There is no single, official tool provided by Google or a third party that can definitively "check" your site and guarantee AdSense approval. AdSense approval is based on a comprehensive review process that assesses various factors related to your site's content, quality, user experience, and compliance with AdSense Program policies.

However, you can perform checks and optimizations on your site to increase your chances of approval by aligning with Google's guidelines:

1. Content Quality and Originality:

- **Create Helpful, Reliable, People-First Content:** Ensure your content is original, well-written, informative, and provides value to users. Avoid low-value content, content generated by AI without significant human oversight, or content heavily reliant on information gathered from other sources without adding unique insights. - **Demonstrate E-EAT (Experience, Expertise, Authority, Trustworthiness):** Establish your credibility and expertise within your niche. - **Avoid Duplicate Content:** Ensure your content is unique and not plagiarized from other websites. Be mindful of how articles are categorized to prevent unintentional duplication.

2. User Experience and Site Structure:

- **Easy Navigation:** Your site should be easy to navigate with a clear and logical structure. - **Fast Loading Speed:** Optimize your site for speed to provide a good user experience. Tools like Google PageSpeed Insights can help with this. - **Mobile-Friendly Design:** Ensure your site is responsive and displays well on all devices. - **Mandatory Pages:** Include essential pages such as a Privacy Policy, Terms of Service, and a Contact Us page.

3. Technical Compliance:

- **SSL Certificate:** Secure your site with an SSL certificate (HTTPS). - **Compliance with Webmaster Guidelines:** Adhere to Google's Webmaster Guidelines, which are integral to AdSense policies.

4. AdSense Policy Compliance:

- **Review AdSense Program Policies:** Thoroughly understand and comply with all AdSense Program policies regarding prohibited content, traffic sources, and ad placement.

5. Monitoring and Improvement:

**Google Search Console:**

Use Google Search Console to monitor your site's performance in search results, identify any crawling or indexing issues, and address potential problems.

**Google Analytics:**

Track your site's traffic and user behavior to understand how users interact with your content and identify areas for improvement.

While no single tool can provide a definitive "ready for AdSense" check, diligently addressing these areas will significantly improve your site's quality and increase its likelihood of AdSense approval.