows marked different, then align the mobile version with the desktop version.
About this tool
Mobile-first indexing means search engines mainly judge a page by its mobile version, so a mobile vs desktop seo check is worth doing before you assume both versions match. This mobile first index checker fetches the same URL with a mobile user-agent and a desktop user-agent, then compares title, H1, canonical, robots, viewport, structured data, content words and links side by side.
Please note what this tool is and is not. It is a basic server-fetch check only — not Google’s official test, not a rendered-phone test, and it gives no Google score. It compares what the server sends, not how a phone renders the page, so google mobile indexing decisions still depend on the full live page. If the mobile version is missing content, it should carry the same main content and structured data as desktop. You can also try the Mobile-Friendly Test, the Website Speed Checker and the Word Counter from iWeb Seo Tool.
Frequently asked questions
No. The URL is fetched only to run the comparison, and it is not stored by this tool.
No. This is a basic server-fetch comparison only. It is not a Google result, it gives no Google score, and it does not show how Google will rank the page.
Yes. This basic mobile-first index comparison is free to use on iWeb Seo Tool, with no sign-up needed.
It compares the mobile and desktop versions for title, H1, canonical, robots, viewport, structured data, content words and links, and marks any differences.
Fix it: the mobile version should carry the same main content and structured data as desktop, so search engines do not miss anything important.
Mobile-first indexing means a search engine mainly uses the mobile version of a page for indexing and ranking, rather than the desktop version.
Because search engines now judge a page mainly by its mobile version. If mobile visitors see less content or different signals than desktop visitors, ranking and indexing can suffer.