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91 stackoverflow.com Last Updated: 4 years

Success 54% of passed verification steps

Warning 23% of total warning

Errors 23% of total errors, require fast action

Mobile

Performance Desktop Score 99%

Best Practices Desktop Score 85%

SEO Desktop Score 82%

Progressive Web App Desktop Score 56%

Performance Mobile Score 85%

Best Practices Mobile Score 85%

SEO Mobile Score 85%

Progressive Web App Mobile Score 57%

Page Authority Authority 77%

Domain Authority Domain Authority 93%

Moz Rank 7.7/10

Bounce Rate Rate 0%

Title Tag 67 Characters

STACK OVERFLOW - WHERE DEVELOPERS LEARN, SHARE, & BUILD CAREERS

Meta Description 169 Characters

Stack Overflow is the largest, most trusted online community for developers to learn, share their programming knowledge, and build their careers.

Effective URL 25 Characters

https://stackoverflow.com

Excerpt Page content

Stack Overflow - Where Developers Learn, Share, & Build Careers ...

Keywords Cloud Density

stack30 overflow23 knowledge13 developers11 find10 questions10 private10 jobs10 more9 teams9

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

Keyword	Freq	Title	Desc	Domain	H1	H2
stack	30
overflow	23
knowledge	13
developers	11
find	10
questions	10
private	10
jobs	10
more	9
teams	9

Google Preview Your look like this in google search result

STACK OVERFLOW - WHERE DEVELOPERS LEARN, SHARE, & BUILD

https://stackoverflow.com

Stack Overflow is the largest, most trusted online community for developers to learn, share their programming knowledge, and b

Robots.txt File Detected

http://stackoverflow.com/robots.txt

Sitemap.xml File No Found

http://stackoverflow.com/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: 2020-01-08 / 5 years

Create on: 2003-12-27 / 21 years

Expires on: 2021-02-02 / 44 months 2 days

Name.com, Inc. ,

Registrar Whois Server: whois.name.com

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

Nameservers

NS-1033.AWSDNS-01.ORG

NS-358.AWSDNS-44.COM

NS-CLOUD-E1.GOOGLEDOMAINS.COM

NS-CLOUD-E2.GOOGLEDOMAINS.COM

Page Size Code & Text Ratio

Document Size: ~113.44 KB

Code Size: ~81.7 KB

Text Size: ~31.74 KB Ratio: 27.98%

Social Data

Estimation Traffic and Earnings

869,331

Unique Visits

Daily

1,608,262

Pages Views

Daily

$3,106

Income

Daily

24,341,268

Unique Visits

Monthly

45,835,467

Pages Views

Monthly

$77,650

Income

Monthly

281,663,244

Unique Visits

Yearly

540,376,032

Pages Views

Yearly

$819,984

Income

Yearly

Technologies

PWA - Manifest

Manifest is not valid

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

Desktop

Largest Contentful Paint element 1 element found

This is the largest contentful element painted within the viewport

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

Links do not have descriptive text 2 links found

Descriptive link text helps search engines understand your content

Speed Index 0.7 s

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

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

Time to Interactive 0.8 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

Cumulative Layout Shift 0.009

Cumulative Layout Shift measures the movement of visible elements within the viewport

Avoid large layout shifts 5 elements found

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

Max Potential First Input Delay 40 ms

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

Eliminate render-blocking resources Potential savings of 410 ms

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

First Contentful Paint 0.7 s

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

Minimizes main-thread work 0.5 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 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

Avoids an excessive DOM size 810 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)

Serve static assets with an efficient cache policy 45 resources found

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

First CPU Idle 0.8 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/).

Total Blocking Time 0 ms

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

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

Avoids enormous network payloads Total size was 434 KiB

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

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

First Meaningful Paint 0.8 s

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

Remove unused CSS Potential savings of 86 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

Avoid chaining critical requests 10 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

Largest Contentful Paint 0.8 s

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

Initial server response time was short Root document took 90 ms

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

Keep request counts low and transfer sizes small 53 requests • 434 KiB

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

Remove unused JavaScript Potential savings of 55 KiB

Remove unused JavaScript to reduce bytes consumed by network activity

Mobile

Remove unused CSS Potential savings of 85 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

Avoid long main-thread tasks 6 long tasks found

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

Estimated Input Latency 10 ms

Keep request counts low and transfer sizes small 52 requests • 420 KiB

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

Serve static assets with an efficient cache policy 44 resources found

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

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

Document uses legible font sizes 87.29% 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

First Contentful Paint (3G) 5760 ms

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

Links do not have descriptive text 2 links found

Descriptive link text helps search engines understand your content

Max Potential First Input Delay 160 ms

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

Remove unused JavaScript Potential savings of 55 KiB

Remove unused JavaScript to reduce bytes consumed by network activity

First CPU Idle 4.2 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/).

Defer offscreen images Potential savings of 10 KiB

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

JavaScript execution time 0.5 s

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

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

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

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 2.8 s

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

Largest Contentful Paint 3.4 s

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

Minimize third-party usage Third-party code blocked the main thread for 150 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

Time to Interactive 4.9 s

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

First Contentful Paint 2.8 s

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

Largest Contentful Paint element 1 element found

This is the largest contentful element painted within the viewport

Minimizes main-thread work 1.9 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 40 ms

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

First Meaningful Paint 3.2 s

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

Total Blocking Time 100 ms

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

Eliminate render-blocking resources Potential savings of 1,760 ms

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

Avoids enormous network payloads Total size was 420 KiB

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

Avoid chaining critical requests 10 chains found

Avoids an excessive DOM size 810 elements

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

Warning! Your title is not 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

Congratulations! You not have broken links View links

First 20 Links	Relationship	HTTP Status
Stack Overflow	Internal Link	200
About	Internal Link	301
For Teams	Internal Link	301
Stack Overflow Public questions & answers	Internal Link	301
Jobs Programming & related technical career opportunities	Internal Link	301
Talent Recruit tech talent & build your employer brand	Internal Link	302
Advertising Reach developers & technologists worldwide	Internal Link	200
Log in	Internal Link	200
Sign up	Internal Link	200
help	Internal Link	200
chat	Internal Link	200
Meta Stack Overflow	Internal Link	200
Sign up	Internal Link	200
log in	Internal Link	200
Cookie Policy	Internal Link	200
Privacy Policy	Internal Link	200
Terms of Service	Internal Link	200
Home	Internal Link	301
Tags	Internal Link	301
Users	Internal Link	301

Alexa Rank

47

Global Rank

14

India

Traffic

Search

Domain Available

Domain (TDL) and Typo	Status
stackoverflow.co	Already Registered
stackoverflow.us	Already Registered
stackoverflow.com	Already Registered
stackoverflow.org	Already Registered
stackoverflow.net	Already Registered
sackoverflow.com	Already Registered
wtackoverflow.com	Available
xtackoverflow.com	Already Registered

Information Server

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

HTTP/1.1 200 OK
Connection: keep-alive
cache-control: private
content-type: text/html; charset=utf-8
content-encoding: gzip
server: Microsoft-IIS/10.0
strict-transport-security: max-age=2592000
x-route-name: Home/Index
x-frame-options: SAMEORIGIN
x-flags: AA
x-aspnet-duration-ms: 3
x-request-guid: e7cc1420-912a-479a-b3ac-8b2036d6104b
x-is-crawler: 0
x-providence-cookie: 9e03279e-0a3c-841c-1961-06674469d03b
x-page-view: 1
Accept-Ranges: bytes
Date: Mon, 24 Aug 2020 05:25:42 GMT
Via: 1.1 varnish
X-Served-By: cache-yul8921-YUL
X-Cache: MISS
X-Cache-Hits: 0
X-Timer: S1598246743.961869,VS0,VE13
Vary: Accept-Encoding,Fastly-SSL
X-DNS-Prefetch-Control: off
Set-Cookie: prov=9e03279e-0a3c-841c-1961-06674469d03b; domain=.stackoverflow.com; expires=Fri, 01-Jan-2055 00:00:00 GMT; path=/; HttpOnly

DNS Records DNS Resource Records associated with a hostname

View DNS Records

Type	Name	Value	Class	TTL
A	stackoverflow.com	151.101.1.69	IN	3536
A	stackoverflow.com	151.101.65.69	IN	3536
A	stackoverflow.com	151.101.129.69	IN	3536
A	stackoverflow.com	151.101.193.69	IN	3536
NS	stackoverflow.com	ns-1033.awsdns-01.org	IN	21599
NS	stackoverflow.com	ns-358.awsdns-44.com	IN	21599
NS	stackoverflow.com	ns-cloud-e1.googledomains.com	IN	21599
NS	stackoverflow.com	ns-cloud-e2.googledomains.com	IN	21599
MX	stackoverflow.com	aspmx.l.google.com	IN	299
MX	stackoverflow.com	alt3.aspmx.l.google.com	IN	299
MX	stackoverflow.com	alt4.aspmx.l.google.com	IN	299
MX	stackoverflow.com	alt1.aspmx.l.google.com	IN	299
MX	stackoverflow.com	alt2.aspmx.l.google.com	IN	299
TXT	stackoverflow.com	MS=ms52592611	IN	299
TXT	stackoverflow.com	atlassian-domain-verification=byLeZgl3MIcfOqwWuMhq8Fhr/1zem/jIaouJegvDZbBKUU5OqhwDjdpkyYg5CTzm	IN	299
TXT	stackoverflow.com	google-site-verification=ctogLnZNAdc_CXq8yOhODMLpmugGynjxKecKHDz4oL8	IN	299
TXT	stackoverflow.com	google-site-verification=o3EMam8yBGo1yEjyybIiZcOunGHOQKpo8JmOtp9n1BU	IN	299
TXT	stackoverflow.com	google-site-verification=rdWtMbplKjbRHGr2dNONfwkqithlUvjr3u6i8QEz_mo	IN	299
TXT	stackoverflow.com	v=spf1 ip4:198.252.206.0/24 include:_spf1.stackoverflow.com ~all	IN	299

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91 stackoverflow.com Last Updated: 4 years

Desktop

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Social Data

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Technologies

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IIS

jQuery

Varnish

Windows Server

PWA - Manifest

Desktop

Mobile

Speed And Optimization Tips

Alexa Rank

47

14

Domain Available

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