Access virtual-serial-port.org. Virtual COM Port Driver: create virtual COM ports in a system

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

72/100

10%

LCP (Largest Contentful Paint)

Value2.4 s

92/100

25%

SI (Speed Index)

Value3.5 s

88/100

10%

TBT (Total Blocking Time)

Value460 ms

62/100

30%

CLS (Cumulative Layout Shift)

Value0.055

98/100

15%

TTI (Time to Interactive)

Value8.3 s

39/100

10%

virtual-serial-port.org

256 ms

www.virtual-serial-port.org

659 ms

cookie.png

169 ms

296 ms

image.png

292 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that all of those requests were addressed to Virtual-serial-port.org and no external sources were called. The less responsive or slowest element that took the longest time to load (728 ms) belongs to the original domain Virtual-serial-port.org.

Content Size

510.9 kB

After Optimization

188.5 kB

In fact, the total size of Virtual-serial-port.org main page is 510.9 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. 25% of websites need less resources to load. HTML takes 353.1 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 296.1 kB

Original 353.1 kB
After minification 328.2 kB
After compression 57.0 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 296.1 kB or 84% of the original size.

Image Optimization

-17%

Potential reduce by 26.3 kB

Original 157.8 kB
After minification 131.5 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. Obviously, Virtual Serial Port needs image optimization as it can save up to 26.3 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

Requests Now

After Optimization

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Virtual Serial Port. According to our analytics all requests are already optimized.

Accessibility Issues

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 semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Links do not have a discernible name

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

Low

Detected JavaScript libraries

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

High

robots.txt is not valid

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

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Virtual-serial-port.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 Virtual-serial-port.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.

Social Sharing Optimization

Open Graph data is detected on the main page of Virtual Serial Port. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: