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Report generated 5 months ago
https://hanoi.codegym.vn
Your general SEO Checkup Score
Archived
65/100
SEO Score
18 Failed
3 Warnings
49 Passed
Issues to fix
Last found on Invalid Date
HIGH
The CLS score of this webpage is 0.278. To provide a good user experience, sites should strive to have a CLS score of 0.1 or less.
HIGH
The Largest Contentful Paint duration of this webpage is 8.33 seconds. To provide a good user experience, sites should strive to have Largest Contentful Paint of 2.5 seconds or less.
HIGH
Your webpage contains URLs that are not SEO friendly!
HIGH
This webpage is using mixed content! While the initial HTML is loaded over a secure HTTPS connection, other resources (such as images, videos, stylesheets, scripts) may be loaded over an insecure HTTP connection, which may result in blocked content or unexpected page behavior.
HIGH
https://hanoi.codegym.vn and https://www.hanoi.codegym.vn should resolve to the same URL, but currently do not.
HIGH
This webpage is using render blocking resources! Eliminating render-blocking resources can help your page load significantly faster and improve the website experience for your visitors.
HIGH
This webpage is not serving images in a modern format. Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
HIGH
Your website loading time is around 9.52 seconds and is over the average loading speed which is 5 seconds.
HIGH
The size of your webpage's HTML is 49.09 Kb, and is greater than the average size of 33 Kb. This can lead to slower loading times, lost visitors, and decreased revenue. Good steps to reduce HTML size include: using HTML compression, CSS layouts, external style sheets, and moving javascript to external files.
MEDIUM
Your webpage is using "img" tags with empty or missing "alt" attribute.
MEDIUM
This webpage is using target="_blank" links without rel="noopener" or rel="noreferrer" attribute, which can expose it to performance and security issues.
MEDIUM
The JavaScript code used by this webpage is executed in more than 3.5 seconds. When the JavaScript code takes a long time to execute, it slows down the page performance in several ways: longer download times, main thread bottlenecks, delays of "Time To Interactive", memory leaks, etc.
MEDIUM
The Document Object Model (DOM) of this webpage has 5,985 nodes which is greater than the recommended value of 1,500 nodes. A large DOM size negatively affects site performance and increases the page load time.
MEDIUM
Not all images in this page are properly sized! You are serving images that are larger than needed for the size of the user's viewport.
LOW
Your DNS server is not using an SPF record. SPF (Sender Policy Framework) allows administrators to specify which hosts are allowed to send mail from a given domain by creating a specific SPF record or TXT record in the Domain Name System (DNS). You can find more information about SPF records here.
LOW
