Access colibri.bg. Книги от Издателство Колибри — Colibri

colibri.bg screenshot

10

Performance

Renders faster than
23% of other websites
49

Accessibility

Visual factors better than
that of 20% of websites
58

Best Practices

More advanced features
available than in
20% of websites
89

SEO

Google-friendlier than
66% of websites

First Response

551 ms

Resources Loaded

6.3 sec

Page Rendered

617 ms

colibri.bg screenshot

About Website

Welcome to colibri.bg homepage info - get ready to check Colibri best content for Bulgaria right away, or after learning these important things about colibri.bg

От сайта на Издателство Колибри можете да закупите най-търсените нови книги, литература или речници - 11% отстъпка за онлайн поръчки.

Visit colibri.bg

Key Findings

We analyzed Colibri.bg page load time and found that the first response time was 551 ms and then it took 6.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

26/100

10%

LCP (Largest Contentful Paint)

Value10.7 s

0/100

25%

SI (Speed Index)

Value8.4 s

18/100

10%

TBT (Total Blocking Time)

Value1,740 ms

10/100

30%

CLS (Cumulative Layout Shift)

Value0.679

8/100

15%

TTI (Time to Interactive)

Value13.5 s

11/100

10%

colibri.bg

551 ms

www.colibri.bg

1241 ms

gtm.js

63 ms

framework.css

239 ms

framework_responsive.css

350 ms

Our browser made a total of 214 requests to load all elements on the main page. We found that 91% of them (194 requests) were addressed to the original Colibri.bg, 2% (5 requests) were made to Googletagmanager.com and 2% (4 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Colibri.bg.

Content Size

2.0 MB

After Optimization

1.8 MB

In fact, the total size of Colibri.bg main page is 2.0 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. 70% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 166.5 kB

Original 200.5 kB
After minification 188.0 kB
After compression 34.0 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 166.5 kB or 83% of the original size.

Image Optimization

-2%

Potential reduce by 40.8 kB

Original 1.7 MB
After minification 1.6 MB

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. Colibri images are well optimized though.

JavaScript Optimization

-9%

Potential reduce by 9.0 kB

Original 102.8 kB
After minification 102.2 kB
After compression 93.8 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.

CSS Optimization

-7%

Potential reduce by 2.6 kB

Original 36.6 kB
After minification 36.6 kB
After compression 34.0 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. Colibri.bg has all CSS files already compressed.

Requests Now

207

After Optimization

161

The browser has sent 207 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Colibri. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

BG
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Colibri.bg can be misinterpreted by Google and other search engines. Our service has detected that Bulgarian 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 Colibri.bg 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.

Social Sharing Optimization

colibri.bg

Open Graph description is not detected on the main page of Colibri. 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: