4 sec in total
439 ms
3.4 sec
166 ms
Welcome to lehrer-online.de homepage info - get ready to check Lehrer Online best content for Germany right away, or after learning these important things about lehrer-online.de
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Visit lehrer-online.deWe analyzed Lehrer-online.de page load time and found that the first response time was 439 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
lehrer-online.de performance score
name
value
score
weighting
Value5.0 s
9/100
10%
Value6.7 s
8/100
25%
Value6.6 s
37/100
10%
Value2,180 ms
6/100
30%
Value0
100/100
15%
Value17.6 s
4/100
10%
439 ms
209 ms
206 ms
207 ms
317 ms
Our browser made a total of 53 requests to load all elements on the main page. We found that 94% of them (50 requests) were addressed to the original Lehrer-online.de, 4% (2 requests) were made to Lehreronline.adspirit.de and 2% (1 request) were made to Webstats.lehrer-online.de. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Lehrer-online.de.
Page size can be reduced by 262.2 kB (35%)
753.4 kB
491.2 kB
In fact, the total size of Lehrer-online.de main page is 753.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 30% of websites need less resources to load. Images take 439.3 kB which makes up the majority of the site volume.
Potential reduce by 21.8 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 21.8 kB or 78% of the original size.
Potential reduce by 45.0 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Lehrer Online images are well optimized though.
Potential reduce by 159.3 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 159.3 kB or 66% of the original size.
Potential reduce by 36.0 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Lehrer-online.de needs all CSS files to be minified and compressed as it can save up to 36.0 kB or 83% of the original size.
Number of requests can be reduced by 29 (56%)
52
23
The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lehrer Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.
lehrer-online.php
439 ms
main.css
209 ms
gecko.css
206 ms
lo.css
207 ms
main.js
317 ms
swfobject.js
225 ms
adscript.php
315 ms
adscript.php
307 ms
hg_lehrer_online.jpg
308 ms
logo_lehrer_online.jpg
209 ms
toplogin_btLogin.gif
212 ms
toplogin_linkarrow.gif
207 ms
toplogin_suche.gif
224 ms
menu_lehrer_online.jpg
328 ms
headrightline.gif
410 ms
headrightlightgrey.gif
411 ms
arrowbehind.gif
417 ms
ne_89-986236-1.jpg
463 ms
listarrow.gif
528 ms
logo_lug_89-841640-1.jpg
668 ms
banner_200x94_89-990543-1.gif
772 ms
losleser_logo_200x47_89-1001884-1.jpg
774 ms
bne_89-927667-1.jpg
707 ms
lo-recht_2012_47_89-825610-1.jpg
746 ms
headrightgrey.gif
848 ms
icon_redaktion.gif
926 ms
icon_newsletter.gif
950 ms
icon_rss.gif
1023 ms
icon_werbung.gif
1028 ms
inklusion2_start_100-1105255-1.png
1241 ms
ich_180_100-1105256-1.png
1213 ms
arrowinlink.gif
1151 ms
fluchtursachen_180_100-1104970-1.png
1260 ms
icon_inlink.gif
1283 ms
automatenwirtschaft_start_100-1105109-1.png
1388 ms
nl_180_100-1004906-1.png
1456 ms
icon_exlink.gif
1418 ms
arrowrss.gif
1446 ms
nl_47_100-637999-1.gif
1466 ms
banner_200x140_100-1095432-1.png
1690 ms
ccbeilo_47_100-1036130-1.png
1592 ms
icon_delicious.gif
1621 ms
icon_yahoo.gif
1650 ms
icon_google.gif
1648 ms
piwik.js
413 ms
icon_digg.gif
1467 ms
icon_wong.gif
1605 ms
icon_oneview.gif
1621 ms
footer_bg.gif
1669 ms
arrowmerkliste.gif
1616 ms
arrowempfehlen.gif
1607 ms
arrowdrucken.gif
1554 ms
arrowseitenanfang.gif
1609 ms
lehrer-online.de accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Form elements do not have associated labels
Links do not have a discernible name
lehrer-online.de best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
lehrer-online.de SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
DE
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lehrer-online.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Lehrer-online.de main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
lehrer-online.de
Open Graph description is not detected on the main page of Lehrer Online. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: