4developers.org.pl Website Information

Daily Unique Visits: 754

Daily Page Views: 1,508

Income Per Day: $5

Estimated Value: $1,200

This website is located in Poland and is using following IP address 193.142.210.78. See the complete list of popular websites hosted in Poland.

4developers.org.pl is registered under .PL top-level domain. Please check other sites in .PL zone.

Website 4developers.org.pl is using the following name servers:

dns2.4developers.org.pl
dns1.4developers.org.pl

and is probably hosted by 3S S.A.. See the full list of other websites hosted by 3S S.A..

The highest website 4developers.org.pl position in Alexa rank database was 114933 and the lowest rank position was 999685. Current position of 4developers.org.pl in Alexa rank database is 950782.

Desktop speed score of 4developers.org.pl (30/100) is better than the results of 8.42% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of 4developers.org.pl (100/100) is better than the results of 100% of other sites and means that the page is mobile-friendly.

Mobile speed score of 4developers.org.pl (23/100) is better than the results of 5.79% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

4developers.org.pl Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

4developers.org.pl whois

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4developers.org.pl server information

Servers Location

4developers.org.pl desktop page speed rank

Last tested: 2018-04-03

Desktop Speed Bad

30/100

4developers.org.pl Desktop Speed Test Quick Summary

priority - 133Optimize images

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priority - 104Leverage browser caching

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Leverage browser caching for the following cacheable resources:

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priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://cdnjs.cloudflare.com/ajax/libs/jquery-easi…3/jquery.easing.min.js

Optimize CSS Delivery of the following:

https://4developers.org.pl/css/bootstrap.min.css
https://fonts.googleapis.com/css?family=Open+Sans:300,400,400i,600,700
https://4developers.org.pl/css/4dev.css
https://4developers.org.pl/css/speakers_evenotry.css
https://4developers.org.pl/css/partners.css
https://4developers.org.pl/css/animate.css

priority - 1Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 8.6KiB (72% reduction).

Compressing https://blog.4developers.org.pl/wp-json/wp/v2/posts?per_page=3 could save 8.6KiB (72% reduction).

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 7.7KiB (26% reduction).

Minifying https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js could save 5.1KiB (25% reduction) after compression.
Minifying https://cdnjs.cloudflare.com/ajax/libs/jquery-easi…3/jquery.easing.min.js could save 991B (53% reduction) after compression.
Minifying https://4developers.org.pl/js/maps.js could save 528B (46% reduction) after compression.
Minifying https://4developers.org.pl/js/wow.js could save 377B (14% reduction) after compression.
Minifying https://4developers.org.pl/js/main.js could save 340B (32% reduction) after compression.
Minifying https://www.w3schools.com/lib/w3data.js could save 316B (19% reduction) after compression.
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priority - 0Minify CSS

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Minify CSS for the following resources to reduce their size by 2.7KiB (22% reduction).

Minifying https://4developers.org.pl/css/4dev.css could save 1.4KiB (21% reduction) after compression.
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Minifying https://4developers.org.pl/css/speakers_evenotry.css could save 207B (22% reduction) after compression.
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priority - 0Minify HTML

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Minify HTML for the following resources to reduce their size by 1.4KiB (21% reduction).

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4developers.org.pl Desktop Resource Breakdown

Total Resources	248
Number of Hosts	16
Static Resources	226
JavaScript Resources	37
CSS Resources	8

4developers.org.pl mobile page speed rank

Last tested: 2018-04-03

Mobile Speed Bad

23/100

4developers.org.pl Mobile Speed Test Quick Summary

priority - 154Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

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priority - 32Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

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4developers.org.pl Mobile Resource Breakdown

Total Resources	248
Number of Hosts	16
Static Resources	226
JavaScript Resources	39
CSS Resources	8

4developers.org.pl mobile page usability

Last tested: 2018-04-03

Mobile Usability Good

100/100

4developers.org.pl HTML validation

Errors

A document must not include more than one “meta” element with its “name” attribute set to the value “description”.

Line: 13 Column: 1 - 88
"...arszawa"> <meta name="description" content="Conference for all IT developers and their managers."> <meta..."

Bad start tag in “img” in “head”.

Line: 57 Column: 2 - 15
"...oscript> <img height="1" width="1" src="https://www.facebook.com/tr?id=1692993184301992&ev=PageView &noscript=1"/> </nosc..."

Bad value “https://www.facebook.com/tr?id=1692993184301992&ev=PageView &noscript=1” for attribute “src” on element “img”: Tab, new line or carriage return found.

Line: 57 Column: 2 - 15
"...oscript> <img height="1" width="1" src="https://www.facebook.com/tr?id=1692993184301992&ev=PageView &noscript=1"/> </nosc..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 57 Column: 2 - 15
"...oscript> <img height="1" width="1" src="https://www.facebook.com/tr?id=1692993184301992&ev=PageView &noscript=1"/> </nosc..."

Stray end tag “noscript”.

Line: 58 Column: 1 - 11
"...ript=1"/> </noscript> <!-- ..."

Stray end tag “head”.

Line: 61 Column: 3 - 9
"...de --> </head> <b..."

Start tag “body” seen but an element of the same type was already open.

Line: 63 Column: 3 - 22
".../head> <body id="page-top"> ..."

Cannot recover after last error. Any further errors will be ignored.

Line: 63 Column: 3 - 22
".../head> <body id="page-top"> ..."

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4developers.org.pl Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.

4developers.org.pl TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

4DEVELOPERS.ORG.PL 4Developers – Interdyscyplinarny Festiwal IT dla Programistów

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4developers.org.pl Desktop Speed Test Quick Summary

priority - 133Optimize images

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Optimize the following images to reduce their size by 1.3MiB (76% reduction).

priority - 104Leverage browser caching

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Leverage browser caching for the following cacheable resources:

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

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priority - 154Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 129Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 1.2MiB (74% reduction).

priority - 32Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 6 blocking CSS resources. This causes a delay in rendering your page.

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4developers.org.pl HTML validation

Errors

A document must not include more than one “meta” element with its “name” attribute set to the value “description”.

Bad start tag in “img” in “head”.

Bad value “https://www.facebook.com/tr?id=1692993184301992&ev=PageView &noscript=1” for attribute “src” on element “img”: Tab, new line or carriage return found.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Stray end tag “noscript”.

Stray end tag “head”.

Start tag “body” seen but an element of the same type was already open.

Cannot recover after last error. Any further errors will be ignored.

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4developers.org.pl Ping

4developers.org.pl TRACEROUTE