40.5 sec in total
444 ms
29.7 sec
10.4 sec
Click here to check amazing Open Library content for United States. Otherwise, check out these important facts you probably never knew about openlibrary.org
Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free.
Visit openlibrary.orgWe analyzed Openlibrary.org page load time and found that the first response time was 444 ms and then it took 40 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.
openlibrary.org performance score
name
value
score
weighting
Value2.9 s
53/100
10%
Value4.3 s
42/100
25%
Value4.3 s
77/100
10%
Value1,490 ms
14/100
30%
Value0.051
99/100
15%
Value6.5 s
58/100
10%
444 ms
1356 ms
281 ms
336 ms
1007 ms
Our browser made a total of 70 requests to load all elements on the main page. We found that 71% of them (50 requests) were addressed to the original Openlibrary.org, 19% (13 requests) were made to Covers.openlibrary.org and 6% (4 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (15 sec) belongs to the original domain Openlibrary.org.
Page size can be reduced by 1.2 MB (56%)
2.2 MB
948.7 kB
In fact, the total size of Openlibrary.org main page is 2.2 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. 60% of websites need less resources to load. Javascripts take 1.0 MB which makes up the majority of the site volume.
Potential reduce by 156.5 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 156.5 kB or 88% of the original size.
Potential reduce by 36.2 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. Open Library images are well optimized though.
Potential reduce by 746.1 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 746.1 kB or 73% of the original size.
Potential reduce by 293.0 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. Openlibrary.org needs all CSS files to be minified and compressed as it can save up to 293.0 kB or 86% of the original size.
Number of requests can be reduced by 9 (14%)
63
54
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Open Library. 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.
openlibrary.org
444 ms
openlibrary.org
1356 ms
css
281 ms
all.css
336 ms
jquery-1.3.2.min.js
1007 ms
jquery-ui-1.7.2.min.js
1544 ms
analytics.js
2029 ms
vendor.js
1954 ms
all.js
1778 ms
ia-logo.png
771 ms
0-S.jpg
1598 ms
menu.png
385 ms
openlibrary-logo.png
387 ms
search-lens.png
375 ms
down-arrow.png
373 ms
icon_ebook-avail.png
370 ms
yQWaOD4iNU5NTY0apN-qjxsxEYwM7FgeyaSgU71cLG0.woff
712 ms
D2gN9uyZ9Ucx1fJ1Fhb7sxsxEYwM7FgeyaSgU71cLG0.woff
875 ms
JiJIyYryPAkCcaWWDYi6mj8E0i7KZn-EPnyo3HZu7kw.woff
1162 ms
57TQ-anwthzkETEIO4jESBsxEYwM7FgeyaSgU71cLG0.woff
1161 ms
icons_sprite.png
158 ms
logo_IA-sm.png
10937 ms
availability
14981 ms
subjects
10654 ms
popular
1290 ms
icon_close-pop.png
1246 ms
art.svg
1176 ms
science_fiction.svg
1179 ms
fantasy.svg
1281 ms
biographies.svg
1112 ms
recipes.svg
1114 ms
romance.svg
1321 ms
textbooks.svg
1369 ms
children.svg
1134 ms
history.svg
1302 ms
medicine.svg
1441 ms
religion.svg
1369 ms
mystery_and_detective_stories.svg
1233 ms
plays.svg
1183 ms
music.svg
1406 ms
science.svg
1355 ms
carousel_prev.png
1417 ms
carousel_next.png
1434 ms
0.gif
2725 ms
6630054-M.jpg
7015 ms
icon_borrow-avail.png
312 ms
6643165-M.jpg
6323 ms
613975-M.jpg
6323 ms
6655409-M.jpg
6362 ms
6644215-M.jpg
6324 ms
6608498-M.jpg
6362 ms
OL24202389M-M.jpg
6520 ms
OL13516119M-M.jpg
6663 ms
OL14017464M-M.jpg
6664 ms
OL2300223M-M.jpg
6665 ms
OL351898M-M.jpg
6665 ms
OL7087913M-M.jpg
6664 ms
availability
6007 ms
textbooks.json
231 ms
success.json
231 ms
science_fiction.json
5956 ms
biographies.json
5956 ms
mystery_and_detective_stories.json
5955 ms
popular_print_disabled_books.json
5956 ms
Authors_Alliance.json
5890 ms
romance.json
6353 ms
textbooks.json
894 ms
success.json
753 ms
icon_borrow-not-avail.png
320 ms
science_fiction.json
582 ms
openlibrary.org 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
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
Image elements do not have [alt] attributes
openlibrary.org 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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
openlibrary.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Openlibrary.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Openlibrary.org 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.
openlibrary.org
Open Graph description is not detected on the main page of Open Library. 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: