3.1 sec in total
393 ms
2.1 sec
520 ms
Visit sera.pl now to see the best up-to-date Sera content for Poland and also check out these interesting facts you probably never knew about sera.pl
Alles für Ihr Süßwasseraquarium: ✔Zierfischfutter ✔Aquarienzubehör ✔Pflegetipps. ▶ Jetzt die große sera Themenwelt Süßwasseraquarium entdecken!
Visit sera.plWe analyzed Sera.pl page load time and found that the first response time was 393 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
sera.pl performance score
name
value
score
weighting
Value3.2 s
42/100
10%
Value10.2 s
0/100
25%
Value9.4 s
12/100
10%
Value150 ms
94/100
30%
Value0.064
97/100
15%
Value11.4 s
19/100
10%
393 ms
274 ms
278 ms
375 ms
478 ms
Our browser made a total of 49 requests to load all elements on the main page. We found that 18% of them (9 requests) were addressed to the original Sera.pl, 78% (38 requests) were made to Cdn.sera.de and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (768 ms) belongs to the original domain Sera.pl.
Page size can be reduced by 262.1 kB (19%)
1.4 MB
1.1 MB
In fact, the total size of Sera.pl main page is 1.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.
Potential reduce by 46.7 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. This page needs HTML code to be minified as it can gain 6.9 kB, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 46.7 kB or 78% of the original size.
Potential reduce by 14.1 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. Sera images are well optimized though.
Potential reduce by 124.2 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 124.2 kB or 64% of the original size.
Potential reduce by 77.0 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. Sera.pl needs all CSS files to be minified and compressed as it can save up to 77.0 kB or 87% of the original size.
Number of requests can be reduced by 9 (19%)
48
39
The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sera. 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.
strona-glowna.html
393 ms
stylesheet_69295ae06f.css
274 ms
javascript_0b12553063.js
278 ms
css_combined_3.css
375 ms
mootools-core-1.4.1.js
478 ms
js_combined_3.js
469 ms
ga-pl.js
204 ms
header-verlauf.png
146 ms
sera-logo.png
144 ms
header-welle.png
144 ms
csg-52272e5c9a2c7.png
202 ms
05bca93538.jpg
145 ms
f7f7423ffa.jpg
214 ms
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214 ms
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216 ms
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214 ms
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222 ms
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323 ms
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380 ms
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320 ms
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321 ms
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321 ms
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321 ms
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371 ms
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383 ms
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383 ms
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385 ms
498bddcc75.jpg
385 ms
83f96f8f28.jpg
454 ms
54c7c3b74c.jpg
468 ms
8510b09419.jpg
469 ms
84000ba295.jpg
468 ms
seraRatgeber-Vorschau.png
669 ms
header-welle.png
125 ms
clear.gif
126 ms
ajax-loader.gif
204 ms
c6db59b18a.jpg
380 ms
092d20402f.jpg
768 ms
85c7709974.jpg
491 ms
3d6b32df3c.jpg
393 ms
teaserbg.png
436 ms
csg-52274fe46e43c.png
690 ms
supertabview-weissverlauf.png
519 ms
verlauf-hellgelb-weiss.png
363 ms
footer-verlauf.png
361 ms
footer-welle_neu24.png
475 ms
analytics.js
87 ms
collect
43 ms
baseLayoutPrint.css
98 ms
sera.pl accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
ARIA input fields do not have accessible names
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
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
Buttons do not have an accessible name
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
List items (<li>) are not contained within <ul> or <ol> parent elements.
sera.pl 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
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
sera.pl SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
robots.txt is not valid
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
PL
PL
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sera.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and it matches the claimed language. Our system also found out that Sera.pl main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
sera.pl
Open Graph description is not detected on the main page of Sera. 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: