Tools & Wizards About Us
safetyletterbox.com screenshot

Report Summary

  • 10

    Performance

    Renders faster than
    23% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 78

    SEO

    Google-friendlier than
    39% of websites

safetyletterbox.com

Secure Mailboxes & Parcel boxes | The Safety Letterbox Company

Page Load Speed

17.2 sec in total

First Response

198 ms

Resources Loaded

14.2 sec

Page Rendered

2.8 sec

safetyletterbox.com screenshot

About Website

Visit safetyletterbox.com now to see the best up-to-date Safety Letterbox content for United Kingdom and also check out these interesting facts you probably never knew about safetyletterbox.com

Over 35 years of UK Manufacturing Experience. Offering a range of mailboxes, intelligent parcel delivery boxes & multi occupancy post boxes

Visit safetyletterbox.com

Key Findings

We analyzed Safetyletterbox.com page load time and found that the first response time was 198 ms and then it took 17 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

safetyletterbox.com performance score

10

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

9/100

10%

LCP (Largest Contentful Paint)

Value5.5 s

19/100

25%

SI (Speed Index)

Value21.2 s

0/100

10%

TBT (Total Blocking Time)

Value6,750 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.35

31/100

15%

TTI (Time to Interactive)

Value33.5 s

0/100

10%

Network Requests Diagram

safetyletterbox.com

198 ms

www.safetyletterbox.com

1993 ms

js

101 ms

font-awesome.min.css

40 ms

fullmain.min.css

43 ms

Our browser made a total of 318 requests to load all elements on the main page. We found that 80% of them (255 requests) were addressed to the original Safetyletterbox.com, 3% (11 requests) were made to Fonts.gstatic.com and 3% (8 requests) were made to Embed.tawk.to. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Safetyletterbox.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (10%)

Content Size

10.4 MB

After Optimization

9.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Safetyletterbox.com main page is 10.4 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. Only a small number of websites need less resources to load. Images take 7.9 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 769.7 kB

  • Original 861.0 kB
  • After minification 861.0 kB
  • After compression 91.4 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 769.7 kB or 89% of the original size.

Image Optimization

-0%

Potential reduce by 8 B

  • Original 7.9 MB
  • After minification 7.9 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. Safety Letterbox images are well optimized though.

JavaScript Optimization

-19%

Potential reduce by 249.8 kB

  • Original 1.3 MB
  • After minification 1.3 MB
  • After compression 1.1 MB

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 249.8 kB or 19% of the original size.

CSS Optimization

-1%

Potential reduce by 3.2 kB

  • Original 264.0 kB
  • After minification 263.9 kB
  • After compression 260.8 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. Safetyletterbox.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 83 (28%)

Requests Now

300

After Optimization

217

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 300 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Safety Letterbox. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 61 to 1 for JavaScripts and from 24 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

