Aqicn.org - SEO Checker

Overview of the SEO Check
Meta information
98% 
Page quality
85% 
Page structure
70% 
Link structure
18% 
Server
95% 
External factors
100% 
SEO Score
Response time
2.10 s
File size
211.90 kB
Words
1439
Media files
48
Number of links
115 internal / 41 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Beijing Air Pollution: Real-time Air Quality Index
The length of the page title is perfect. (424 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Real-time air pollution index for 100+ countries
The length of the meta description is perfect. (289 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
An URL is specified multiple times in alternate links.
The href language hu is specified more than once in alternate links.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The character encoding is not specified in the HTTP header.
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype XHTML 1.0 Transitional is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
authorThe World Air Quality Index project
apple-mobile-web-app-status-bar-styleblack-translucent
viewportwidth=device-width
apple-mobile-web-app-capableyes
DescriptionReal-time air pollution index for 100+ countries
KeywordsBeijing PM2.5, Beijing AQI, Beijing Air Quality Index, Beijing Air Pollution Index, Beijing Air Pollution, Air Quality Index, Air Quality, Air Pollution, Pollution, China Air Pollution, Asia Air Pollution, World Air Pollution, Air quality historical data, Air Quality Rankings, Beijing AQI Windows widget, Beijing AQI android widget, PM10 respirable particulate matter, PM2.5 fine particulate matter, NO2 nitrogen dioxide, SO2 sulfur dioxide, CO carbon monoxide, O3 ozone,
msapplication-TileImagehttps://aqicn.org/images/iOS/ico_114.png
langen
twitter:cardsummary
twitter:site@world_aqi
twitter:imagehttps://aqicn.org/images/aqicn.fbworldmap-201911.png
twitter:descriptionHow polluted is the air today? Check out the real-time air pollution map, for more than 100 countries.
twitter:titleBeijing Air Pollution: Real-time Air Quality Index
fb:app_id643196515742584
og:localeen_US
og:typewebsite
og:site_nameaqicn.org
og:imagehttps://aqicn.org/images/aqicn.fbworldmap-201911.png
og:descriptionHow polluted is the air today? Check out the real-time air pollution map, for more than 100 countries.
og:titleBeijing Air Pollution: Real-time Air Quality Index
Content-Typetext/html; charset=UTF-8
DescriptionReal-time air pollution index for 100+ countries
KeywordsBeijing PM2.5, Beijing AQI, Beijing Air Quality Index, Beijing Air Pollution Index, Beijing Air Pollution, Air Quality Index, Air Quality, Air Pollution, Pollution, China Air Pollution, Asia Air Pollution, World Air Pollution, Air quality historical data, Air Quality Rankings, Beijing AQI Windows widget, Beijing AQI android widget, PM10 respirable particulate matter, PM2.5 fine particulate matter, NO2 nitrogen dioxide, SO2 sulfur dioxide, CO carbon monoxide, O3 ozone,

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Page quality

Content
(Critically important)
These Typos were found:
  • celcius => Celsius
There are 2 text duplicates on this page:
  • Duplicate: Active children and adults, and people with respiratory disease, such ...
This page contains 1439 words. That's ok.
27.1% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
27 paragraphs were found on this page.
No placeholders texts or images were found.
The average number of words per sentence of 18.59 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The following tag is repeated too often: beijing
Some tags are too long. With 90 characters this one is longer than 70 characters:
"www.windowsphone.com/en-us/store/app/asia-air-quality/f3828278-b7a9-4e5f-9936-95a2e9b2db18"
Image SEO
(Somewhat important)
8 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
https://aqicn.org/images/icons/p/locate.pngNo alt attribute provided
https://aqicn.org/images/icons/p/search.pngNo alt attribute provided
https://aqicn.org/images/icons/p/mapb2.pngNo alt attribute provided
data:[...] Base64No alt attribute provided
data:[...] Base64No alt attribute provided
data:[...] Base64Beijing PM25 (fine particulate matter) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.Beijing PM25 (fine particulate matter) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.
data:[...] Base64Beijing PM10 (respirable particulate matter) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.Beijing PM10 (respirable particulate matter) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.
data:[...] Base64Beijing O3 (ozone) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.Beijing O3 (ozone) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.
data:[...] Base64Beijing NO2 (nitrogen dioxide) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.Beijing NO2 (nitrogen dioxide) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.
data:[...] Base64Beijing SO2 (sulfur dioxide) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.Beijing SO2 (sulfur dioxide) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.
data:[...] Base64Beijing CO (carbon monoxide) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.Beijing CO (carbon monoxide) measured by Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心). Values are converted to the US EPA AQI standard.
data:[...] Base64Beijing t (temp.) measured by Citizen Weather Observer Program (CWOP/APRS).Beijing t (temp.) measured by Citizen Weather Observer Program (CWOP/APRS).
data:[...] Base64Beijing p (pressure:) measured by Citizen Weather Observer Program (CWOP/APRS).Beijing p (pressure:) measured by Citizen Weather Observer Program (CWOP/APRS).
data:[...] Base64Beijing h (humidity) measured by Citizen Weather Observer Program (CWOP/APRS).Beijing h (humidity) measured by Citizen Weather Observer Program (CWOP/APRS).
data:[...] Base64Beijing w (wind) measured by Citizen Weather Observer Program (CWOP/APRS).Beijing w (wind) measured by Citizen Weather Observer Program (CWOP/APRS).
...images/gaia-series-a12-icon-with-map.pngNo alt attribute provided
...atic/isprites/wgt-platforms/cloudapi.pngNo alt attribute provided
...mages/gaia-series-a12-large-with-map.pngNo alt attribute providedGAIA A12 Air Quality Monitoring Station
waqi.info/icons/logo.png?_=1731626205the World Air Quality Index project logo

Page structure

H1 heading
(Critically important)
Beijing Air Pollution: Real-time Air Quality Index (AQI)
Too many H1 headings
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Beijing Air Pollution: Real-time Air Quality Index (AQI)
H1 Looking for another city?
H1 Know any Air Quality station in your surroundings? Participate with your own air quality monitoring station
H1 Air quality historical data
H1 Air Quality Rankings
H1 Download the real-time Air Quality Index Widget for:
H1 Looking for more air quality related products?
H1 About the Air Quality and Pollution Measurement:
H2 Settings
H3 About This Project
H3 air quality research
H3 Frequently Asked Questions
H3 Credits
Anchor text is an URL
Some internal link anchor texts are too long.
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
12 links don't have an anchor text.
There are 2 links with a trivial anchor text.
The number of internal links is ok.
There are too many external links (41) on this page.
LinkAttributesAnchor text
https://aqicn.org/home/No Text
https://aqicn.org/city/beijing/No Text
/city/beijing/cn/No Text
/city/beijing/jp/No Text
/city/beijing/es/No Text
/city/beijing/kr/No Text
/city/beijing/ru/No Text
/city/beijing/hk/No Text
/city/beijing/fr/No Text
/city/beijing/pl/No Text
/city/beijing/de/No Text
/city/beijing/pt/No Text
/city/beijing/vn/No Text
/city/beijing/it/🇮🇹
/city/beijing/id/🇮🇩
/city/beijing/nl/🇳🇱
/city/beijing/fa/🇮🇷
/city/beijing/th/🇹🇭
/city/beijing/hu/🇭🇺
/city/beijing/el/🇬🇷
/city/beijing/ro/🇷🇴
/city/beijing/bg/🇧🇬
/city/beijing/ur/🇵🇰
/city/beijing/hi/🇮🇳
/city/beijing/ar/🇦🇪
/city/beijing/sr/🇷🇸
/city/beijing/bn/🇧🇩
/city/beijing/bs/🇧🇦
/city/beijing/hr/🇭🇷
/city/beijing/tr/🇹🇷
/city/beijing/uk/🇺🇦
/city/beijing/cs/🇨🇿
/city/beijing/be/🇧🇾
https://aqicn.org/city/beijing/English
/city/beijing/cn/Chinese - 简体中文
/city/beijing/jp/Japanese - 日本
/city/beijing/es/Spanish - español
/city/beijing/kr/Korean - 한국의
/city/beijing/ru/Russian - русский
/city/beijing/hk/Traditional Chinese - 繁體中文
/city/beijing/fr/French - Francais
/city/beijing/pl/Polish - Polski
/city/beijing/de/German - Deutsch
/city/beijing/pt/Portuguese - Português
/city/beijing/vn/Vietnamese - Tiếng Việt
/city/beijing/it/🇮🇹 Italian - Italiano
/city/beijing/id/🇮🇩 Indonesian - bahasa Indonesia
/city/beijing/nl/🇳🇱 Dutch - Nederlands
/city/beijing/fa/🇮🇷 Persian - فارسی
/city/beijing/th/🇹🇭 Thai - ภาษาไทย
/city/beijing/hu/🇭🇺 Hungarian - Magyar
/city/beijing/el/🇬🇷 Greek - Ελληνικά
/city/beijing/ro/🇷🇴 Romanian - Română
/city/beijing/bg/🇧🇬 Bulgarian - български
/city/beijing/ur/🇵🇰 Urdu - اردو
/city/beijing/hi/🇮🇳 Hindi - हिंदी
/city/beijing/ar/🇦🇪 Arabic - العربية
/city/beijing/sr/🇷🇸 Serbian - Српски
/city/beijing/bn/🇧🇩 Bangla - বাংলা
/city/beijing/bs/🇧🇦 Bosnian - босански
/city/beijing/hr/🇭🇷 Croatian - hrvatski
/city/beijing/tr/🇹🇷 Turkish - Türkçe
/city/beijing/uk/🇺🇦 Ukrainian - українська
/city/beijing/cs/🇨🇿 Czech - čeština
/city/beijing/be/🇧🇾 Belarusian - беларускі
https://aqicn.org/here/Trivial anchor text
Here
https://aqicn.org/map/world/map
https://aqicn.org/mask/mask
https://aqicn.org/faq/faq
https://aqicn.org/city/all/search
https://aqicn.org/contact/contact
https://aqicn.org/links/links
https://aqicn.org/city/beijing/Beijing AQI
A-TITLE Beijing (北京)
https://aqicn.org/city/beijing/m/A-TITLE view in full screen
/forecast/beijing/click to view the detailed forecast
http://www.bjmemc.com.cn/External Subdomain bjmemc.com.cn
https://aqicn.org/gaia/list/Learn more at > aqicn.org/gaia/ <
https://aqicn.org/here/URL anchor text
https://aqicn.org/here/
/data-platform/api/H1451/aqicn.org/data-platform/api/H1451
https://aqicn.org/api/aqicn.org/api/
/data-platform/api/H1451/Text duplicate aqicn.org/data-platform/api/H1451
https://aqicn.org/gaia/list/Click for more information
https://chrome.google.com/webs...External Subdomain URL anchor text
Click here to download the Beijing Air Quality plugin from the Chrome store. https://chrome.google.com/webstore/detail/world-air-quality-index/hhhfnanaabgcaf...
https://chrome.google.com/webs...External Subdomain IMG-ALT Chrome plugin
/gadget/chrome/?crxfrom this link
http://www.howtogeek.com/12074...External Subdomain howtogeek.com/120743/how-to-install-extensions-from-outside-the-chrome-web-store/
http://stackoverflow.com/quest...External stackoverflow.com/questions/9931906/crx-file-install-in-chrome
https://addons.mozilla.org/en-...External Subdomain URL anchor text
Click here to download the Beijing Air Quality plugin from the Firefox store. https://addons.mozilla.org/en-US/firefox/addon/aqicn/
https://addons.mozilla.org/en-...External Subdomain Text duplicate IMG-ALT Chrome plugin
/gadget/firefox/?xpiText duplicate from this link
http://ios.aqicn.org/?1451External Subdomain URL anchor text
http://ios.aqicn.org/?1451
http://www.windowsphone.com/en...External Subdomain www.windowsphone.com/en-us/store/app/asia-air-quality/f3828278-b7a9-4e5f-9936-95a2e9b2db18
/gadget/winmo/?xapURL anchor text
https://aqicn.org/gadget/winmo/?xap
/widgets/symbian/beijing/Download " BeijingAir.wgz"
/widgets/winpc/beijing/Download "Beijing.gadget"
https://play.google.com/store/...External Subdomain the google app store.
https://play.google.com/store/...External Subdomain Google商店
https://aqicn.org/?apkapk file
https://aqicn.org/?apkAPK文件
https://aqicn.org/products/Home Air Purifiers
https://aqicn.org/mask/Protection Masks & Respirators
https://aqicn.org/products/Text duplicate Home Air Purifiers
https://aqicn.org/products/Personal Air Quality Monitors
https://aqicn.org/sensor/DIY Air Sensors
/products/monitoring-stations/Professional Air Quality Monitoring Stations
http://en.wikipedia.org/wiki/A...External Subdomain wikipedia Air Quality topic
http://www.airnow.gov/index.cf...External Subdomain airnow guide to Air Quality and Your Health
http://www.myhealthbeijing.com/External Subdomain www.myhealthbeijing.com
https://aqicn.org/here/Text duplicate Trivial anchor text
Here
https://aqicn.org/map/world/Text duplicate map
https://aqicn.org/mask/Text duplicate mask
https://aqicn.org/faq/Text duplicate faq
https://aqicn.org/city/all/Text duplicate search
https://aqicn.org/contact/Text duplicate contact
https://aqicn.org/links/Text duplicate links
https://aqicn.org/contact/Contact The World Air Quality Index Project Team
https://aqicn.org/media/Press And Media Kit
https://aqicn.org/research/air quality research
https://aqicn.org/faq/Air Quality Knowledge Base And Articles
https://aqicn.org/research/Air Quality Experimentation
https://aqicn.org/sensor/Air Quality Sensors Analysis
https://aqicn.org/faq/Frequently Asked Questions
https://aqicn.org/sources/Air Quality Data source
/faq/2015-03-15/air-quality-no...Air Quality Index Calculation
https://aqicn.org/forecast/Air Quality Forecasting
https://aqicn.org/products/Air Quality Products (masks, Monitors...)
https://aqicn.org/api/API (Application Programming Interface)
https://aqicn.org/data-platform/Historical Data Platform
https://aqicn.org/sources/All the EPA in the world for their excellent work in maintaining, measuring and providing Air Quality information to the world citizens
http://www.maxmind.com/External Subdomain This product includes GeoLite2 data created by MaxMind, available from maxmind.com.
http://geonames.org/External This product includes GeoNames city information, available from geonames.org.
http://openweathermap.org/External Open Weather Map, combined with qweather™ improvement algorithm
http://wxqa.com/External Citizen Weather Observer Program
https://cwop.waqi.info/External Subdomain cwop.waqi.info
http://atmosphere.copernicus.eu/External Subdomain Contains modified Copernicus Atmosphere Monitoring Service Information
https://www.flaticon.com/External Subdomain Some of the icons made by Freepik from www.flaticon.com
A-TITLE Flaticon
https://locationiq.com/External Reverse geocoding by locationiq.com
A-TITLE location IQ
https://www.openstreetmap.org/...External Subdomain Base map and data from OpenStreetMap.
A-TITLE Open Street Map
https://waqi.info/External The World Air Quality Index Project
http://wxqa.com/External Citizen Weather Observer Program (CWOP/APRS)
http://www.bjmemc.com.cn/External Subdomain Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心)
https://sthj.sh.gov.cn/External Subdomain Shanghai Environment Monitoring Center(上海市环境监测中心)
http://106.37.208.233:20035/em...External Subdomain China National Urban air quality real-time publishing platform (全国城市空气质量实时发布平台)
https://china.usembassy-china....External Subdomain U.S. Consulate Shanghai Air Quality Monitor
http://sthjj.gz.gov.cn/External Subdomain Guangzhou Environmental Protection Bureau (广州市生态环境局)
https://china.usembassy-china....External Subdomain U.S. Consulate Guangzhou Air Quality Monitor
https://sthjt.sc.gov.cn/External Subdomain Sichuan Province Environmental Protection Agency (四川省环保重点城市环境空气质量实时监测结果)
http://sthj.chengdu.gov.cn/External Subdomain Chengdu Environmental Protection Agency (成都市环境监测中心站_成都市环境监测中心站)
https://china.usembassy-china....External Subdomain U.S. Consulate Chengdu Air Quality Monitor
http://hbt.jiangsu.gov.cn/External Subdomain Jiangsu Environmental Protection public network (江苏省城市空气PM2.5等试运行监测数据平台)
http://222.190.111.117:8023/External Subdomain Nanjing Air Quality Distribution System (南京空气质量发布系统)
http://meeb.sz.gov.cn/External Subdomain Shenzhen Environment Network (深圳人居环境网)
http://gdee.gd.gov.cn/External Subdomain Guangdong Environmental Protection public network (广东环境保护公众网)
http://www.szhec.gov.cn/External Subdomain Text duplicate Shenzhen Environment Network (深圳人居环境网)
http://113.108.142.147:20035/e...External Subdomain Text duplicate China National Urban air quality real-time publishing platform (全国城市空气质量实时发布平台)
http://www.tjemc.org.cn/External Subdomain Tianjin Environmental Monitoring Center (天津市环境监测中心)

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://aqicn.org/city/beijing/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is very slow (2.10 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
The file size of the HTML document is fine (212 kB).

HTTP Response Header

NameValue
servernginx
dateThu, 14 Nov 2024 23:43:03 GMT
content-typetext/html
last-modifiedThu, 14 Nov 2024 23:16:45 GMT
etagW/"673684dd-34f98"
strict-transport-securitymax-age=3600
x-serverjp2n
content-encodinggzip
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 180 referring domains.
This page has 252 backlinks.
This page has backlinks from 137 different ip addresses.

Search preview

aqicn.org › city › beijing
Beijing Air Pollution: Real-time Air Quality Index
Real-time air pollution index for 100+ countries

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Air83%Check
Real-time Air80%Check
real-time air pollution80%Check
Real-time79%Check
Air Pollution79%Check
Index78%Check
Pollution77%Check
Beijing Air77%Check
Beijing Air Pollution77%Check
Beijing76%Check

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