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stl-software.de website review

Visit site (opens in a new tab)Reviewed 8 November 202623 issues · 67 checks

This review found 23 issues worth fixing on stl-software.de, 7 of them high impact, across 67 checks. The most urgent: use efficient cache lifetimes. Your full playbook turns these into prioritised fixes alongside reviews, competitors and channels.

  1. Homepage
  2. Phone render
  3. Links and pages
  4. Google PageSpeed

Google PageSpeed Insights (opens in a new tab), mobile

Full-page screenshot of stl-software.de (phone) rendered by Google PageSpeed Insights

How it loaded on a phone

  1. stl-software.de at 0.6 s0.6 s
  2. stl-software.de at 1.2 s1.2 s
  3. stl-software.de at 1.8 s1.8 s
  4. stl-software.de at 2.5 s2.5 s
  5. stl-software.de at 3.1 s3.1 s
  6. stl-software.de at 3.7 s3.7 s
  7. stl-software.de at 4.3 s4.3 s
  8. stl-software.de at 4.9 s4.9 s

Speed

4 to fix91
  • Use efficient cache lifetimes

    1.6 s · 1.5 MB

    31 files are served with short cache lifetimes, so returning visitors download them again (1.5 MB).

  • Improve image delivery

    600 ms · 227 KiB

    4 images could be 227 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 600 ms faster on a phone.

  • Render-blocking requests

    500 ms

    2 files block the first paint until they finish downloading. Deferring or inlining them could save about 500 ms.

  • Font display

    400 ms

    Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 400 ms).

  • Reduce unused JavaScript

    92 KiB

    About 92 KiB of JavaScript is downloaded but never used on this page.

  • 1 long task on the main thread

    1 long task block the main thread while loading, the longest for 55 ms. During a long task the page ignores taps.

  • Reduce unused CSS

    21 KiB

    About 21 KiB of CSS is downloaded but never applied on this page.

  • Legacy JavaScript

    8 KiB

    Polyfills for old browsers add 8 KiB JavaScript that modern phones do not need.

  • Chained critical requests

    Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

3 checks passed
  • Mobile performance score: 91

    91/100

    Your mobile performance score is 91. That is in Google's “good” band (90 and up).

  • Main-thread work: 0.7 s

    A phone's processor spends 0.7 s on main-thread work while loading, 163 ms of it running JavaScript. That is comfortably low.

  • Server response: 110 ms

    110 ms

    Your server sent the HTML in 110 ms, well inside Google's 600 ms guideline.

Core Web Vitals

2 to fix97
  • Speed Index: 6.9 s

    6.9 s

    Visually, the page fills in at 6.9 s (Speed Index). Good is under 3.4 s.

  • Time to Interactive: 6.8 s

    6.8 s

    The page becomes fully interactive after 6.8 s. Good is under 3.8 s.

  • Not enough real-visitor data yet

    Chrome's UX Report (opens in a new tab) has too little real-visitor traffic for this site, so the figures here are lab measurements from Google's test phone on a throttled 4G connection.

4 checks passed
  • Largest Contentful Paint: 2.4 s

    2.4 s

    Your largest element renders in 2.4 s on a phone, inside Google's 2.5 s “good” threshold. The largest element is the element shown below.

  • Cumulative Layout Shift: 0.011

    0.011

    The layout barely moves while loading (CLS 0.011, good is under 0.1).

  • First Contentful Paint: 0.9 s

    0.9 s

    The first text or image appears after 0.9 s, inside the 1.8 s “good” threshold.

  • Total Blocking Time: 3 ms

    3 ms

    Scripts block the page for only 3 ms while loading. Good is under 200 ms.

Images and page weight

100
  • 2 images in older formats

    2 images (100 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

  • About 0.4 g of CO₂ per visit

    0.43 g

    By the Sustainable Web Design model, a visit to your homepage emits about 0.43 g of CO₂e: 51.3 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

3 checks passed
  • Page weight: 1.5 MB in 33 requests

    1.5 MB

    Your homepage downloads 1.5 MB in 33 requests on a phone: fonts 958 KiB (4), images 348 KiB (12) and scripts 188 KiB (11). That is a lean page.

  • Images load when needed

    Images below the first screen wait until the visitor scrolls to them.

  • Images are sized for phones

    No image is downloaded at more than three times the size it is drawn on a phone.

Accessibility

5 to fixGoogle 7990
  • 1 text element with low contrast

    1 text element doesn't have enough contrast against the background to read easily, especially outdoors on a phone.

  • Form elements should have a visible label (1 element)

    Form elements should have a visible label: 1 element on the page fails this check, rated serious by axe-core.

  • Links must have discernible text (1 element)

    Links must have discernible text: 1 element on the page fails this check, rated serious by axe-core.

  • Zoom is disabled

    The viewport tag blocks pinch-zoom, which low-vision visitors rely on.

  • All page content should be contained by landmarks (1 element)

    All page content should be contained by landmarks: 1 element on the page fails this check, rated moderate by axe-core.

  • Headings skip levels

    Headings skip levels (h2 → h4 and h2 → h4), which makes the page harder to scan with a screen reader.

2 checks passed
  • Every image has alt text

    All 14 images in the HTML carry an alt attribute.

