Viblo.asia - SEO Checker - Website Review

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Programming Languages

Google Tag Manager

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12 viblo.asia Last Updated: 1 year

Success 47% of passed verification steps

Warning 23% of total warning

Errors 30% of total errors, require fast action

Mobile

Performance Desktop Score 79%

Best Practices Desktop Score 92%

SEO Desktop Score 100%

Progressive Web App Desktop Score 31%

Performance Mobile Score 15%

Best Practices Mobile Score 92%

SEO Mobile Score 97%

Progressive Web App Mobile Score 33%

Page Authority Authority 40%

Domain Authority Domain Authority 39%

Moz Rank 4.0/10

Bounce Rate Rate 0%

Charset Encoding

Great, language/character encoding is specified: UTF-8

Title Tag 19 Characters

NEWEST POST - VIBLO

Meta Description 160 Characters

Technology Articles Platform from Asia, filled with latest information on Programming Languages and Frameworks. Ruby on Rails / PHP / Swift / Unity / Java /.Net

Effective URL 29 Characters

https://viblo.asia:443/newest

Excerpt Page content

Newest post - Viblo Posts Questions Discussions Announcements No announcement yet. All Announcements Sign In/Sign u...

Meta Keywords 4 Detected

Programmer Knowledge Share Programming Document Management

Keywords Cloud Density

about21 hours20 read20 trong8 javascript5 nguyen5 viblo4 hieu4 nguyễn4 android4

Keyword Consistency Keyword density is one of the main terms in SEO

Keyword	Freq	Title	Desc	Domain	H1	H2
about	21
hours	20
read	20
trong	8
javascript	5
nguyen	5
viblo	4
hieu	4
nguyễn	4
android	4

Google Preview Your look like this in google search result

NEWEST POST - VIBLO

https://viblo.asia:443/newest

Technology Articles Platform from Asia, filled with latest information on Programming Languages and Frameworks. Ruby on Rails / PHP / Swift / Unity /

Robots.txt File No Found

http://viblo.asia/robots.txt

Sitemap.xml File No Found

http://viblo.asia/sitemap.xml

Whois Is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system

Updated: 2018-12-10 / 2 years

Create on: 2015-03-27 / 6 years

Expires on: 2020-03-27 / 9 months 25 days

GMO Internet, Inc. d/b/a Onamae.com ,JP

Registrar Whois Server: whois.discount-domain.com

Registrar URL: http://www.onamae.com

Nameservers

ALBERT.NS.CLOUDFLARE.COM

DEB.NS.CLOUDFLARE.COM

Page Size Code & Text Ratio

Document Size: ~117.17 KB

Code Size: ~69.12 KB

Text Size: ~48.05 KB Ratio: 41.01%

Estimation Traffic and Earnings

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Technologies

PWA - Manifest

Manifest is not valid

Your site don't have valid manifest.json, read more in Web App Manifest

Desktop

Serve images in next-gen formats Potential savings of 223 KB

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

Reduce server response times (TTFB) Root document took 960 ms

Time To First Byte identifies the time at which your server sends a response

Eliminate render-blocking resources Potential savings of 50 ms

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles

Efficiently encode images Potential savings of 23 KB

Optimized images load faster and consume less cellular data

Minimize third-party usage Third-party code blocked the main thread for 0 ms

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading

Total Blocking Time 720 ms

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.

JavaScript execution time 1.3 s

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this

Defer offscreen images Potential savings of 17 KB

Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive

Server Backend Latencies 0 ms

Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance

Properly size images Potential savings of 280 KB

Serve images that are appropriately-sized to save cellular data and improve load time

Speed Index 1.8 s

Speed Index shows how quickly the contents of a page are visibly populated

First CPU Idle 2.5 s

First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).

Avoids enormous network payloads Total size was 1,347 KB

Large network payloads cost users real money and are highly correlated with long load times

Minimizes main-thread work 2.0 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this

First Contentful Paint 1.0 s

First Contentful Paint marks the time at which the first text or image is painted

Avoid chaining critical requests 11 chains found

The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load

Avoid an excessive DOM size 1,231 elements

A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)

First Meaningful Paint 2.0 s

First Meaningful Paint measures when the primary content of a page is visible

Keep request counts low and transfer sizes small 58 requests • 1,347 KB

To set budgets for the quantity and size of page resources, add a budget.json file

Uses efficient cache policy on static assets 3 resources found

A long cache lifetime can speed up repeat visits to your page

Max Potential First Input Delay 470 ms

The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Time to Interactive 2.7 s

Time to interactive is the amount of time it takes for the page to become fully interactive

Network Round Trip Times 0 ms

Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance

Page load is not fast enough on mobile networks Interactive on simulated mobile network at 12.5 s

A fast page load over a cellular network ensures a good mobile user experience

Estimated Input Latency 140 ms

Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy

Remove unused CSS Potential savings of 41 KB

Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity

Mobile

Avoid enormous network payloads Total size was 2,836 KB

Large network payloads cost users real money and are highly correlated with long load times

Minimize main-thread work 10.5 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this

First Contentful Paint 5.9 s

First Contentful Paint marks the time at which the first text or image is painted

