Mercek SEO – SEO Checker & On-Page Audit, SERP Preview, Speed Test

One-click SEO checker: indexability, canonical, headings, alt text, schema, SERP preview and speed test. Optional AI review.

Mercek SEO runs a one-click SEO check on the page you are viewing and shows, in order of priority, what is fine and what needs fixing. No account, no dashboard, no leaving the page. What it checks • Indexability: robots meta tag, X-Robots-Tag, canonical URL • Title and meta description: length, pixel width, whether Google will truncate them • Heading structure: H1–H6 hierarchy and skipped levels; click a heading to jump to it on the page • Links: internal and external links, nofollow, redirecting URLs • Images: missing alt text, large content images • Structured data (schema), hreflang and Open Graph tags • Speed: LCP, CLS, FCP, TTFB and load times • Content: word and sentence counts, readability, most frequent words and two-word phrases SERP preview See how the page will look in Google results on desktop and mobile before you publish. Score and report Each page gets a score out of 100, and the issue costing the most points is highlighted. Copy the report as text or JSON, or export the heading list as CSV. Optional AI review Add your own API key (Anthropic, OpenAI, Google Gemini or OpenRouter) to get an extra review of the page text. While this feature is off, the extension sends no data to any outside service. Privacy The analysis runs in your browser. No sign-up, no tracking, no ads. The extension only reads the tab you click its icon on. AI settings and your API key are stored only in your own browser. Works on any site: Shopify, WordPress, custom platforms and local development (localhost). Interface available in English and Turkish.