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Top Technologies

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Google Font API

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Web Servers

26 ef.co.id Last Updated: 7 months

Success 55% of passed verification steps

Warning 15% of total warning

Errors 30% of total errors, require fast action

Mobile

Performance Desktop Score 78%

Best Practices Desktop Score 79%

SEO Desktop Score 100%

Progressive Web App Desktop Score 26%

Performance Mobile Score 26%

Best Practices Mobile Score 79%

SEO Mobile Score 100%

Progressive Web App Mobile Score 29%

Page Authority Authority 43%

Domain Authority Domain Authority 37%

Moz Rank 4.3/10

Bounce Rate Rate 0%

Title Tag 49 Characters

BELAJAR BAHASA INGGRIS CEPAT DENGAN ENGLISH FIRST

Meta Description 301 Characters

EF English First or Education first is an education institution with international standard since 1965 which offers the best option in Indonesia for Learning English Language, High School Abroad, Study Abroad, Language Homestay, International Boarding School, and University Preparation Program Abroad

Effective URL 20 Characters

https://www.ef.co.id

Excerpt Page content

Belajar Bahasa Inggris Cepat dengan English First ...

Keywords Cloud Density

bahasa26 inggris16 program15 untuk10 belajar9 kursus9 negeri8 luar8 dengan7 kami6

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

Keyword	Freq	Title	Desc	Domain	H1	H2
bahasa	26
inggris	16
program	15
untuk	10
belajar	9
kursus	9
negeri	8
luar	8
dengan	7
kami	6

Google Preview Your look like this in google search result

BELAJAR BAHASA INGGRIS CEPAT DENGAN ENGLISH FIRST

https://www.ef.co.id

EF English First or Education first is an education institution with international standard since 1965 which offers the best option in Indonesia for L

Robots.txt File Detected

http://ef.co.id/robots.txt

Sitemap.xml File No Found

http://ef.co.id/sitemap.xml

Page Size Code & Text Ratio

Document Size: ~69.06 KB

Code Size: ~39.87 KB

Text Size: ~29.19 KB Ratio: 42.27%

Social Data

Estimation Traffic and Earnings

41,405

Unique Visits

Daily

76,599

Pages Views

Daily

$74

Income

Daily

1,159,340

Unique Visits

Monthly

2,183,072

Pages Views

Monthly

$1,850

Income

Monthly

13,415,220

Unique Visits

Yearly

25,737,264

Pages Views

Yearly

$19,536

Income

Yearly

Technologies

CloudFlare

CDN

Google Tag Manager

Tag Managers

PWA - Manifest

Manifest is not valid

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

Desktop

Time to Interactive 2.3 s

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

Avoid chaining critical requests 14 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

Includes front-end JavaScript libraries with known security vulnerabilities 4 vulnerabilities detected

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

Minimizes main-thread work 1.7 s

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

Initial server response time was short Root document took 210 ms

Keep the server response time for the main document short because all other requests depend on it

User Timing marks and measures 2 user timings

Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences

Estimated Input Latency 20 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

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

Eliminate render-blocking resources Potential savings of 0 ms

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

First CPU Idle 1.8 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 large layout shifts 1 element found

These DOM elements contribute most to the CLS of the page.

Avoid an excessive DOM size 1,901 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)

Efficiently encode images Potential savings of 9 KiB

Optimized images load faster and consume less cellular data

Keep request counts low and transfer sizes small 104 requests • 1,488 KiB

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

JavaScript execution time 0.7 s

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

Minimize third-party usage Third-party code blocked the main thread for 40 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

Avoid serving legacy JavaScript to modern browsers Potential savings of 20 KiB

Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers

Max Potential First Input Delay 70 ms

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

First Contentful Paint 0.9 s

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

Serve images in next-gen formats Potential savings of 183 KiB

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

Largest Contentful Paint 2.9 s

Largest Contentful Paint marks the time at which the largest text or image is painted

Remove unused CSS Potential savings of 98 KiB

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

Preload key requests Potential savings of 520 ms

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

Largest Contentful Paint element 1 element found

This is the largest contentful element painted within the viewport

Avoids enormous network payloads Total size was 1,488 KiB

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

Speed Index 1.7 s

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

Avoid long main-thread tasks 4 long tasks found

Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay

Page load is not fast enough on mobile networks Interactive on simulated mobile network at 13.8 s

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

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

Remove unused JavaScript Potential savings of 309 KiB

Remove unused JavaScript to reduce bytes consumed by network activity

Minify JavaScript Potential savings of 13 KiB

Minifying JavaScript files can reduce payload sizes and script parse time

Avoids large JavaScript libraries with smaller alternatives 0 large libraries found

Large JavaScript libraries can lead to poor performance. Prefer smaller, functionally equivalent libraries to reduce your bundle size

Serve static assets with an efficient cache policy 33 resources found

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

Total Blocking Time 20 ms

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

First Meaningful Paint 0.9 s

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

Mobile

Avoid an excessive DOM size 1,890 elements

Largest Contentful Paint element 1 element found

This is the largest contentful element painted within the viewport

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

Avoid serving legacy JavaScript to modern browsers Potential savings of 20 KiB

Preload key requests Potential savings of 4,080 ms

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

Avoid large layout shifts 2 elements found

These DOM elements contribute most to the CLS of the page.

Remove unused JavaScript Potential savings of 308 KiB

Remove unused JavaScript to reduce bytes consumed by network activity

Page load is not fast enough on mobile networks Interactive at 12.9 s

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

First CPU Idle 8.0 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/).

Minify JavaScript Potential savings of 13 KiB

Minifying JavaScript files can reduce payload sizes and script parse time

First Contentful Paint 4.0 s

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

Initial server response time was short Root document took 50 ms

Keep the server response time for the main document short because all other requests depend on it

Estimated Input Latency 70 ms

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

User Timing marks and measures 2 user timings

Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences

Reduce the impact of third-party code Third-party code blocked the main thread for 850 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

Reduce JavaScript execution time 3.1 s

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

Remove unused CSS Potential savings of 99 KiB

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

Time to Interactive 12.9 s

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

Eliminate render-blocking resources Potential savings of 900 ms

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

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

Largest Contentful Paint 10.8 s

Largest Contentful Paint marks the time at which the largest text or image is painted

Tap targets are sized appropriately 100% 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

Speed Index 6.3 s

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

First Meaningful Paint 5.3 s

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

First Contentful Paint (3G) 8415 ms

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

Efficiently encode images Potential savings of 92 KiB

Optimized images load faster and consume less cellular data

Minimize main-thread work 5.2 s

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

Keep request counts low and transfer sizes small 103 requests • 1,567 KiB

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

Max Potential First Input Delay 450 ms

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

Avoid chaining critical requests 14 chains found

Avoids large JavaScript libraries with smaller alternatives 0 large libraries found

Large JavaScript libraries can lead to poor performance. Prefer smaller, functionally equivalent libraries to reduce your bundle size

Avoid long main-thread tasks 20 long tasks found

Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay

Includes front-end JavaScript libraries with known security vulnerabilities 4 vulnerabilities detected

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

Serve static assets with an efficient cache policy 34 resources found

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

Total Blocking Time 930 ms

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

Serve images in next-gen formats Potential savings of 306 KiB

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

Avoids enormous network payloads Total size was 1,567 KiB

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

Speed And Optimization Tips

Website speed has a huge impact on performance, affecting user experience, conversion rates and even rankings. ‪‬‬By reducing page load-times, users are less likely to get distracted and the search engines are more likely to reward you by ranking you

Title Website

Congratulations! Your title is optimized

Description Website

Warning! Your description is not optimized

Robots.txt

Congratulations! Your site have a robots.txt file

Sitemap.xml

Warning! Not found a sitemap file for your website

SSL Secure

Congratulations! Your site have Support to HTTPS

Headings

Congratulations! You are using your H1 and H2 tags in your site

Blacklist

Congratulations! Your site is not listed in a blacklist

W3C Validator

Warning! Your site have errors W3C

Accelerated Mobile Pages (AMP)

Warning! Your site not have AMP Version

Domain Authority

Congratulations! Your Domain Authority is good

GZIP Compress

Warning! Your site not is compressed, this can make slower response for the visitors

Favicon

Congratulations! Your website appears to have a favicon.

