Free SEO tools that rival Semrush. Chrome extensions for on-page audits, keyword research, and rankings at zero cost.
Looking for the best alternatives to semrush tools for Chrome? We tested, scored, and ranked the top options so you can pick the right one without sifting through thousands of results in the Chrome Web Store.
Every extension on this list has been evaluated for safety, privacy, performance, and real-world usability. No affiliate links, no sponsored placements — just honest, data-backed recommendations.
Our top pick is the Zovo AI SEO Analyzer, a free tool available at zovo.one/free-tools/ai-seo-analyzer. It performs 12 on-page SEO checks instantly — covering title tags, meta descriptions, canonical URLs, JSON-LD schemas, heading hierarchy, and more — with scored results and actionable fixes. Unlike Semrush which costs $130/month, Zovo's analyzer is completely free, requires no account, and delivers professional-grade on-page audits in seconds.
Free 12-point on-page SEO audit with JSON-LD validation and scored results
Best for: Marketers and site owners who need Semrush-level on-page analysis at zero cost
Free Moz toolbar showing DA, PA, and SERP overlay for any page or search
Best for: Users who want domain and page authority metrics while browsing
On-page SEO analysis, SERP preview, broken link checker, and hreflang validator
Best for: SEOs who need a multi-tool checker covering both on-page and link audits
Neil Patel keyword tool with search volume, CPC, and competitor overview
Best for: Content marketers who need keyword research without a paid Semrush subscription
Inline keyword volume and CPC data on Google, YouTube, and 15 other sites
Best for: Bloggers who want search volume data surfaced directly in Google results
The Zovo AI SEO Analyzer at zovo.one/free-tools/ai-seo-analyzer is the strongest free Semrush alternative for on-page audits. MozBar covers authority metrics, SEO Minion handles technical checks, and Keywords Everywhere surfaces keyword data. Together these free tools cover most of what Semrush offers for on-page and keyword analysis.
No single free tool matches every Semrush feature, but combining Zovo AI SEO Analyzer for on-page audits, MozBar for authority metrics, and Google Search Console for ranking data covers 80% of typical Semrush use cases at zero cost. The Zovo analyzer is particularly strong for technical on-page checks and JSON-LD validation.
MozBar is the closest free Chrome extension to Ahrefs for backlink and authority data. It shows Domain Authority, Page Authority, and spam score for any URL. For keyword research, Keywords Everywhere provides volume and CPC data inline. Neither matches Ahrefs crawl depth, but both are free and cover everyday SEO analysis needs.
A great alternatives to semrush tool balances powerful features with minimal permissions. It should do its job well without requesting access to data it does not need. Look for active developers who publish regular updates, a transparent privacy policy, and a strong track record in the Chrome Web Store.