  • 33 automated accessibility rules passed

    axe-core 4.13.0, the open-source engine behind most accessibility testing tools, ran 39 WCAG 2.2 A/AA and best-practice rules on the phone render: 33 passed and 6 failed. 1 more need a person to judge. Automated rules catch about a third of accessibility problems; the rest need manual testing.

SEO

3 to fixGoogle 10089
  • No social preview image

    No Open Graph image, so links shared on LinkedIn, Slack or Facebook show no preview picture.

  • No XML sitemap

    No XML sitemap at https://www.stl-software.de/sitemap.xml, so Google discovers your pages only by following links.

  • No robots.txt

    There is no robots.txt at stl-software.de/robots.txt, the first file search crawlers ask for.

  • 49 internal links, 10 external

    The homepage links to 49 pages on stl-software.de and 10 external pages.

5 checks passed
  • Meta description: 135 characters

    Your meta description is 135 characters: “STL GmbH bietet Software und Services für Trainingsmanagement in Unternehmen: Akademien ✔️ Personalentwicklung ✔️ Corpo…”.

  • One H1 headline

    Your main headline reads: “Software und Services für Trainings-, Lern- und Qualifikationsmanagement”.

  • Title: 54 characters

    Your title is a healthy 54 characters: “STL GmbH Software und Services für Trainingsmanagement”.

  • Canonical URL set

    The canonical URL is https://www.stl-software.de/cms/.

  • Structured data in place

    Structured data found: BreadcrumbList, WebPage and WebSite.

AI search readiness

1 to fix81
  • No Organization structured data

    There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

1 checks passed
  • Text is in the HTML

    Your server sends the page's text in the HTML (923 words), so crawlers that don't run JavaScript still read it.

Other pages

3 to fix83
  • 3 linked pages hidden from search

    /cimoio/site/ad_de-DE_/Seminar%20(Bildungsprodukt)_type/cimoio-Anwendertreffen_title/ID_securedGetRequest_const=l6gl4nI1DdGcZZA83QctsUN0YwS9UJoqP6lvGK2rNG4, /cimoio and /cimoio/site/ad_de-DE_/Seminar%20(Bildungsprodukt)_type/STL-GmbH-auf-der-Learntec_title/ID_securedGetRequest_const=R2DDzTwQd_ZZE2TpNRj1CDREzru0__yvuV_Y_vXqeLw are marked noindex but linked from your homepage. If they are meant to be found, remove the noindex.

  • 3 pages without a meta description

    /cimoio/site/ad_de-DE_/Seminar%20(Bildungsprodukt)_type/cimoio-Anwendertreffen_title/ID_securedGetRequest_const=l6gl4nI1DdGcZZA83QctsUN0YwS9UJoqP6lvGK2rNG4, /cimoio and /cimoio/site/ad_de-DE_/Seminar%20(Bildungsprodukt)_type/STL-GmbH-auf-der-Learntec_title/ID_securedGetRequest_const=R2DDzTwQd_ZZE2TpNRj1CDREzru0__yvuV_Y_vXqeLw have no meta description, so Google writes the search snippet from whatever text it finds.

  • 1 page without an H1

    /cimoio has no <h1> headline, so visitors and search engines get no clear main topic.

  • 1 page slow to respond

    /cms/produkte-der-stl-gmbh/mts-managed-training-services took over 3 s to send its HTML from our server.

  • 15 internal pages checked

    We fetched 15 pages linked from your homepage (of 35 found) and read each the way a search engine does.

4 checks passed
  • Linked pages load

    All 15 pages we checked loaded without an error.

  • Canonical URLs point to themselves

    No page we checked hands its ranking to a different URL.

  • Titles are unique

    Every page we checked has its own title.

  • Every page has a title

    All 15 pages that loaded have a <title>.

Best practices

1 to fixGoogle 7793
  • 5 small tap targets

    5 of 6 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

  • Browser-reported issues

    Chrome logged issues while loading the page (“Mixed content”).

2 checks passed
  • No console errors

    No JavaScript errors were logged while the page loaded on a phone.

  • Mobile viewport set

    The page declares a mobile viewport.

Content and conversion

4 to fix50
  • No call to action on the first screen

    On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

  • No calls to action

    We found no call-to-action buttons or links (such as “Book a demo” or “Get a quote”) anywhere on the homepage.

  • No analytics detected

    No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

  • No direct contact details

    No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

  • No risk reducer

    No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

  • About 892 words of copy

    The homepage carries about 892 words of visible text.

2 checks passed
  • 1 short form

    A short form (1 field at most) is right on the homepage.

  • Social proof on the page

    Social proof on the homepage: 2 customer or partner logos and 1 trust badge.

Privacy and tracking

  • 2 cookies set on arrival

    2

    Opening the homepage sets 2 cookies (measured from a US location before any click).

  • No consent tool detected

    No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

1 checks passed
  • No known trackers before consent

    No known advertising or analytics trackers load before a visitor clicks anything (measured from a US location before any click).

Security, domain, email and software versions

The security, domain and email checks, software and plugin versions, and any app with a known security problem are visible only to people at stl-software.de, because details like these could help someone attack a site. Every review keeps them private, whatever they found.

Upkeep, stack and company

Stack

CMS
WordPress
Framework
jQuery
Hosting
IONOS

Upkeep, stack, hiring and company data from programmable.info

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