Your webpage doesn't take the advantages of HTML Microdata specifications in order to markup structured data. View Google's guide for getting started with microdata.
LOW
Your webpage is using inline CSS styles!
Common SEO issues
Score: 73
Failed: 4
Warnings: 2
Passed: 20
Meta Title Test100% of top 100 sites passed
  • Congratulations! Your webpage is using a title tag
Text: CodeGym Hà Nội - Học lập trình hiện đại tại Hà Nội | Coding Bootcamp
Meta Description Test97% of top 100 sites passed
  • Congratulations! Your webpage is using a meta description tag
Text: Đào tạo lập trình hiện đại tại Hà Nội, coding bootcamp, cam kết việc làm cho đối tượng từ con số 0, sinh viên, người đi làm muốn chuyển nghề.
Google Search Results Preview Test
Desktop version
https://hanoi.codegym.vnCodeGym Hà Nội - Học lập trình hiện đại tại Hà Nội | Coding BootcampĐào tạo lập trình hiện đại tại Hà Nội, coding bootcamp, cam kết việc làm cho đối tượng từ con số 0, sinh viên, người đi làm muốn chuyển nghề.
Mobile version
https://hanoi.codegym.vnCodeGym Hà Nội - Học lập trình hiện đại tại Hà Nội | Coding BootcampĐào tạo lập trình hiện đại tại Hà Nội, coding bootcamp, cam kết việc làm cho đối tượng từ con số 0, sinh viên, người đi làm muốn chuyển nghề.
Social Media Meta Tags Test83% of top 100 sites passed
  • This webpage is using social media meta tags.
Open Graph Meta Tags
og:locale
en_US
og:type
website
og:title
CodeGym Hà Nội - Học lập trình hiện đại tại Hà Nội | Coding Bootcamp
og:description
Đào tạo lập trình hiện đại tại Hà Nội, coding bootcamp, cam kết việc làm cho đối tượng từ con số 0, sinh viên, người đi làm muốn chuyển nghề.
og:url
https://hanoi.codegym.vn/
og:site_name
CodeGym Hà Nội
Most Common Keywords Test
  • There is likely no optimal keyword density (search engine algorithms have evolved beyond keyword density metrics as a significant ranking factor). It can be useful, however, to note which keywords appear most often on your page and if they reflect the intended topic of your page. More importantly, the keywords on your page should appear within natural sounding and grammatically correct copy.
81codegym50trình39viên34nghiệp32được
Keywords Usage Test81% of top 100 sites passed
  • Congratulations! You are using your keywords in your meta-tags, which help search engines to properly identify the topic of your page.
Keyword(s) included in Title tag
Keyword(s) included in Meta-Description tag
Keywords Cloud Test
biếtbiệtbootcampchiềuchuyênchuyểnchuẩnchúngchươngchọnchứccodecodegymcodingcôngcùngcộngdehadoanhdàngdụnggiáogiảigiảnggiớigiữahiểuhiệnhiệuhoànhuấnhànhhìnhhướngjavajavascriptkhaikháckhóakhôngkhởikiệnliênluyệnmìnhmệnhngaynghiênghiệpnghềnghệngànhngàyngườinhânnhấtnhữngnăngphápphátphươngphầnquanquyếtreadsuốtsángtesterthanhtheothiệuthuậnthànhthángthêmthôngthườngthỏathốngthờithứcthựctiêutiếntriểntrongtrìnhtuyểntảngviênviệcviệtvữngxuânđangđìnhđăngđượcđịnhđồng
Competitor Domains Test
Understand your competitors' SEO profile

