MVweb SEO Inspector

About

MVweb SEO Inspector — fast, private, free SEO analyzer for any web page. No accounts. No tracking. No external servers. Everything runs locally in your browser.

WHO IS IT FOR
SEO specialists, content editors, web developers, QA, marketers — anyone who needs to inspect on-page SEO setup quickly without leaving the page.

WHAT IT DOES
Click the toolbar icon on any page and get a structured popup with seven tabs:

— SUMMARY
Title and description with length validation, keywords, canonical (with self-canonical badge), Meta Robots, robots.txt status (Indexing allowed/blocked + per-UA rules), HTTP server response, X-Robots-Tag, hreflang with RFC 5646 validation, CMS / theme detection, technology stack, word count, tracker detection (analytics scripts, tag managers, ad pixels).

— HEADERS
H1–H5 outline with per-level filter, copy and export, 500-element cap.

— IMAGES
All images with filters (without alt / without title / Schema.org), https-only previews, 200-element cap.

— LINKS
Internal / external / anchor / mail / tel / script / image links with deduplication, occurrence count, rel-filter, search by URL or anchor, async HTTP-status check (12 parallel workers, 8s timeout, GET fallback for 405/501).

— SEARCH
Quick Google search operators: site:, intitle:, duplicate-title search.

— SOCIAL
Open Graph, Twitter Card, Schema.org Microdata, JSON-LD with collapsible tree-view.

— TOOLS
13+ shortcut links to external SEO validators covering page-speed testing, structured-data validation, HTTP security headers, accessibility audit, social-share preview, and web-archive lookup. Each link opens the corresponding service in a new tab with the current page URL pre-filled.

PAGE ACTIONS
— Highlight nofollow / sponsored / ugc links
— Highlight external links (border + ↗ marker)
— Show H1–H6 with inline labels
— Show ALT text in place of images (green frame for valid, red for missing)
— Toggle CSS on/off
— Copy summary in one click (configurable template)

EXTRAS
— Text statistics: top words / bigrams / anchor words with density (Snowball stopwords for English bundled)
— SERP numbering: position numbers next to organic results on Google (opt-in)
— Robots.txt parser with longest-match Allow/Disallow per Google spec

RUSSIAN SEARCH ENGINE SUPPORT (opt-in)
The extension includes optional support for the Russian search engine: site-quality score, search-console shortcuts, search-operator quick links, SERP numbering, and per-bot robots.txt rules. These features are HIDDEN by default in the English UI — enable them in Settings only if you need them.

PRIVACY-FIRST
— No accounts, no signup, no telemetry
— No data leaves your browser
— External counters (Yandex SQI) require explicit opt-in
— Private hosts (intranet, localhost, RFC 1918) are excluded from all external requests
— Full data-handling policy linked from the listing

OPEN APPROACH
Permissions kept minimal — activeTab + scripting + storage. host_permissions: <all_urls> is required only to (1) keep the toolbar icon active on every page, (2) fetch robots.txt and HTTP headers without CORS errors, (3) check link statuses on demand.

LANGUAGES
English, Russian.

KEYBOARD SHORTCUT
Alt+Shift+S (Windows / Linux), Ctrl+Shift+S (macOS) — opens the popup. Configurable in chrome://extensions/shortcuts.

WORKS ON
Chromium 109 or later.