safetyletterbox.com

safetyletterbox.com

198 ms

www.safetyletterbox.com

www.safetyletterbox.com

1993 ms

js

js

101 ms

font-awesome.min.css

font-awesome.min.css

40 ms

fullmain.min.css

fullmain.min.css

43 ms

style.min.css

style.min.css

368 ms

w3w-autosuggest-public.css

w3w-autosuggest-public.css

286 ms

menu-image.css

menu-image.css

50 ms

dashicons.min.css

dashicons.min.css

55 ms

icon

icon

56 ms

all.css

all.css

68 ms

glyphicons.css

glyphicons.css

61 ms

simple-banner.css

simple-banner.css

77 ms

style.css

style.css

65 ms

css

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85 ms

style.min.css

style.min.css

178 ms

woocommerce.min.css

woocommerce.min.css

78 ms

jquery.min.js

jquery.min.js

420 ms

wp-polyfill-inert.min.js

wp-polyfill-inert.min.js

96 ms

regenerator-runtime.min.js

regenerator-runtime.min.js

177 ms

wp-polyfill.min.js

wp-polyfill.min.js

202 ms

hooks.min.js

hooks.min.js

197 ms

w.js

w.js

46 ms

underscore.min.js

underscore.min.js

201 ms

wp-util.min.js

wp-util.min.js

201 ms

jquery.blockUI.min.js

jquery.blockUI.min.js

225 ms

add-to-cart-variation.min.js

add-to-cart-variation.min.js

214 ms

frontend-gtag.min.js

frontend-gtag.min.js

215 ms

what3words.esm.js

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48 ms

what3words.js

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56 ms

rmp-menu.js

rmp-menu.js

225 ms

simple-banner.js

simple-banner.js

227 ms

add-to-cart.min.js

add-to-cart.min.js

526 ms

js.cookie.min.js

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238 ms

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251 ms

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164 ms

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109 ms

yqf3iqe.css

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157 ms

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47 ms

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datepicker.min.js

datepicker.min.js

125 ms

addons.min.js

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122 ms

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136 ms

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449 ms

rbtools.min.js

rbtools.min.js

154 ms

rs6.min.js

rs6.min.js

203 ms

sourcebuster.min.js

sourcebuster.min.js

454 ms

order-attribution.min.js

order-attribution.min.js

219 ms

us.core.min.js

us.core.min.js

241 ms

cart-fragments.min.js

cart-fragments.min.js

337 ms

jquery.validate.min.js

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556 ms

mailcheck.min.js

mailcheck.min.js

336 ms

api.js

api.js

61 ms

punycode.min.js

punycode.min.js

353 ms

utils.min.js

utils.min.js

748 ms

wpforms.min.js

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334 ms

g.gif

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90 ms

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67 ms

analytics.js

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84 ms

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76 ms

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376 ms

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377 ms

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77 ms

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Menu-Fire-rated-parcel-220x92.jpg

77 ms

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78 ms

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79 ms

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81 ms

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467 ms

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182 ms

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183 ms

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768 ms

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183 ms

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257 ms

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466 ms

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774 ms

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menu-replacement-locks-and-keys-174x92.jpg

772 ms

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766 ms

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768 ms

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1001 ms

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1001 ms

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878 ms

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1019 ms

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1019 ms

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1395 ms

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1303 ms

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1327 ms

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1325 ms

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1229 ms

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1323 ms

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1522 ms

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1536 ms

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1536 ms

Parcel-Boxes-Icon-1-1.png

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1534 ms

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249 ms

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337 ms

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639 ms

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645 ms

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1644 ms

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647 ms

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647 ms

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646 ms

d

d

126 ms

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245 ms

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245 ms

collect

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231 ms

grid-100-2.png

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1417 ms

Multi-Occupancy-Mailboxes.jpg

Multi-Occupancy-Mailboxes.jpg

1677 ms

intelligent-parcel-boxes-1.jpg

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1646 ms

Abel_Homes_Details_Postbox-on-render-2-1024x683-copy.jpg

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1755 ms

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1750 ms

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584 ms

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1726 ms

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1752 ms

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1780 ms

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1878 ms

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1965 ms

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343 ms

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1963 ms

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501 ms

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1781 ms

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1804 ms

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www-player.css

233 ms

www-embed-player.js

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251 ms

base.js

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279 ms

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1946 ms

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1989 ms

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2018 ms

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2116 ms

recaptcha__en.js

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331 ms

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1982 ms

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1977 ms

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1952 ms

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2163 ms

myRENZbox_Backnang_BadCannstadt-flag-1024x1024.jpg

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1789 ms

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2205 ms

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2291 ms

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215 ms

mxtTbBhlryF2cIkAezdGpVGDn6_laFF5PR-N71KDL7w.js

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141 ms

embed.js

embed.js

98 ms

Coppersmith-Quarter-%E2%80%93-Stratford-05-copy-791x1024.jpg

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2124 ms

AIdro_mSsI1D4n8QTUZfArT8veCMN1KUxaWVG3xodvRKk0iLJw=s68-c-k-c0x00ffffff-no-rj

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309 ms

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1983 ms

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1993 ms

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200 ms

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196 ms

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194 ms

diffuser.js

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185 ms

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115 ms

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213 ms

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2442 ms

Create

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36 ms

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2363 ms

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2277 ms

main.js

main.js

1962 ms

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2336 ms

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the-court-house-mailboxes.jpg

2074 ms

com-1-heavy-duty-mailboxes.jpg

com-1-heavy-duty-mailboxes.jpg

2294 ms

bronze-mailboxes.jpg

bronze-mailboxes.jpg

2359 ms

multi-occupancy-mail-boxes.jpg

multi-occupancy-mail-boxes.jpg

2131 ms

colourful-mailboxes-1.jpg

colourful-mailboxes-1.jpg

1938 ms

stainless-steel-mailboxes-1.jpg

stainless-steel-mailboxes-1.jpg

2101 ms

freestanding-mailboxes.jpg

freestanding-mailboxes.jpg

1914 ms

print-works-exeter-mailboxes.jpg

print-works-exeter-mailboxes.jpg

2176 ms

horizontal-mailboxes.jpg

horizontal-mailboxes.jpg

2227 ms

burj-khalifa-bespoke-mailboxes-flag.jpg

burj-khalifa-bespoke-mailboxes-flag.jpg

2234 ms

freestanding-blue-mailboxes.jpg

freestanding-blue-mailboxes.jpg

2061 ms

stainless-steel-mailboxes.jpg

stainless-steel-mailboxes.jpg

2114 ms

red-postboxes.jpg

red-postboxes.jpg

2056 ms

wall-mounted-colourful-postboxes.jpg

wall-mounted-colourful-postboxes.jpg

2207 ms

colourful-mailboxes.jpg

colourful-mailboxes.jpg

2037 ms

Royal-Mail-Pigeon-Hole-Boxes.jpg

Royal-Mail-Pigeon-Hole-Boxes.jpg

2337 ms

highbury-freestanding-mailboxes.jpg

highbury-freestanding-mailboxes.jpg

2264 ms

wembley-fire-rated-mailboxes.jpg

wembley-fire-rated-mailboxes.jpg

2345 ms

lycee-francaise-mailboxes.jpg

lycee-francaise-mailboxes.jpg

2184 ms

the-television-centre-mailboxes.jpg

the-television-centre-mailboxes.jpg

2123 ms

wall-recessed-post-boxes.jpg

wall-recessed-post-boxes.jpg

2312 ms

wall-recessed-letter-boxes.jpg

wall-recessed-letter-boxes.jpg

2301 ms

stainless-steel-mailboxes-2.jpg

stainless-steel-mailboxes-2.jpg

2336 ms

rathbone-place-post-boxes.jpg

rathbone-place-post-boxes.jpg

2341 ms

fulham-high-street-mailboxes.jpg

fulham-high-street-mailboxes.jpg

2144 ms

through-the-wall-mailboxes-1.jpg

through-the-wall-mailboxes-1.jpg

2171 ms

com-3-with-door-entry-system.jpg

com-3-with-door-entry-system.jpg

2280 ms

in-front-out-back-mailboxes.jpg

in-front-out-back-mailboxes.jpg

2267 ms

reflections-com-2-mailbox.jpg

reflections-com-2-mailbox.jpg

2266 ms

wall-recessed-com-2-mailboxes.jpg

wall-recessed-com-2-mailboxes.jpg

2290 ms

com-1-wall-mounted-mailbox.jpg

com-1-wall-mounted-mailbox.jpg

2286 ms

wall-recessed-postboxes.jpg

wall-recessed-postboxes.jpg

2204 ms

scape-students-pink-mailboxes.jpg

scape-students-pink-mailboxes.jpg

2251 ms

student-living-postboxes.jpg

student-living-postboxes.jpg

2276 ms

moda-horizontal-stainless-steel-mailbox.jpg

moda-horizontal-stainless-steel-mailbox.jpg

2308 ms

vita-student-mailboxes.jpg

vita-student-mailboxes.jpg

2354 ms

electronic-salto-mailbox.jpg

electronic-salto-mailbox.jpg

2317 ms

Rasgas-Qatar-with-flag.jpg

Rasgas-Qatar-with-flag.jpg

2287 ms

abbeville-parcel-boxes.jpg

abbeville-parcel-boxes.jpg

2099 ms

fire-rated-2-mailboxes-1.jpg

fire-rated-2-mailboxes-1.jpg

2242 ms

fire-rated-mailboxes-wall-recessed.jpg

fire-rated-mailboxes-wall-recessed.jpg

2341 ms

fire-rated-mail-boxes-1.jpg

fire-rated-mail-boxes-1.jpg

2184 ms

fire-rated-mailboxes.jpg

fire-rated-mailboxes.jpg

2262 ms

Wolff-Muller-Building-Facilities-flag.jpg

Wolff-Muller-Building-Facilities-flag.jpg

2196 ms

Carrefour-Fresh-Frozen-flag.jpg

Carrefour-Fresh-Frozen-flag.jpg

2157 ms

barratt-homes-camden-road.jpg

barratt-homes-camden-road.jpg

2193 ms

BUGA-Horticultural-Garden-Show-flag.jpg

BUGA-Horticultural-Garden-Show-flag.jpg

2225 ms

mulberry-homes-myrenzbox-parcel-boxes.jpg

mulberry-homes-myrenzbox-parcel-boxes.jpg

2304 ms

hifx-smart-parcel-boxes.jpg

hifx-smart-parcel-boxes.jpg

2310 ms

myrenzbox-parcel-boxes.jpg

myrenzbox-parcel-boxes.jpg

2315 ms

get-living-victory-plaza-parcel-boxes.jpg

get-living-victory-plaza-parcel-boxes.jpg

2213 ms

canning-town-mailboxes.jpg

canning-town-mailboxes.jpg

2240 ms

Secure-Information-Box-SIB-PIB-Installed.jpg

Secure-Information-Box-SIB-PIB-Installed.jpg

2257 ms

Roman_211105_1114-1024x1024.jpg

Roman_211105_1114-1024x1024.jpg

1911 ms

made-in-britain2.png

made-in-britain2.png

1889 ms

Student-Parcel-Banner-2-1024x815.jpg

Student-Parcel-Banner-2-1024x815.jpg

1897 ms

ISO-9001-Accreditation-1024x815.jpg

ISO-9001-Accreditation-1024x815.jpg

2098 ms

GSY_240315_one_maidenhead_0061_Panorama-copy-1024x782.jpg

GSY_240315_one_maidenhead_0061_Panorama-copy-1024x782.jpg

1667 ms

SIB-Photo-MP-copy-1024x1016.jpg

SIB-Photo-MP-copy-1024x1016.jpg

1603 ms

ao-cbi-image-3-1024x815.jpg

ao-cbi-image-3-1024x815.jpg

1960 ms

Marches-copy.jpg

Marches-copy.jpg

1554 ms

1699031478549-600x338.jpg

1699031478549-600x338.jpg

1829 ms

OFFICIAL-RIBA-CPD-RED-LOGO.png

OFFICIAL-RIBA-CPD-RED-LOGO.png

1757 ms

1200px-National_Building_Specification_logo-stroke.png

1200px-National_Building_Specification_logo-stroke.png

1588 ms

made-in-the-uk.jpg

made-in-the-uk.jpg

1926 ms

end-to-end-customer-support.jpg

end-to-end-customer-support.jpg

1906 ms

feature-box-01@2x.png

feature-box-01@2x.png

1935 ms

CSR-Image-1.jpg

CSR-Image-1.jpg

1835 ms

fully-tested-and-certified.jpg

fully-tested-and-certified.jpg

1758 ms

market-leaders.jpg

market-leaders.jpg

1558 ms

MiB_Logo_Stacked_Colour-300x70.png

MiB_Logo_Stacked_Colour-300x70.png

1591 ms

239-2391564_investors-in-people-logo-300x92.png

239-2391564_investors-in-people-logo-300x92.png

1570 ms

MiB_Logo_Stacked_Colour-1024x239.png

MiB_Logo_Stacked_Colour-1024x239.png

1728 ms

iso-footer.jpg

iso-footer.jpg

1909 ms

IASME-Lvl-2-Logo-footer.jpg

IASME-Lvl-2-Logo-footer.jpg

1719 ms

GOLD-School-footer.jpg

GOLD-School-footer.jpg

1496 ms

smas-footer.jpg

smas-footer.jpg

1699 ms

MIB-footer.jpg

MIB-footer.jpg

1625 ms

1200px-Exova_logo.svg-1024x402.png

1200px-Exova_logo.svg-1024x402.png

1575 ms

Safety-Letterbox-_0004_Layer-3.png

Safety-Letterbox-_0004_Layer-3.png

1574 ms

Safety-Letterbox-_0003_Layer-4.png

Safety-Letterbox-_0003_Layer-4.png

1675 ms

parcel-boxes.jpg

parcel-boxes.jpg

1489 ms

CBI.jpg

CBI.jpg

1541 ms

Construction-line-footer.jpg

Construction-line-footer.jpg

1536 ms

SSIPS-Footer.jpg

SSIPS-Footer.jpg

1377 ms

NBS-Footer-Logo.jpg

NBS-Footer-Logo.jpg

1578 ms

wales-footer.jpg

wales-footer.jpg

1618 ms

chambers-wales-logo.jpg

chambers-wales-logo.jpg

1676 ms

twk-event-polyfill.js

twk-event-polyfill.js

243 ms

twk-main.js

twk-main.js

85 ms

twk-vendor.js

twk-vendor.js

117 ms

twk-chunk-vendors.js

twk-chunk-vendors.js

172 ms

twk-chunk-common.js

twk-chunk-common.js

165 ms

twk-runtime.js

twk-runtime.js

120 ms

twk-app.js

twk-app.js

145 ms

Accessibility Review

safetyletterbox.com accessibility score

82

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

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

High

Form elements do not have associated labels

Best Practices

safetyletterbox.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

safetyletterbox.com SEO score

78

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

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

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 Safetyletterbox.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 Safetyletterbox.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.

Social Sharing Optimization

safetyletterbox.com

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