SEO report for cppreference.cn
https://cppreference.cn/ · checked Wed, 04 Nov 2026 17:07 GMT
Fix these first
- Mobile viewportcritical
viewport: width=1120
Fix: Use <meta name="viewport" content="width=device-width, initial-scale=1"> and allow zoom.
- Canonical URLhigh
No canonical tag.
Fix: Add <link rel="canonical" href="(this page's full URL)"> – only point it elsewhere for true duplicates.
- Meta descriptionhigh
No meta description – Google will pick text from the page.
Fix: Write a 140–155 character description that answers the searcher's question and invites the click.
- Topic focushigh
0 of 1 title keywords appear in the main content (missing: 参考手册).
Fix: Use your main title phrases naturally in the opening paragraph and headings.
- Entity clarityhigh
No Organization / LocalBusiness structured data – search engines and AI have to guess who runs this site.
Fix: Add Organization or LocalBusiness JSON-LD with name, url, logo, contact details and sameAs links to your official profiles.
- JSON-LD present & validhigh
No JSON-LD structured data.
Fix: Add JSON-LD describing the business and the page (Organization/LocalBusiness, WebSite, WebPage or Article, BreadcrumbList).
- HTTP → HTTPS redirecthigh
http:// does not redirect to https://.
Fix: 301-redirect all http:// requests to https://.
- Title tagcritical
“cppreference.cn - C++参考手册”
Fix: Write a unique title of roughly 50–60 characters with the main search phrase first.
Real-world speed Google PageSpeed
Loading Core Web Vitals from Google… this can take up to 30 seconds.
Authority & backlinks
Looking up which websites link to cppreference.cn…
Indexing & crawling 81%
Can search engines reach, read and index this page?
- ✓
Status codecritical
The page returned HTTP 200.
- ✓
Indexablecritical
No noindex instruction – the page can appear in search.
- ✓
robots.txthigh
robots.txt found.
Googlebot is allowed to crawl this page.
- !
XML sitemaphigh
Sitemap found at https://cppreference.cn/sitemap.xml with 7,091 URLs.
Not declared in robots.txt.
This page is listed in it.
Most recent lastmod: 2026-10-31.
Fix: Add a 'Sitemap:' line to robots.txt, list every indexable page and include accurate lastmod dates.
- ✗
Canonical URLhigh
No canonical tag.
Fix: Add <link rel="canonical" href="(this page's full URL)"> – only point it elsewhere for true duplicates.
- ✓
Redirectshigh
Loads directly with no redirects.
- ✓
www / non-wwwmedium
www.cppreference.cn redirects to cppreference.cn.
Search snippet & sharing 29%
How the page looks in Google results and when shared.
- !
Title tagcritical
“cppreference.cn - C++参考手册”
About 243px of Google's ~580px desktop width – short; use the space.
Fix: Write a unique title of roughly 50–60 characters with the main search phrase first.
- ✗
Meta descriptionhigh
No meta description – Google will pick text from the page.
Fix: Write a 140–155 character description that answers the searcher's question and invites the click.
- ✗
Faviconlow
No favicon linked.
Fix: Add a square favicon at least 48×48px.
- ✓
Languagelow
lang="zh-hans"
Content quality 46%
Is there enough clear, useful text that matches what the page targets?
- ✓
Word countmedium
436 words of main content (menus and footer excluded).
Google has no minimum word count – this is a rough guide to whether the page answers the question in full.
- i
Readabilitymedium
Reading-ease scores only work for English; this page is lang="zh-hans".
- ✗
Topic focushigh
0 of 1 title keywords appear in the main content (missing: 参考手册).
Fix: Use your main title phrases naturally in the opening paragraph and headings.
- !
H1 headingcritical
“C 和 C++ 参考”
The H1 shares no keywords with the title.
Fix: Use one H1 that states the page topic with its main keyword.
- !
Heading structuremedium
9 headings for 436 words.
1 skipped level(s), e.g. H2 → H4.
Fix: Use H2s for main sections and H3s inside them, without skipping levels.
- !
Text-to-code ratiolow
6% of the HTML is visible text.
Fix: Trim unused markup, inline scripts and builder bloat.
AI search readiness 38%
Can ChatGPT, Claude, Perplexity and Google AI Overviews read, understand and cite this site?
- ✓
AI crawler accesshigh
Search and AI-search crawlers (Googlebot, Bingbot, OAI-SearchBot, Claude-SearchBot, PerplexityBot…) can read this page.
