# Mobile-First Indexing Tester

> Check your page against key mobile-first readiness criteria. Critical failures in mobile parity can suppress your rankings.

**Category:** Technical

## How it works

The Mobile-First Indexing Tester runs directly against a live URL or your own pasted content — no signup, no install. Results come back in seconds as a prioritized, plain-English list rather than a raw score, so you know exactly what to fix first and why it matters. It's a focused, single-purpose check, built to answer this one question quickly rather than replace a full technical audit.

1. Enter the relevant input for your page or project.
2. Review the tool's output and the reasoning behind each recommendation.
3. Apply the changes it surfaces to your actual page or content.
4. Re-check after publishing to confirm the fix took effect.

**Why it matters:** Technical SEO is the foundation everything else sits on: if a page can't be crawled efficiently, rendered correctly, or loaded fast enough, no amount of content or backlinks fixes that. Most technical issues are invisible until you specifically look for them.

This is a free, interactive, browser-based tool — no signup required. It runs client-side JavaScript, so this Markdown page describes what it does; [use the live tool](https://iliassami.com/tools/mobile-first-tester) to actually run it.

## Related tools
- [robots.txt Generator](https://iliassami.com/tools/robots-txt-generator)
- [XML Sitemap Generator](https://iliassami.com/tools/xml-sitemap-generator)
- [Core Web Vitals Calculator](https://iliassami.com/tools/core-web-vitals)
- [Crawl Budget Simulator](https://iliassami.com/tools/crawl-budget-simulator)

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_Canonical page: [https://iliassami.com/tools/mobile-first-tester](https://iliassami.com/tools/mobile-first-tester) · Markdown generated on request from the live site content._