Site Signal — Chrome 网站流量与 SEO 检测

轻量Chrome网站流量与SEO分析扩展（Manifest V3）：估算访问量、自然搜索关键词、域名权重、外链概况、标题与描述等元标签、站内基础体检与资源性能提示一键完成，适合竞品分析、SERP对比、客户站点初检、内容上线检查与落地页快检（数据为估算，仅供参考）。

🔎 Site Signal — Website Traffic & SEO Checker for Chrome Site Signal is a lightweight Chrome extension that gives you instant traffic, SEO, and domain insights for any website you visit — in one popup, without an account, without a paywall, and without slowing down your browser. Other SEO toolbars are bloated, locked behind subscriptions, or take 5 seconds to load. Site Signal is built for the moment when you just want a quick read on a site: how much traffic it gets, how strong its domain is, what it ranks for, and whether its on-page SEO is sane. Click the icon, get the answer, move on. 🚀 What Site Signal Shows You at a Glance • 📈 Estimated monthly website traffic and visit trends • 🥇 Domain Authority and Page Authority scores • 🔗 Backlinks count and top referring domains • 🔑 Top organic keywords and search volume • 🌎 Traffic by country and global rank • 🏷️ Meta tags: title, description, canonical, robots, hreflang • 📊 Core Web Vitals (LCP, CLS, INP) for the current page • 🕒 Domain age and registration details (WHOIS) • 🚦 Traffic sources breakdown: search, direct, social, referral • 📝 H1–H6 heading structure and word count • 🤖 Schema.org markup detection (article, product, FAQ, organization) • 🔁 Redirect chain inspector — see every hop a URL takes ✨ Why Choose Site Signal 🆓 Free Forever — no trial, no credit card, no premium tier hiding the data 🪶 Lightweight — Manifest V3, instant load, won't slow Chrome 🧩 No Account Required — install and start checking sites immediately 🔒 Privacy-First — Site Signal does not track which sites you browse; data is fetched only when you explicitly open the popup ⚡ One-Click Overview — every metric on one screen, no extra clicks 🎨 Clean, Distraction-Free UI — designed for SEOs and marketers, not for upselling 📤 CSV Export — export reports for any URL with one button 🌎 Works on Any Site — analyze any public website, no integration needed 🔍 How Site Signal Works 1. Click "Add to Chrome" to install Site Signal 2. Pin the magnifier icon to your toolbar 3. Visit any website you want to analyze 4. Click the Site Signal icon — the full report opens in a popup 5. Copy a metric, export to CSV, or jump to a deeper view as needed 📊 Built for the Real SEO Workflow Site Signal isn't trying to replace Ahrefs or Semrush — it's the tool you reach for between deep audits, when you need a 10-second answer: Quick competitor check You're researching a competitor and want to know how big they are. Open their site, click the icon, see traffic, domain authority, and top keywords — done in 5 seconds. Backlink prospecting You found a blog you might pitch a guest post to. One click tells you their DA, their topic relevance based on top keywords, and whether they're worth a pitch. Client site triage A new client says "my site isn't ranking." Open their homepage, see meta tags, headings, schema, and Core Web Vitals all at once. You'll spot the obvious issues before opening Search Console. SERP research Browse a Google search result, click on each top-10 result, and use Site Signal to compare DA, traffic, and meta-tag quality across the entire SERP. Domain due diligence Considering buying a domain? Site Signal shows registration date, traffic history, and link profile — instant gut check before deeper research. Content audit Open any page on your site and immediately see the title length, meta description, H1, word count, and schema markup. Catch on-page issues without opening Inspect Element. 🔑 Detailed SEO Metrics • On-Page: title, meta description, canonical URL, robots meta, viewport, language tag, hreflang alternates • Headings: full H1–H6 outline with word counts and duplicate-heading warnings • Links: internal vs external link counts, nofollow ratio, broken link warnings • Images: total images, missing alt text count, image-size warnings • Schema: detected JSON-LD types and quick-validate against Google guidelines • Performance: Core Web Vitals (LCP, CLS, INP), HTTPS, render-blocking resources • Indexability: robots.txt status, X-Robots-Tag, sitemap detection • Tech stack: CMS, framework, analytics, ad networks (Wappalyzer-style detection) 📈 Traffic and Authority Data Site Signal aggregates publicly available website data to estimate: • Monthly visits and 6-month trend • Global, country, and category rank • Traffic sources mix (search vs direct vs social vs referral) • Domain Authority score (0–100 scale) • Backlink count and unique referring domains • Top organic keywords driving traffic • Domain age, registrar, and WHOIS details All traffic and authority figures are estimates based on public data sources. They are useful for relative comparison and triage, not as ground truth for billing or contracts. 🔎 Who Site Signal Is For • SEO specialists running competitor research and audits • Content marketers vetting guest-post and link-building targets • Agencies onboarding new clients and triaging their websites • Bloggers checking domain quality before reaching out for collaborations • Webmasters running quick on-page audits of their own pages • Affiliates researching niche sites and SERP competition • Anyone who wants a fast, no-paywall website checker built into Chrome 🚫 What Site Signal Does NOT Do • It does not collect or transmit your browsing history — data is fetched only when you explicitly click the icon • It does not require an account, login, or credit card • It does not modify webpages, inject ads, or change search results • It does not provide automated link-building, auto-posting, or any rank manipulation • It does not replace deep SEO platforms (Ahrefs, Semrush) — it's a fast triage tool • It does not contain remote code; all logic ships in the extension package and updates only through Chrome Web Store version releases 🔐 Privacy & Trust • Site Signal does not track your browsing activity or build a profile of which sites you visit • On-page analysis runs only when you click the icon — never silently in the background • Data fetched from public APIs goes directly from your browser to those endpoints; we do not log your queries • No analytics SDKs, no telemetry, no advertising libraries inside the extension ⚠️ Important Disclaimer Site Signal is an independent SEO research tool and is not made by, affiliated with, endorsed by, or sponsored by Moz, Ahrefs, Semrush, Similarweb, Google, or any other SEO platform. Trademarks mentioned are the property of their respective owners and used only to describe industry-standard metrics that Site Signal reports. Traffic and authority figures shown are estimates derived from public data sources. They are intended for research, triage, and comparison — not as guaranteed or audited measurements. Always verify critical numbers against the source platforms (Google Analytics, Search Console, etc.) before making business decisions based on them. 🔎 Install Site Signal — your fast, free, lightweight website traffic and SEO checker for Chrome.