Tools & Wizards About Us
high-voltage-lab.com screenshot

Report Summary

  • 64

    Performance

    Renders faster than
    77% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

high-voltage-lab.com

Circuit diagrams search engine :: High-Voltage-Lab.com :: audio, radio, sensors, digital electronics...

Page Load Speed

2.3 sec in total

First Response

202 ms

Resources Loaded

2 sec

Page Rendered

153 ms

high-voltage-lab.com screenshot

About Website

Click here to check amazing High Voltage Lab content. Otherwise, check out these important facts you probably never knew about high-voltage-lab.com

Online collection of circuit diagrams with built in search engine. DIY heaven! Build your own electronic devices.

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Key Findings

We analyzed High-voltage-lab.com page load time and found that the first response time was 202 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

high-voltage-lab.com performance score

64

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

54/100

25%

SI (Speed Index)

Value4.2 s

77/100

10%

TBT (Total Blocking Time)

Value240 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0.232

54/100

15%

TTI (Time to Interactive)

Value8.4 s

39/100

10%

Network Requests Diagram

high-voltage-lab.com

202 ms

high-voltage-lab.com

353 ms

www.high-voltage-lab.com

181 ms

www.high-voltage-lab.com

341 ms

style.css

82 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 93% of them (53 requests) were addressed to the original High-voltage-lab.com, 4% (2 requests) were made to Pagead2.googlesyndication.com and 2% (1 request) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (397 ms) belongs to the original domain High-voltage-lab.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 54.3 kB (25%)

Content Size

216.1 kB

After Optimization

161.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of High-voltage-lab.com main page is 216.1 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. 20% of websites need less resources to load. Javascripts take 103.6 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 14.8 kB

  • Original 18.6 kB
  • After minification 17.0 kB
  • After compression 3.7 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 14.8 kB or 80% of the original size.

Image Optimization

-24%

Potential reduce by 22.2 kB

  • Original 92.5 kB
  • After minification 70.3 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, High Voltage Lab needs image optimization as it can save up to 22.2 kB or 24% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-16%

Potential reduce by 16.8 kB

  • Original 103.6 kB
  • After minification 100.0 kB
  • After compression 86.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 16.8 kB or 16% of the original size.

CSS Optimization

-26%

Potential reduce by 358 B

  • Original 1.4 kB
  • After minification 1.4 kB
  • After compression 1.0 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. High-voltage-lab.com needs all CSS files to be minified and compressed as it can save up to 358 B or 26% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

29

After Optimization

29

  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of High Voltage Lab. According to our analytics all requests are already optimized.

Network Requests Diagram

high-voltage-lab.com

high-voltage-lab.com

202 ms

high-voltage-lab.com

high-voltage-lab.com

353 ms

www.high-voltage-lab.com

www.high-voltage-lab.com

181 ms

www.high-voltage-lab.com

www.high-voltage-lab.com

341 ms

style.css

style.css

82 ms

show_ads.js

show_ads.js

27 ms

urchin.js

urchin.js

8 ms

style.css

style.css

134 ms

adsbygoogle.js

adsbygoogle.js

64 ms

__utm.gif

__utm.gif

31 ms

bckg.jpg

bckg.jpg

239 ms

industrial.png

industrial.png

96 ms

logo.png

logo.png

155 ms

folder.png

folder.png

156 ms

fig1.gif

fig1.gif

161 ms

cir6.gif

cir6.gif

162 ms

4017.gif

4017.gif

168 ms

schematic.gif

schematic.gif

167 ms

phonehold.gif

phonehold.gif

228 ms

schematic.gif

schematic.gif

227 ms

phonecut.gif

phonecut.gif

235 ms

supply6.gif

supply6.gif

237 ms

currentsensor.gif

currentsensor.gif

246 ms

supplyrec.gif

supplyrec.gif

246 ms

cir48.jpg

cir48.jpg

304 ms

cir_msr019.gif

cir_msr019.gif

305 ms

amp18.gif

amp18.gif

316 ms

flampdrv.gif

flampdrv.gif

318 ms

dvc200_c.gif

dvc200_c.gif

328 ms

schematic.gif

schematic.gif

329 ms

fig01_th.gif

fig01_th.gif

381 ms

sinegen.gif

sinegen.gif

382 ms

block_diagram.gif

block_diagram.gif

394 ms

tubeamp.gif

tubeamp.gif

397 ms

industrial.png

industrial.png

222 ms

logo.png

logo.png

262 ms

folder.png

folder.png

232 ms

fig1.gif

fig1.gif

234 ms

cir6.gif

cir6.gif

246 ms

4017.gif

4017.gif

239 ms

schematic.gif

schematic.gif

239 ms

phonehold.gif

phonehold.gif

234 ms

schematic.gif

schematic.gif

240 ms

phonecut.gif

phonecut.gif

248 ms

supply6.gif

supply6.gif

246 ms

currentsensor.gif

currentsensor.gif

240 ms

supplyrec.gif

supplyrec.gif

244 ms

cir48.jpg

cir48.jpg

234 ms

cir_msr019.gif

cir_msr019.gif

239 ms

amp18.gif

amp18.gif

249 ms

flampdrv.gif

flampdrv.gif

248 ms

dvc200_c.gif

dvc200_c.gif

241 ms

schematic.gif

schematic.gif

241 ms

fig01_th.gif

fig01_th.gif

235 ms

sinegen.gif

sinegen.gif

239 ms

block_diagram.gif

block_diagram.gif

252 ms

tubeamp.gif

tubeamp.gif

249 ms

Accessibility Review

high-voltage-lab.com accessibility score

94

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Internationalization and localization

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

Impact

Issue

High

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

Best Practices

high-voltage-lab.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Page has valid source maps

SEO Factors

high-voltage-lab.com SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise High-voltage-lab.com can be misinterpreted by Google and other search engines. Our service has detected that English 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 High-voltage-lab.com main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

high-voltage-lab.com

Open Graph description is not detected on the main page of High Voltage Lab. 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: