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Click here to check amazing Isbnlib content for United States. Otherwise, check out these important facts you probably never knew about isbnlib.com
ISBN Search Engine is designed to help you find book information, download free ebooks, read online books and download the isbn data.
Visit isbnlib.comWe analyzed Isbnlib.com page load time and found that the first response time was 1 sec and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
isbnlib.com performance score
name
value
score
weighting
Value3.0 s
51/100
10%
Value3.6 s
60/100
25%
Value3.0 s
94/100
10%
Value320 ms
77/100
30%
Value0.051
99/100
15%
Value3.9 s
89/100
10%
1048 ms
221 ms
50 ms
199 ms
31 ms
Our browser made a total of 62 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Isbnlib.com, 32% (20 requests) were made to Openisbn.com and 29% (18 requests) were made to Ec1.images-amazon.com. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Isbnlib.com.
Page size can be reduced by 292.1 kB (51%)
567.9 kB
275.8 kB
In fact, the total size of Isbnlib.com main page is 567.9 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. 50% of websites need less resources to load. Javascripts take 397.4 kB which makes up the majority of the site volume.
Potential reduce by 48.8 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 48.8 kB or 69% of the original size.
Potential reduce by 19 B
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. Isbnlib images are well optimized though.
Potential reduce by 243.3 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 243.3 kB or 61% of the original size.
Number of requests can be reduced by 14 (34%)
41
27
The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Isbnlib. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and as a result speed up the page load time.
isbnlib.com
1048 ms
www.openisbn.com
221 ms
jquery.min.js
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js_counter.php
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isbnlib.com accessibility score
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
Document doesn't have a <title> element
isbnlib.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
isbnlib.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Document doesn't have a <title> element
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Page is blocked from indexing
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
N/A
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Isbnlib.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Isbnlib.com 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.
isbnlib.com
Open Graph description is not detected on the main page of Isbnlib. 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: