SEO Pulse SEO Extension

SEO Pulse SEO Extension is a powerful, one-click SEO audit tool for Chrome. Click the icon on any page and get 100+ instant SEO checks — no account needed, no data sent to servers, everything runs locally in your browser.
Updated March 2026 — SEO Pulse is changing how SEOs, developers, and content creators audit pages. While most SEO extensions give you a handful of basic checks, SEO Pulse goes deeper with server-side vs JavaScript render detection, live server health probes, format-aware schema analysis, and a full redirect chain tracker — all in one click, all for free.
The extension icon changes color the moment you land on a page:
🟡 Yellow = Actively running checks
🟢 Green = All good
🟠 Orange = Worth checking
🔴 Red = Critical issue (noindex / robots.txt block)

🏆 WHY SEO PULSE IS DIFFERENT
Most Chrome SEO extensions read what the browser already loaded and call it a day. SEO Pulse goes further:
→ It fetches your raw HTML independently and compares it against what JavaScript rendered — so you know exactly what search engines actually crawl, not just what users see.
→ It probes your server with live HTTP requests to test 404 handling, www redirects, trailing slash consistency, HTTPS enforcement, and URL case sensitivity — the kind of technical issues that silently tank rankings for months before anyone notices.
→ Its schema detection is format-aware. JSON-LD, Microdata, and RDFa are each detected using the correct HTML attributes — not a one-size-fits-all pattern that gives false results for two out of three formats.
→ Everything runs locally. No sending your URLs to a third-party server. No API keys. No subscriptions. No waiting for a dashboard to load. You land on a page, the icon pulses, and within seconds you have a complete picture.
Other SEO extensions were built to check a few tags. SEO Pulse was built to answer the question search engines actually ask: "Can I crawl this, understand it, and rank it?"

🔍 INDEXABILITY & CANONICALS
Instantly know if a page is indexable. Canonical URL detection — self-referencing, missing, or pointing somewhere else. Meta robots and X-Robots-Tag header analysis. Noindex detection with one-glance icon color feedback before you even open the popup.
📋 ON-PAGE SEO AUDIT
Title tag with character count and length validation. Meta description with character count. H1–H6 heading hierarchy with full visual tree. Word count, reading level, and estimated reading time. Language and charset detection. Missing OG tags automatically trigger the orange warning icon — even without opening the popup.
🧠 SSR vs JS DETECTION — KNOW WHAT SEARCH ENGINES SEE
This is one of SEO Pulse's most powerful and unique features. When JavaScript injects your title, description, canonical tag, or schema after page load, search engines may never see it — they don't always execute JS on every crawl. SEO Pulse fetches the raw HTML and checks each signal independently. Every title, meta description, canonical, H1, schema block, and hreflang tag gets an SSR or JS badge — shown inline next to the field name, no extra clicks. Hover any badge for a plain-English explanation. No other free Chrome SEO extension does this.
🛡️ SERVER HEALTH CHECKS
Five automatic server probes run live on every page you audit:

404 Handling — sends a request to a non-existent URL and checks whether your server correctly returns 404. Soft 404s (returning 200 for missing pages) waste crawl budget and can get junk pages indexed.
www / non-www — checks whether both versions redirect to one canonical. Duplicate homepages are one of the most common and overlooked SEO issues.
Trailing Slash — tests whether /page and /page/ both return 200. If they do, that's two indexable versions of the same content with split link equity.
HTTP → HTTPS — verifies your server issues a 301 (not 302) redirect from HTTP to HTTPS. A temporary redirect tells crawlers the insecure version might come back.
Case Sensitivity — uppercase paths like /About vs /about can create entirely separate indexable pages on Linux servers. SEO Pulse tests your live server and tells you exactly what it returns.

Each probe shows the exact URL tested and the server's response — full transparency into how we checked.
🔄 REDIRECT CHAIN TRACKER + LIVE BADGE
Real-time redirect count badge on the extension icon — appears as the page loads, no popup needed. Full redirect path visualization showing every hop (301, 302, 307). Multi-hop redirect detection — chains over two hops lose PageRank and slow down crawling. Status code at each step in the chain.
📊 SCHEMA & STRUCTURED DATA
JSON-LD, Microdata, and RDFa detection — all three formats. Schema type identification with full markup viewer. Validation with errors and warnings. SSR vs JS detection per schema block. Format-aware detection: JSON-LD uses @type matching, Microdata uses itemtype attribute, RDFa uses typeof — each searched correctly in raw HTML. Copy and export individual schema blocks. Summary legend shows at a glance whether your structured data is server-rendered or JavaScript-dependent.
🌍 HREFLANG & INTERNATIONAL SEO
Hreflang tag detection and validation. Reciprocal return link verification. Language and region tag mapping. HTTP status check per hreflang URL. SSR vs JS badge per tag — critical for international sites built on JavaScript frameworks.
🔗 LINKS & IMAGES ANALYSIS
Internal and external link counts with full URL lists. Nofollow link detection. Image alt text audit — missing, empty, and present counts. Lazy loading detection. Filterable link lists with anchor text. Broken link scanner on demand.
🤖 ROBOTS.TXT DEEP ANALYSIS
Full robots.txt parser with syntax highlighting. URL tester — check any URL against your live rules. User-agent specific rule breakdown. Crawl directive analysis per bot. X-Robots-Tag header detection. See exactly which rules apply to Googlebot, Bingbot, and every other crawler.
🗺️ SITEMAP DISCOVERY
Automatic sitemap detection from robots.txt and common paths. Sitemap URL extraction and total count. Sitemap index file support with child sitemap expansion.
⚡ CORE WEB VITALS
LCP, FCP, CLS, TTFB, INP — all in one panel with performance hints and improvement guidance.
📱 SOCIAL MEDIA PREVIEW
Open Graph validation — title, description, image, URL, type. Twitter Card validation. Live SERP preview showing exactly how the page appears in Google search results.
🛠️ QUICK TOOLS — ON-PAGE OVERLAYS

JavaScript toggle — disable JS and reload to see the no-JS version instantly
JS Compare — side-by-side rendered vs non-rendered iframe view
Highlight all headings on the page with color-coded overlays
Show full link URLs above every link on the page
Edit Page — make any text on the page editable for quick client mockups
Keyword density checker with location breakdown (title, description, H1, H2s, body)

🖱️ RIGHT-CLICK CONTEXT MENU
Highlight links by type (internal, external, nofollow — color-coded). Show page info overlay. Check if any page or link is indexed in Google. Open page or link directly in Semrush and Ahrefs.
📥 EXPORT FULL SEO REPORT
Generate a standalone HTML report with all 100+ audit results, SERP preview, heading structure, and Core Web Vitals — ready to share with clients or teammates. No login, no upload, no account.
🎨 CUSTOMIZABLE INTERFACE
Dark mode. Multiple font options. Background theme selection. SERP position counter for Google and Bing.

💡 BUILT FOR REAL SEO WORK
Whether you're doing a technical SEO audit for a client, debugging a crawl issue, checking if a competitor's schema is server-rendered, or trying to understand why a page isn't ranking — SEO Pulse gives you answers in seconds, not minutes.
It's fast because everything runs locally. It's accurate because it checks the raw HTML, not just the rendered DOM. And it's honest — if a check can't be determined, it shows nothing rather than showing a badge that might be wrong.
No upsells. No accounts. No bloat. Just 100+ checks, one click.

✅ PRIVACY FIRST
All analysis runs locally in your browser. No data is sent to external servers. No account required. Your URLs never leave your machine.
Built for SEO professionals, technical SEOs, developers, content creators, and anyone who wants to understand how search engines see their pages.
Created by Amrin Grewal — https://tseo.dev