7.6 sec in total
438 ms
6.6 sec
564 ms
Welcome to zavod.co.rs homepage info - get ready to check Zavod Co best content for Serbia right away, or after learning these important things about zavod.co.rs
Ј.П. "Завод за уџбенике", Обилићев венац 5, 11000 Београд, Србија J.P. "Zavod za udžbenike", Obilićev venac 5, 11000 Beograd, Srbija
Visit zavod.co.rsWe analyzed Zavod.co.rs page load time and found that the first response time was 438 ms and then it took 7.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
zavod.co.rs performance score
name
value
score
weighting
Value6.1 s
3/100
10%
Value10.1 s
0/100
25%
Value8.3 s
20/100
10%
Value200 ms
90/100
30%
Value0.102
89/100
15%
Value13.5 s
11/100
10%
438 ms
470 ms
329 ms
881 ms
35 ms
Our browser made a total of 134 requests to load all elements on the main page. We found that 1% of them (2 requests) were addressed to the original Zavod.co.rs, 95% (127 requests) were made to Knjizara.zavod.co.rs and 1% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (1.8 sec) relates to the external source Knjizara.zavod.co.rs.
Page size can be reduced by 382.5 kB (8%)
4.6 MB
4.2 MB
In fact, the total size of Zavod.co.rs main page is 4.6 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. 65% of websites need less resources to load. Images take 4.3 MB which makes up the majority of the site volume.
Potential reduce by 130.3 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 37.0 kB, which is 25% 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 130.3 kB or 89% of the original size.
Potential reduce by 248.6 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. Zavod Co images are well optimized though.
Potential reduce by 2.0 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. This website has mostly compressed JavaScripts.
Potential reduce by 1.5 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. Zavod.co.rs has all CSS files already compressed.
Number of requests can be reduced by 15 (12%)
129
114
The browser has sent 129 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zavod Co. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
zavod.co.rs
438 ms
zavod.co.rs
470 ms
www.knjizara.zavod.co.rs
329 ms
www.knjizara.zavod.co.rs
881 ms
jquery.min.js
35 ms
bootstrap.min.css
272 ms
bootstrap.min.js
66 ms
font-awesome.min.css
394 ms
css
52 ms
stylesheet.css
399 ms
owl.carousel.css
378 ms
featuredcarousel.css
407 ms
common.js
386 ms
owl.carousel.min.js
439 ms
js
76 ms
api.js
61 ms
yukari.css
544 ms
jquery-ui-1.8.16.custom.min.js
772 ms
yukari.js
552 ms
jquery.prettyPhoto.js
448 ms
youtube-video.js
468 ms
pozadina.jpg
301 ms
ser.png
182 ms
cir.png
158 ms
logo.png
158 ms
nacionalna_citanka_javni_poziv_banner.png
495 ms
e-biblioteka_background_2.jpg
178 ms
e-biblioteka_background.png
426 ms
digitalni-udzbenici_background_2.jpg
314 ms
digitalni-udzbenici_background.png
334 ms
virtuelna-ucionica_background_2.jpg
452 ms
virtuelna-ucionica_background.png
463 ms
deo-tima_background_2.jpg
471 ms
deo-tima_background.png
492 ms
studentska_kartica_popust_baner-1140x380.png
1251 ms
issuu-2-razred-os_banner-1140x380.jpg
876 ms
issuu-6-razred-os_banner-1140x380.jpg
869 ms
nagrada_niski_sajam_presad_mudrosti_hirurgija_aorte_banner-1140x380.jpg
983 ms
ekonomska_grupa_predmeta_baner-1140x380.jpg
1012 ms
34979_recnik_banner-1140x380.jpg
774 ms
hirurgija_aorte_nagrada_sajam_baner-1140x380.jpg
1139 ms
e_udzbenici_banner-1140x380.jpg
1140 ms
video_prezentacije_banner-1140x380.jpg
1404 ms
video_prezentacije_banner_srednja-1140x380.jpg
1141 ms
obavestenje_cd_audio_sadrzaj_baner-1140x380.jpg
1836 ms
klub_prosvetnih_radnika_baner-1140x380.jpg
1397 ms
besplatan-primerak-baner-1140x380.jpg
1411 ms
flajer-gimnazija.jpg
1297 ms
flajer-ekonomija-pravo-administracija.jpg
1405 ms
