4.3 sec in total
166 ms
3 sec
1.1 sec
Welcome to letterboxlab.com homepage info - get ready to check Letterbox Lab best content right away, or after learning these important things about letterboxlab.com
Fun science experiments for kids that come with everything you need to play with science. Purchase as a science subscription box or individually.
Visit letterboxlab.comWe analyzed Letterboxlab.com page load time and found that the first response time was 166 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
letterboxlab.com performance score
name
value
score
weighting
Value4.0 s
22/100
10%
Value10.2 s
0/100
25%
Value6.8 s
35/100
10%
Value410 ms
66/100
30%
Value0.117
85/100
15%
Value12.1 s
16/100
10%
166 ms
464 ms
61 ms
95 ms
174 ms
Our browser made a total of 102 requests to load all elements on the main page. We found that 89% of them (91 requests) were addressed to the original Letterboxlab.com, 3% (3 requests) were made to Fonts.gstatic.com and 1% (1 request) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Letterboxlab.com.
Page size can be reduced by 125.6 kB (7%)
1.8 MB
1.7 MB
In fact, the total size of Letterboxlab.com main page is 1.8 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.5 MB which makes up the majority of the site volume.
Potential reduce by 78.1 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 78.1 kB or 81% of the original size.
Potential reduce by 29.8 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. Letterbox Lab images are well optimized though.
Potential reduce by 146 B
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 146 B or 22% of the original size.
Potential reduce by 17.5 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. Letterboxlab.com has all CSS files already compressed.
Number of requests can be reduced by 56 (59%)
95
39
The browser has sent 95 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Letterbox Lab. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 33 to 1 for JavaScripts and from 25 to 1 for CSS and as a result speed up the page load time.
letterboxlab.com
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letterboxlab.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
letterboxlab.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
letterboxlab.com 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
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Letterboxlab.com 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 Letterboxlab.com 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.
letterboxlab.com
Open Graph data is detected on the main page of Letterbox Lab. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: