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Top Technologies

Nginx

Web Servers

PHP

Programming Languages

Google Tag Manager

Tag Managers

Google Font API

Font Scripts

CloudFlare

CDN

jQuery

JavaScript Frameworks

Apache

Web Servers

Font Awesome

Font Scripts

WordPress

CMS

Twitter Bootstrap

Web Frameworks

12 jb51.net Last Updated: 10 months

Success 55% of passed verification steps

Warning 15% of total warning

Errors 30% of total errors, require fast action

Mobile

Performance Desktop Score 91%

Best Practices Desktop Score 69%

SEO Desktop Score 80%

Progressive Web App Desktop Score 54%

Performance Mobile Score 31%

Best Practices Mobile Score 62%

SEO Mobile Score 90%

Progressive Web App Mobile Score 30%

Page Authority Authority 57%

Domain Authority Domain Authority 38%

Moz Rank 5.7/10

Bounce Rate Rate 0%

Charset Encoding

Great, language/character encoding is specified: GB2312

Title Tag 17 Characters

脚本之家_WWW.JB51.NET

Meta Description 99 Characters

脚本之家是国内专业的网站建设资源、脚本编程学习类网站，提供asp、php、asp.net、javascript、jquery、vbscript、dos批处理、网页制作、网络编程、网站建设等编程资料。

Effective URL 20 Characters

https://www.jb51.net

Excerpt Page content

脚本之家_www.jb51.net 脚本之家服务器常用软件手机版投稿中心关注微信快捷导航软件下载 android MAC ...

Meta Keywords 14 Detected

脚本 vbscript 正则表达式 jquery dos bat 批处理 javascript Photoshop HTML div+css ASP PHP ASP.NET

Keywords Cloud Density

python16 游戏工具13 oppo7 android7 手机软件7 javascript6 java5 camtasia5 reno5 三星galaxy4

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

Keyword	Freq	Title	Desc	Domain	H1	H2
python	16
游戏工具	13
oppo	7
android	7
手机软件	7
javascript	6
java	5
camtasia	5
reno	5
三星galaxy	4

Google Preview Your look like this in google search result

脚本之家_WWW.JB51.NET

https://www.jb51.net

Robots.txt File Detected

http://jb51.net/robots.txt

Sitemap.xml File No Found

http://jb51.net/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: 2016-05-26 / 4 years

Create on: 2006-07-22 / 14 years

Expires on: 2024-07-22 / 46 months 22 days

GoDaddy.com, LLC ,

Registrar Whois Server: whois.godaddy.com

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

Nameservers

NS1.DNSV2.COM

NS2.DNSV2.COM

Page Size Code & Text Ratio

Document Size: ~112.12 KB

Code Size: ~75.19 KB

Text Size: ~36.93 KB Ratio: 32.94%

Estimation Traffic and Earnings

Only Registered Users

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Technologies

IIS

Web Servers

Windows Server

Operating Systems

PWA - Manifest

Manifest is not valid

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

Desktop

First Meaningful Paint 0.7 s

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

Keep request counts low and transfer sizes small 104 requests • 5,040 KB

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

Use video formats for animated content Potential savings of 926 KB

Large GIFs are inefficient for delivering animated content. Consider using MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF to save network bytes

Serve static assets with an efficient cache policy 100 resources found

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

Max Potential First Input Delay 40 ms

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

Time to Interactive 0.7 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

Estimated Input Latency 10 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

Minify CSS Potential savings of 2 KB

Minifying CSS files can reduce network payload sizes

Serve images in next-gen formats Potential savings of 1,836 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

Server response times are low (TTFB) Root document took 450 ms

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

Eliminate render-blocking resources Potential savings of 10 ms

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

Enable text compression Potential savings of 122 KB

Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes

Efficiently encode images Potential savings of 775 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 0 ms

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

JavaScript execution time 0.1 s

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

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 2,927 KB

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

Speed Index 1.9 s

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

First CPU Idle 0.7 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).

Avoid enormous network payloads Total size was 5,040 KB

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

Minimizes main-thread work 1.1 s

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

robots.txt is not valid 1 error found

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed

First Contentful Paint 0.7 s

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

Includes front-end JavaScript libraries with known security vulnerabilities 2 vulnerabilities detected

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers

Avoid chaining critical requests 9 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 1,749 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)

Minify JavaScript Potential savings of 15 KB

Minifying JavaScript files can reduce payload sizes and script parse time

Mobile

First Meaningful Paint 3.0 s

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

Keep request counts low and transfer sizes small 135 requests • 5,913 KB

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

Use video formats for animated content Potential savings of 926 KB

Large GIFs are inefficient for delivering animated content. Consider using MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF to save network bytes

Serve static assets with an efficient cache policy 103 resources found

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

Max Potential First Input Delay 110 ms

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

Time to Interactive 18.3 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 18.3 s

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

Estimated Input Latency 10 ms

First Contentful Paint (3G) 5820 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 83% 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 100% 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 13 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 1,975 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

Server response times are low (TTFB) Root document took 50 ms

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

Eliminate render-blocking resources Potential savings of 470 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 744 KB

Optimized images load faster and consume less cellular data

Enable text compression Potential savings of 121 KB

Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes

Minimize third-party usage Third-party code blocked the main thread for 110 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 70 ms

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

JavaScript execution time 0.6 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 3,014 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 971 KB

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

Speed Index 14.0 s

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

First CPU Idle 5.4 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).

Avoid enormous network payloads Total size was 5,913 KB

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

Minimize main-thread work 2.3 s

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

First Contentful Paint 3.0 s

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

Includes front-end JavaScript libraries with known security vulnerabilities 2 vulnerabilities detected

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers

Avoid chaining critical requests 13 chains found

Avoid an excessive DOM size 1,232 elements

Speed And Optimization Tips

Only Registered Users

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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: Tue, 26 Nov 2019 09:09:04 GMT
Content-Type: text/html
Content-Length: 28092
Connection: keep-alive
Content-Encoding: gzip
Last-Modified: Tue, 26 Nov 2019 09:08:25 GMT
ETag: "d31a48f39a4d51:0"
Server: Microsoft-IIS/7.5
X-Powered-By: jb51.net
X-Via: 1.1 PSxgHK5pg201:0 (Cdn Cache Server V2.0), 1.1 hx172:10 (Cdn Cache Server V2.0), 1.1 PSmgshxSJC1mo35:15 (Cdn Cache Server V2.0)

DNS Records DNS Resource Records associated with a hostname

View DNS Records

Type	Name	Value	Class	TTL
A	jb51.net	58.218.204.252	IN	573
NS	jb51.net	ns1.dnsv2.com	IN	7174
NS	jb51.net	ns2.dnsv2.com	IN	7174
MX	jb51.net	mxbiz1.qq.com	IN	573
MX	jb51.net	mxbiz2.qq.com	IN	573
TXT	jb51.net	v=spf1 include:spf.mail.qq.com ~all	IN	573

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12 jb51.net Last Updated: 10 months

Desktop

Mobile

Estimation Traffic and Earnings

Sign up for see all features and reviews about this site

Technologies

IIS

Windows Server

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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