Side-by-side SEO comparisons of up to 5 competitors. See how your SEO can improve against the competition.

Heading Tags Test70% of top 100 sites passed
  • Your page contains too many H2 tags. H2 tags should re-inforce the related content of your page to search engines - too many tags may make the topic less clear, or look like spam tactics. Consider using less than 10 H2 tags.
H1 tags
CodeGym Hà Nội - Đào tạo lập trình hiện đại
CodeGym Hà Nội
H2 tags
HỆ THỐNG ĐÀO TẠO LẬP TRÌNH HIỆN ĐẠI
GIỚI THIỆU VỀ CODEGYM HÀ NỘI
KHÓA HỌC CODING BOOTCAMP CỦA CHÚNG TÔI
VÌ SAO NÊN CHỌN CODEGYM HÀ NỘI?
DOANH NGHIỆP NÓI VỀ CODEGYM
HỌC VIÊN NÓI VỀ CODEGYM
SẢN PHẨM CỦA HỌC VIÊN CODEGYM HÀ NỘI
ĐỐI TÁC TUYỂN DỤNG
TIN TỨC SỰ KIỆN
DEHA – CodeGym: Thỏa thuận hợp tác tuyển dụng Tester
Hé lộ nhân tố Leaderboard tháng 5/2022 tại 2 cơ sở của CodeGym Hà Nội
[CodeGym Hà Nội] Techtalk: “Chuyển nghề Tester – Bắt đầu từ con số 0”
27 Học viên CodeGym Hà Nội tham gia buổi phỏng vấn tuyển dụng và tìm việc làm tại “Interview Day”
Hiểu rõ về văn hóa doanh nghiệp qua Workshop: “Văn hóa doanh nghiệp”
[CodeGym Hà Nội] Khai giảng thành công khóa đào tạo lập trình chuyên nghiệp tháng 5 cho 2 lớp học Java và JavaScript
CÂU HỎI THƯỜNG GẶP
Robots.txt Test94% of top 100 sites passed
  • Congratulations! Your site uses a "robots.txt" file.
Sitemap Test75% of top 100 sites passed
  • Congratulations! Your website has a sitemap file.
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SEO Friendly URL Test40% of top 100 sites passed
  • Your webpage contains URLs that are not SEO friendly!
See results list
Image Alt Test71% of top 100 sites passed
  • Your webpage is using "img" tags with empty or missing "alt" attribute.
See full list
Responsive Image Test38% of top 100 sites passed
  • Not all images in this page are properly sized! You are serving images that are larger than needed for the size of the user's viewport.
See results list
Image Aspect Ratio Test72% of top 100 sites passed
  • All image display dimensions match the natural aspect ratio.
Inline CSS Test2% of top 100 sites passed
  • Your webpage is using inline CSS styles!
See results list
Deprecated HTML Tags Test99% of top 100 sites passed
  • Congratulations! Your page does not use HTML deprecated tags.
Google Analytics Test69% of top 100 sites passed
  • Congratulations! Your webpage is using Google Analytics.
Favicon Test100% of top 100 sites passed
  • favicon
    Congratulations! Your website appears to have a favicon.
JS Error Test74% of top 100 sites passed
  • Congratulations! There are no severe JavaScript errors on your webpage.
Console Errors Test33% of top 100 sites passed
  • This webpage has some warnings caught by the Chrome DevTools Console!
See results list
Charset Declaration Test100% of top 100 sites passed
  • This webpage has a character encoding declaration.
Content-Type: text/html; charset=UTF-8
Social Media Test80% of top 100 sites passed
  • Congratulations! Your website is connected successfully with social media using:
Facebook 
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Speed optimizations
Score: 55
Failed: 9
Warnings: 0
Passed: 13
HTML Page Size Test34% of top 100 sites passed
DOM Size Test17% of top 100 sites passed
  • The Document Object Model (DOM) of this webpage has 5,985 nodes which is greater than the recommended value of 1,500 nodes. A large DOM size negatively affects site performance and increases the page load time.
HTML Compression/GZIP Test96% of top 100 sites passed
  • Congratulations! Your webpage is successfully compressed using br compression on your code. Your HTML is compressed from 350.3 Kb to 49.09 Kb (86% size savings). This helps ensure a faster loading webpage and improved user experience.
Site Loading Speed Test
  • Your website loading time is around 9.52 seconds and is over the average loading speed which is 5 seconds.
Accurate loading speed and website loading speed monitor

Get detailed and accurate loading speed reports for your websites and see how your pages are being loaded over time.

Register for free and use the Loading Speed Monitor from SEO Site Checkup Toolbox today and get valuable insights on how much time your customers need to wait until they see your page.