Avoid chaining critical requests 8 chains found

Avoid an excessive DOM size 1,127 elements

Preload key requests Potential savings of 420 ms

Consider using `<link rel=preload>` to prioritize fetching resources that are currently requested later in page load

First Meaningful Paint 8.5 s

First Meaningful Paint measures when the primary content of a page is visible

Keep request counts low and transfer sizes small 53 requests • 2,836 KB

To set budgets for the quantity and size of page resources, add a budget.json file

Uses efficient cache policy on static assets 3 resources found

A long cache lifetime can speed up repeat visits to your page

Max Potential First Input Delay 2,260 ms

The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Time to Interactive 13.7 s

Time to interactive is the amount of time it takes for the page to become fully interactive

Network Round Trip Times 0 ms

Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance

Page load is not fast enough on mobile networks Interactive at 13.7 s

A fast page load over a cellular network ensures a good mobile user experience

Estimated Input Latency 1,420 ms

First Contentful Paint (3G) 13067 ms

First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network

Tap targets are not sized appropriately 63% appropriately sized tap targets

Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements

Document uses legible font sizes 94.4% legible text

Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px

Remove unused CSS Potential savings of 41 KB

Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity

Serve images in next-gen formats Potential savings of 1,409 KB

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

Reduce server response times (TTFB) Root document took 940 ms

Time To First Byte identifies the time at which your server sends a response

Eliminate render-blocking resources Potential savings of 150 ms

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles

Minimize third-party usage Third-party code blocked the main thread for 0 ms

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading

Total Blocking Time 4,080 ms

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.

Reduce JavaScript execution time 7.2 s

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this

Defer offscreen images Potential savings of 99 KB

Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive

Server Backend Latencies 0 ms

Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance

Properly size images Potential savings of 1,464 KB

Serve images that are appropriately-sized to save cellular data and improve load time

Speed Index 7.7 s

Speed Index shows how quickly the contents of a page are visibly populated

First CPU Idle 12.6 s

First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).

Speed And Optimization Tips

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Alexa Rank

0

Local Rank: / Users: / PageViews:

Global Rank

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server

HTTP/1.1 200 OK
Date: Thu, 16 Jan 2020 05:15:08 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Set-Cookie: __cfduid=d76637a95423aefdb948645f3b97e83691579151707; expires=Sat, 15-Feb-20 05:15:07 GMT; path=/; domain=.viblo.asia; HttpOnly; SameSite=Lax
Link: ; rel=preload; as=script, ; rel=preload; as=style, ; rel=preload; as=script, ; rel=preload; as=style, ; rel=preload; as=script, ; rel=preload; as=style, ; rel=preload; as=script, ; rel=preload; as=style, ; rel=preload; as=script, ; rel=preload; as=style, ; rel=preload; as=style, ; rel=preload; as=script, ; rel=preload; as=style, ; rel=preload; as=style
Set-Cookie: XSRF-TOKEN=cYiLmlJz-iYcIhGNJ6ugXgBYA1mUIQ1k8nCA; Path=/
Vary: Accept-Encoding
X-Frame-Options: SAMEORIGIN
X-Powered-By: Express
X-Xss-Protection: 1; mode=block
CF-Cache-Status: DYNAMIC
set-cookie: connect.sid=s%3A_tlIu7ABqEKtpqMo7O6F5lDaT8uV8SgR.dTa4q7xcEgoPn5rUiOEZyqjA2gZCJ7pMkfL6cdyo0S0; Path=/; Expires=Fri, 17 Jan 2020 05:15:08 GMT; HttpOnly
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Server: cloudflare
CF-RAY: 555d9c1b1d75c5fc-EWR
Content-Encoding: gzip

DNS Records DNS Resource Records associated with a hostname

View DNS Records

Type	Name	Value	Class	TTL
A	viblo.asia	104.27.189.151	IN	232
A	viblo.asia	104.27.188.151	IN	232
NS	viblo.asia	deb.ns.cloudflare.com	IN	86333
NS	viblo.asia	albert.ns.cloudflare.com	IN	86333
MX	viblo.asia	mx2.zoho.com	IN	300
MX	viblo.asia	mx3.zoho.com	IN	300
MX	viblo.asia	mx.zoho.com	IN	300
TXT	viblo.asia	v=spf1 include:zoho.com ~all	IN	300
TXT	viblo.asia	ca3-6b82aafe41f94f2c951dc36b5a0be0d7	IN	300
TXT	viblo.asia	v=spf1 ip4:139.162.17.246 -all	IN	300
AAAA	viblo.asia	2606:4700:30::681b:bd97	IN	158
AAAA	viblo.asia	2606:4700:30::681b:bc97	IN	158

Your Website Score is

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Top Technologies

12 viblo.asia Last Updated: 1 year

Desktop

Mobile

Estimation Traffic and Earnings

Sign up for see all features and reviews about this site

Technologies

CloudFlare

Express

Font Awesome

Google Font API

Node js

PWA - Manifest

Desktop

Mobile

Speed And Optimization Tips

Sign up for see all features and reviews about this site

Alexa Rank

0

Information Server

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