- ✓
Snippet controlshigh
No snippet restrictions – search and AI answers can quote this page.
- ✗
llms.txtlow
No /llms.txt file. It's an optional, emerging convention – few AI tools are confirmed to read it yet, so this is low priority.
Fix: Optionally add /llms.txt: a short Markdown summary of who you are with links to your key pages.
- ✗
Question-led contentmedium
No headings phrased as questions.
Fix: Add headings that match real questions ("How much does…?") followed by a direct one- or two-sentence answer – an easy format for search and AI answers to quote.
- ✗
Entity clarityhigh
No Organization / LocalBusiness structured data – search engines and AI have to guess who runs this site.
Fix: Add Organization or LocalBusiness JSON-LD with name, url, logo, contact details and sameAs links to your official profiles.
- ✗
Freshness signalsmedium
No published/updated date found.
Fix: Show a 'last updated' date and add dateModified to your structured data.
- ✗
Trust pages (E-E-A-T)medium
No links found to about, contact or privacy pages.
Fix: Link to About, Contact and Privacy pages from every page – they help visitors, Google and AI tools see who stands behind the content.
Structured data 0%
Machine-readable facts for rich results and AI.
- ✗
JSON-LD present & validhigh
No JSON-LD structured data.
Fix: Add JSON-LD describing the business and the page (Organization/LocalBusiness, WebSite, WebPage or Article, BreadcrumbList).
Links 67%
Internal linking, anchor text and broken links.
- !
Internal linkinghigh
280 internal and 1 external links.
Fix: Link to your most important pages from this page with descriptive text.
- !
Anchor text qualitymedium
Same text used for different pages: “c++11”, “c++14”, “c++17”, “c++20”.
Fix: Make every link text describe its destination, e.g. “logo design prices” instead of “click here”.
- ✓
Broken links (sample)high
Checked 12 internal link(s).
No broken links found.
- !
Internal nofollowlow
1 internal link(s) are nofollow, so search engines may not follow them.
Fix: Remove rel="nofollow" from links to your own pages.
Performance 94%
Speed signals from the HTML and server. Real-user Core Web Vitals load below.
- ✓
Server response (TTFB)high
685 ms until the first response from our checker, including connection setup (Google rates TTFB good under 0.8 s, poor over 1.8 s).
- ✓
HTML sizemedium
48 kB of HTML.
- ✓
Compressionmedium
Compressed with br.
- ✓
Render-blocking resourceshigh
0 blocking script(s) and 2 stylesheet(s) in <head>.
- !
Scripts & third partiesmedium
12 script tag(s); files loaded from 2 other domain(s): pagead2.googlesyndication.com, cdn.jsdelivr.net.cn.
Fix: Remove unused tracking and widget scripts; every third party adds connection time.
- ✓
Imagesmedium
No <img> tags.
- ✓
Cachinglow
Cache-Control: max-age=86400, public
- ✓
HTTP/3low
Server advertises HTTP/3 (faster on mobile networks).
Security 58%
Visitor safety signals that browsers and Google check.
- ✓
HTTPScritical
Secure HTTPS with no mixed content.
- ✗
HTTP → HTTPS redirecthigh
http:// does not redirect to https://.
Fix: 301-redirect all http:// requests to https://.
- ✗
HSTSmedium
No Strict-Transport-Security header.
Fix: Add Strict-Transport-Security: max-age=63072000; includeSubDomains.
- ✓
Security headerslow
Present: CSP, nosniff, Referrer-Policy, clickjacking protection.
- ✓
Server fingerprintlow
No X-Powered-By header (server: cloudflare).
Mobile & accessibility 42%
Usable on phones and by everyone – Google indexes the mobile version.
- ✗
Mobile viewportcritical
viewport: width=1120
Fix: Use <meta name="viewport" content="width=device-width, initial-scale=1"> and allow zoom.
- ✓
Image alt textmedium
No images.
- ✓
Form labelsmedium
All 1 form fields are labelled.
- ✓
Link nameslow
Every link has a readable name.
- ✗
Tap-to-contactmedium
No tel: or mailto: links.
Fix: Add a tap-to-call or tap-to-email button so phone visitors can contact you instantly.
Local SEO not scored
This site doesn't look like a local business, so these checks are shown for information and not scored.
- i
LocalBusiness markuphigh
No LocalBusiness structured data.
- i
Contact details on pagemedium
No phone number found.
No postcode found (fine for service-area businesses).
- i
Map & directionslow
No map or directions link.