JS Execution Time Test79% of top 100 sites passed
  • The JavaScript code used by this webpage is executed in more than 3.5 seconds. When the JavaScript code takes a long time to execute, it slows down the page performance in several ways: longer download times, main thread bottlenecks, delays of "Time To Interactive", memory leaks, etc.
Page Objects Test
  • Your page uses more than 20 http requests, which can slow down page loading and negatively impact user experience.
Content size by content type
Content type
Percent
Size
javascript
49.9 %
2.31 Mb
image
26.3 %
1.22 Mb
font
11.4 %
540.81 Kb
html
5.3 %
250.88 Kb
other
5.0 %
236.02 Kb
css
2.1 %
101.71 Kb
TOTAL
100%
4.63 Mb
Requests by content type
Content type
Percent
Requests
other
28.3 %
36
javascript
26.0 %
33
css
12.6 %
16
image
12.6 %
16
font
11.0 %
14
html
9.4 %
12
TOTAL
100%
127
Content size by domain
Domain
Percent
Size
youtube.com
49.7 %
2.30 Mb
hanoi.codegym.vn
27.9 %
1.29 Mb
fonts.gstatic.com
10.6 %
503.18 Kb
jnn-pa.googleapis.com
4.9 %
234.48 Kb
c0.wp.com
2.1 %
98.14 Kb
i.ytimg.com
1.9 %
92.35 Kb
i0.wp.com
1.7 %
80.81 Kb
googletagmanager.com
0.7 %
32.79 Kb
google.com
0.3 %
14.19 Kb
stats.wp.com
0.1 %
3.10 Kb
Other
0.2 %
7.35 Kb
TOTAL
100%
4.63 Mb
Requests by domain
Domain
Percent
Requests
hanoi.codegym.vn
33.1 %
42
youtube.com
22.8 %
29
fonts.gstatic.com
10.2 %
13
jnn-pa.googleapis.com
10.2 %
13
c0.wp.com
8.7 %
11
googleads.g.doubleclick.net
6.3 %
8
i.ytimg.com
2.4 %
3
stats.wp.com
0.8 %
1
static.doubleclick.net
0.8 %
1
google.com
0.8 %
1
Other
3.9 %
5
TOTAL
100%
127
Page Cache Test (Server Side Caching)100% of top 100 sites passed
  • Congratulations, you have a caching mechanism on your website. Caching helps speed page loading times as well as reduces server load.
Flash Test100% of top 100 sites passed
  • Congratulations! Your website does not include flash objects (an outdated technology that was sometimes used to deliver rich multimedia content). Flash content does not work well on mobile devices, and is difficult for crawlers to interpret.
CDN Usage Test96% of top 100 sites passed
  • Your webpage is serving all images, javascript and css resources from CDNs.
See results list
Modern Image Format Test32% of top 100 sites passed
  • This webpage is not serving images in a modern format. Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
See results list
Image Caching Test99% of top 100 sites passed
  • Congratulations! Your website is using cache headers for your images and the browsers will display these images from the cache.
JavaScript Caching Test98% of top 100 sites passed
  • Congratulations! Your website is using cache headers for all JavaScript resources.
CSS Caching Test98% of top 100 sites passed
  • Congratulations! Your website is using cache headers for all CSS resources.
JavaScript Minification Test93% of top 100 sites passed
  • Congratulations! Your website's JavaScript files are minified!
See results list
CSS Minification Test97% of top 100 sites passed
  • Congratulations! Your webpage's CSS resources are minified.
See results list
Render Blocking Resources Test29% of top 100 sites passed
  • This webpage is using render blocking resources! Eliminating render-blocking resources can help your page load significantly faster and improve the website experience for your visitors.
See results list
Nested Tables Test99% of top 100 sites passed
  • Congratulations, your page does not use nested tables. This speeds up page loading time and optimizes the user experience.
Frameset Test100% of top 100 sites passed
  • Congratulations! Your webpage does not use frames.
Doctype Test100% of top 100 sites passed
  • Congratulations! Your website has a doctype declaration:
<!DOCTYPE html>
URL Redirects Test96% of top 100 sites passed
  • Congratulations! Your URL doesn't have any redirects (which could potentially cause site indexation issues and site loading delays).
Largest Contentful Paint Test
  • The Largest Contentful Paint duration of this webpage is 8.33 seconds. To provide a good user experience, sites should strive to have Largest Contentful Paint of 2.5 seconds or less.
Largest Contentful Paint element within the viewport:
Text: CodeGym Hà Nội - Đào tạo lập trình hiện đại CodeGym cùng bạn khởi đầu sự nghiệp...
Html: <div class="et_pb_slide et_pb_slide_0 et_clickable et_pb_bg_la..." data-slide-id="et_pb_slide_0">
Cumulative Layout Shift Test
  • The CLS score of this webpage is 0.278. To provide a good user experience, sites should strive to have a CLS score of 0.1 or less.
DOM element which contributes the most to CLS score:
Text: 7 TRUNG TÂM 6 THÀNH PHỐ HỌC VIÊN
Html: <div class="et_pb_section et_pb_section_3 et_pb_with_backgroun...">
Score: 0.262
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Analyze SEO metrics & get important information about your competition.
Server and security
Score: 63
Failed: 3
Warnings: 0
Passed: 6
URL Canonicalization Test92% of top 100 sites passed
SSL Checker and HTTPS Test100% of top 100 sites passed
  • Your website is successfully using HTTPS, a secure communication protocol over the Internet.

The certificate is not used before the activation date.

The certificate has not expired.

The hostname "hanoi.codegym.vn" is correctly listed in the certificate.

The certificate should be trusted by all major web browsers.

The certificate was not revoked.

The certificate was signed with a secure hash.

Certificate Chain:
Server certificate
Common name
sni.cloudflaressl.com
Organization
Cloudflare, Inc.
Location
San Francisco, California, US
Subject Alternative Names (SANs)
codegym.vn, sni.cloudflaressl.com, *.codegym.vn
Not valid before
Not valid after
Signature algorithm
ecdsaWithSha256
Issuer
Cloudflare Inc ECC CA-3
Intermediate certificate
Common name
Cloudflare Inc ECC CA-3
Organization
Cloudflare, Inc.
Location
US
Not valid before
Not valid after
Signature algorithm
sha256WithRsaEncryption
Issuer
Baltimore CyberTrust Root
Root certificate
Common name
Baltimore CyberTrust Root
Organization
Baltimore
Location
IE
Not valid before
Not valid after
Signature algorithm
sha1WithRsaEncryption
Issuer
Baltimore CyberTrust Root
Mixed Content Test (HTTP over HTTPS)100% of top 100 sites passed
  • This webpage is using mixed content! While the initial HTML is loaded over a secure HTTPS connection, other resources (such as images, videos, stylesheets, scripts) may be loaded over an insecure HTTP connection, which may result in blocked content or unexpected page behavior.
See results list
HTTP2 Test92% of top 100 sites passed
  • This webpage is using the HTTP/2 protocol.
Safe Browsing Test100% of top 100 sites passed
  • This site is not currently listed as suspicious (no malware or phishing activity found).
Server Signature Test88% of top 100 sites passed
  • Congratulations, your server signature is off.
Directory Browsing Test100% of top 100 sites passed
  • Congratulations! Your server has disabled directory browsing.
Plaintext Emails Test93% of top 100 sites passed
  • Congratulations! Your webpage does not include email addresses in plaintext.
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Mobile usability
Score: 100
Failed: 0
Warnings: 0
Passed: 3
Meta Viewport Test94% of top 100 sites passed
  • This webpage is using a viewport meta tag.
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" />
Media Query Responsive Test99% of top 100 sites passed
  • Congratulations, your website uses media query technique, which is the base for responsive design functionalities.
Mobile Snapshot Test
Mobile view
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Advanced SEO
Score: 80
Failed: 2
Warnings: 1
Passed: 7
Structured Data Test59% of top 100 sites passed
  • Your webpage doesn't take the advantages of HTML Microdata specifications in order to markup structured data. View Google's guide for getting started with microdata.
Custom 404 Error Page Test75% of top 100 sites passed
  • Congratulations, your website is using a custom 404 error page. By creating a custom 404 error page, you can improve your website's user experience by letting users know that only a specific page is missing/broken (and not your entire site), providing them helpful links, the opportunity to report bugs, and potentially track the source of broken links in your site.
Noindex Tag Test99% of top 100 sites passed
  • Your webpage does not use the noindex meta tag. This means that your webpage will be read and indexed by search engines.
Canonical Tag Test95% of top 100 sites passed
  • Your webpage is using the canonical link tag. This tag specifies that the URL: https://hanoi.codegym.vn is preferred to be used in search results. Please ensure that this specification is correct, as canonical tags are often hard-coded and may not always reflect the latest changes in a site's URL structure.
<link href="https://hanoi.codegym.vn/" rel="canonical"/>
Nofollow Tag Test
  • Your webpage does not use the nofollow meta tag. This means that search engines will crawl all links from your webpage.
Disallow Directive Test
  • Your robots.txt file disallow the search engines access to some parts of your website. You are advised to check carefully if the access to these resources or pages must be blocked.
See results list
Meta Refresh Test95% of top 100 sites passed
  • Congratulations, this webpage is not using a meta refresh tag.
SPF Records Test94% of top 100 sites passed
  • Your DNS server is not using an SPF record. SPF (Sender Policy Framework) allows administrators to specify which hosts are allowed to send mail from a given domain by creating a specific SPF record or TXT record in the Domain Name System (DNS). You can find more information about SPF records here.
Ads.txt Validation Test80% of top 100 sites passed
  • This website doesn't use an ads.txt file! Ads.txt is a text file that contains a list of Authorized Digital Sellers. The purpose of ads.txt files is to give advertisers and advertising networks the ability to verify who is allowed to sell advertising on your website.
Spell Check Test
Check your webpage for misspellings!

Finding and fixing misspellings on your webpage will help both user experience and search engine rankings.

Check your website's SEO for free right now!

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