Broken Links

Warning! You have broken links View links

First 20 Links	Relationship	HTTP Status
http://ef.co.id/	Internal Link	301
Daftar program Lihat semua program	Internal Link	301
Kantor dan sekolah Kantor terdekat	Internal Link	301
Tentang EF Cerita kami	Internal Link	301
Umur 3-6	Internal Link	301
Umur 7-9	Internal Link	301
Umur 10-14	Internal Link	301
Umur 15-18 (SMA)	Internal Link	301
Umur 18+	Internal Link	0
Program Bahasa untuk Perusahaan	Internal Link	301
SMA Swasta Internasional Berasrama SMA Swasta Internasional Berasrama Dapatkan diploma IB atau A-Level dari EF Academy – International Boarding Schools yang menjamin Anda mendapatkan jalur penempatan di universitas peringkat atas. EF Academy	Internal Link	301
Program Persiapan Universitas Masuk ke universitas di negara berbahasa Inggris dengan program persiapan yang komprehensif di luar negeri. Program Persiapan Universitas	Internal Link	301
EF Teacher Zone	Internal Link	301
EF Pro Cycling	Internal Link	301
Cari tahu lebih lanjut	Internal Link	301
Baca selengkapnya	Internal Link	301
EF Languages Year Abroad	Internal Link	301
Brosur gratis	Internal Link	301
EF Homestay	Internal Link	301
Brosur gratis	Internal Link	301

Alexa Rank

68,314

Global Rank

896

Indonesia

Traffic

Search

Information Server

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

HTTP/2 200 
date: Fri, 25 Sep 2020 07:46:26 GMT
content-type: text/html; charset=utf-8
set-cookie: __cfduid=d12180e68f9d313bc338c2a80c6ac9e301601019986; expires=Sun, 25-Oct-20 07:46:26 GMT; path=/; domain=.www.ef.co.id; HttpOnly; SameSite=Lax
cf-ray: 5d8321a519e7f991-YYZ
access-control-allow-origin: *
age: 0
cache-control: max-age=604800, stale-while-revalidate=3600, stale-if-error=3600
last-modified: Thu, 17 Sep 2020 21:21:32 GMT
strict-transport-security: max-age=31536000; includeSubDomains
vary: Accept-Encoding
cf-cache-status: HIT
access-control-allow-headers: Content-Type
cf-request-id: 0565d35b320000f991fe14f200000001
ef-worker-version: 2.8.1-main
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
isexcludefolderloop: In
loggingitemloop: In
logintofilesystemfn: In
logsitecoreloop: Inloop
x-content-type-options: nosniff
x-powered-by-srv: Web2
x-supercache: hit
x-supercache-key: website\&mc=id&type=1&browser=std
x-ua-compatible: IE=edge,chrome=1
x-xss-protection: 1; mode=block
server: cloudflare
content-encoding: gzip

DNS Records DNS Resource Records associated with a hostname

View DNS Records

Type	Name	Value	Class	TTL
A	ef.co.id	54.77.114.145	IN	86393
NS	ef.co.id	ns.domainnetwork.se	IN	86400
NS	ef.co.id	ns2.domainnetwork.se	IN	86400
MX	ef.co.id	smtp.domainnetwork.net	IN	86400
TXT	ef.co.id	ahrefs-site-verification_a08661c2390e2fa794d961bdf1ea1c2778c70a59f4adc37a2c97d8f1c489182d	IN	600
TXT	ef.co.id	google-site-verification=difbax8tyD0XMQqwY5nIIr_PwOY3STZR4xsBK2tDAYM	IN	86400

Your Website Score is

Similar Ranking

Latest Sites

Top Technologies

26 ef.co.id Last Updated: 7 months

Desktop

Mobile

Social Data

Estimation Traffic and Earnings

Technologies

CloudFlare

Google Tag Manager

PWA - Manifest

Desktop

Mobile

Speed And Optimization Tips

Alexa Rank

68,314

896

Information Server

Comments

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