SEO JS Checker

by Adam King · agk-seo.com · Developer Tools

Established publisherManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Smart audits for JavaScript SEO: Quickly uncover how dynamic content, metadata & links are rendered to reveal JS-related SEO issues.

Users

524

+21 in 30 days

Rating

3.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#42K

#36K among extensions

Version

0.8.0

updated 7 May 2026

Users

monthly, 15 months

Latest, 15 Oct 2026: 524 usersMove the mouse over the chart for any month

Ratings count

monthly, 15 months

Latest, 15 Oct 2026: 2 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About SEO JS Checker

SEO JavaScript Checker – Smart Audits for JavaScript SEO SEO JS Checker is a Chrome extension that helps you identify critical JavaScript-related SEO issues. It fetches the page’s raw HTML and compares it to the live, client‑rendered DOM, highlighting differences across head tags, visible text, and links. Use it to quickly spot SEO risks introduced by client‑side rendering. What it does: - Head-tag comparisons: title, meta description, robots, canonical, preload, preconnect, hreflang, JSON‑LD, Open Graph, Twitter Card. - Visible text block diffs for major blocks/headings. - Link grouping: internal vs. external, with Added/Removed/Changed/Unchanged status. - Badge indicators: count of changed head items, HTTP status for non‑200, or an unsupported marker. - Popup tabs: Head, Changes, Links, Text – with filters and CSV export. Built for SEOs, developers, and site owners who care about how their content appears to Google—before and after JavaScript runs.