flajer-elektrotehnika.jpg
1453 ms
flajer-poljoprivreda.jpg
1549 ms
flajer-tekstil.jpg
1558 ms
flajer-trgovina-ugostiteljstvo-turizam.jpg
1572 ms
flajer-zdravstvo-farmacija-socijalna-zastita.jpg
1585 ms
flajer-srpski_kao_nematernji.jpg
1612 ms
36414_HIRURGIJA_Aorte_2023-160x224.jpg
1698 ms
34979-160x224.jpg
1686 ms
fontawesome-webfont.woff
1690 ms
23110_Citanka_3-160x224.jpg
1590 ms
32203_2023-160x224.jpg
1597 ms
34571-160x224.jpg
1683 ms
34596-160x224.jpg
1574 ms
30109-160x224.jpg
1592 ms
32095-160x224.jpg
1599 ms
30143-160x224.jpg
1570 ms
34188-160x224.jpg
1550 ms
33661-160x224.jpg
1547 ms
34376-160x224.jpg
1559 ms
33270-160x224.jpg
1573 ms
33681-160x224.jpg
1594 ms
34870-160x224.jpg
1380 ms
33265-160x224.jpg
1288 ms
36638-160x224.jpg
1288 ms
36621-160x224.jpg
1203 ms
34466-160x224.jpg
1209 ms
33186-160x224.jpg
1104 ms
33264_bela_soba_zoran_zivkovic-160x224.jpg
1181 ms
33097-160x224.jpg
1173 ms
34377-160x224.jpg
1064 ms
33105-160x224.jpg
1052 ms
33993-160x224.jpg
982 ms
34010-160x224.jpg
994 ms
36614-160x224.jpg
1063 ms
33279_biblioteka-160x224.jpg
1056 ms
34477-160x224.jpg
1029 ms
33990-160x224.jpg
964 ms
23188_zbirka_zadataka_hemija_3_4_gimnazija-140x196.jpg
978 ms
34979-140x196.jpg
981 ms
23172_geografija_2021-140x196.jpg
1034 ms
21086_fizika_2018-140x196.jpg
1015 ms
22120-140x196.jpg
940 ms
24176-140x196.jpg
953 ms
23703-140x196.jpg
951 ms
17525%20Ruski%207_nas_klass_ruski7-140x196.jpg
941 ms
34640-141x200.JPG
939 ms
21074_geografija_srbije-141x200.jpg
935 ms
21019-141x200.jpg
935 ms
22088_hemija_2-141x200.jpg
960 ms
21191-141x200.jpg
952 ms
15321_atlas_2022-141x200.jpg
939 ms
22192-141x200.jpg
937 ms
34901-141x200.jpg
945 ms
89001_katalog_osnovna_skola_korica_180x256-180x256.jpg
944 ms
89002_katalog_srednja_180x256-180x256.jpg
1071 ms
89130_katalog_lektira_za_osnovnu_skolu_256x363-180x256.jpg
952 ms
89003_katalog_knjiga_256x363-180x256.jpg
939 ms
89128_katalog_sabrana_i_izabrana_dela_256x363-180x256.jpg
927 ms
89123_katalog_knjige_za_decu_predskolskog_i_mladjeg_skolskog_uzrasta_256x363-180x256.jpg
946 ms
korice_narudzbenica_kataloga_za_decu-180x256.jpg
949 ms
89078_katalog_nastavna_sredstva_2014-15_256x363-180x256.jpg
988 ms
89031_katalog_sajam_2013_256x363-180x256.jpg
960 ms
korice_katalog_osnovna_skola_Madjarski-180x256.jpg
991 ms
korice_katalog_osnovna_skola_Rumunski-180x256.jpg
940 ms
korice_katalog_osnovna_skola_Rusinski-180x256.jpg
944 ms
korice_katalog_osnovna_skola_Slovacki-180x256.jpg
948 ms
korice_katalog_osnovna_skola_Bunjevci-180x256.jpg
981 ms
korice_katalog_osnovna_skola_Hrvatski-180x256.jpg
957 ms
dinacard.png
987 ms
american_express.png
943 ms
maestro.jpg
948 ms
mastercard.jpg
946 ms
visa.jpg
977 ms
icons15-facebook.png
954 ms
icons15-twitter.png
981 ms
icons15-instagram.png
946 ms
icons15-youtube.png
944 ms
icons15-blog.png
947 ms
pecat_banner.png
981 ms
verfy_by_visa.jpg
952 ms
master_card_secure_code.png
978 ms
banca_intesa.png
949 ms
left_25.png
942 ms
right_25.png
947 ms
yukari.png
972 ms
zavod.co.rs 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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
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.
zavod.co.rs 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
zavod.co.rs 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
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
SR
SR
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zavod.co.rs can be misinterpreted by Google and other search engines. Our service has detected that Serbian is used on the page, and it matches the claimed language. Our system also found out that Zavod.co.rs 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.
zavod.co.rs
Open Graph description is not detected on the main page of Zavod Co. 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: