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slso.org

https://slso.org· First analyzed 21 May 2026· Updated 21 May 2026
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slso.org
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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

44.216.221.18

Site Location

🇺🇸 United Statesvia phone

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

Nginx

CDN

Azure Cdn

Nameservers

ns2-06.azure-dns.net.ns3-06.azure-dns.org.ns4-06.azure-dns.info.ns1-06.azure-dns.com.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
781 ms10%
Speed Index
1.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.4 MB
185 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
SLSO 2025v2.1.0.10Custom
by Paradigm New Media Group
View Theme

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

12 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Facebook Pixel
Hotjar

Plugins

2
Quick Pagepost Redirect Plugin
Yoast SEO

Libraries

1
jQueryv3.7.1

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Advertising

1
Microsoft Advertising

Web Servers

1
Nginxv1.18.0

SEO Analysis

A81/100
25
3
2
Meta Tags15/15
Content3/12
Headings8/8
Technical24/25
E-E-A-T5/7
Images2/7
Links4/5
URL5/5
Social4/5
Freshness4/4
Mobile4/4
Indexability3/3
S
slso.orgslso.org

St. Louis Symphony Orchestra - Welcome to the SLSO

Enjoy a season of exhilarating music by your St. Louis Symphony Orchestra at the grand reopening of Powell Hall. Explore the SLSO schedule!

Title Length50 chars

Recommended: 50-60 chars (~317px / 580px)

Description Length139 chars

Recommended: 120-160 chars

Issues (2)

  • • Very thin content (12 words). Search engines need substantial content for ranking.
  • • Most images missing alt text (93/130) — critical for accessibility and SEO

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

13 URLs

13 sub-sitemaps

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

27/100
Needs Work
8 8 1

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AI & LLM Readiness

D45/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
8/25
Citation
10/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:1%
Words:1,045
Token eff.:Optimal

Structured Data

5 JSON-LD
Person×1.3WebSiteBreadcrumbListSearchAction
sameAs entity links

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
83/100
15
Passed
2
Critical
1
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
15/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
8/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
34/100
E
352 mg
CO₂e / view
3.4 MB
Page Weight
15%
Cleaner Than
New Visitor
402 mg
vs
Returning (cached)
201 mg
Annual (10K/mo)
42.3 kg
Emission Segments
Data Center
17 mg
Network
104 mg
Device
231 mg
Resource Breakdown
JavaScript
322.3 KB
Images
2.8 MB
CSS
219.5 KB
HTML
78.3 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

48d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

09.04.2026

Valid Until

08.07.2026

Subject Alternative Names (8)

powellhall.slso.orgsaintlouissymphony.orgslso.orgstlsymphony.orgsymphonychorus.slso.orgwww.saintlouissymphony.orgwww.slso.orgwww.stlsymphony.org

SHA-256 Fingerprint

48:2A:21:28:35:91:CB:1D:A7:4A:96:47:ED:6B:E1:1B:C2:55:78:A3...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Thu, 21 May 2026 14:36:39 GMT
link
<https://slso.org/wp-json/>; rel="https://api.w.org/", <http...
server
nginx/1.18.0 (Ubuntu)
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

slso-org.mail.protection.outlook.com

Domain Information

slso.org

Domain Age
28y 6m

Created

21.11.1997

Expires

20.11.2029

Last Updated

15.10.2024

Registrar

Network Solutions, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
A
80/100
Mobile Friendly135 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1, viewport-fit=cover
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

FrequencyDisplay + Dia

WCAG AAA
80/100
Readability
/30
20/30

18px · LH 1.33

Hierarchy
/20
15/20

✓ H1→H6 order

WCAG
/25
25/25

17.61:1 min contrast

Performance
/25
20/25

2 fonts · 3 req

Heading Font

FrequencyDisplay

Sans0

Body Font

Dia

Sans18px

Contrast Ratio

17.61:1

WCAG AAA (≥7:1)

Reading Comfort

~37 CPL

Narrow lines
16px
h1
90px
h2
45px
h3
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 17.6:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

Buy on MyFontsFluid Type (rem)Flesch 0

Color Palette

7 unique colors
Dark
#000000
Background· 35.4%
#f1eae2
Primary· 21.2%
#533b30
Secondary· 11.5%
#9e7961
Secondary· 10.9%
#331e1a
Secondary· 7.2%
#dbcec3
Secondary· 4.7%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

4
Google Tag ManagerFree
Google AnalyticsFree
HotjarMid-Market
Lucky OrangeSMB

User behavior and product analytics

Advertising

2
Facebook PixelMid-Market
Microsoft AdsEnterprise

Ad platforms and retargeting pixels

2

Categories

6

Total Tools

1

Enterprise

2

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

23 Resources

20
Scripts
3
Styles
18
Async
2
Defer

Top Script Sources

googletagmanager.com(4)bat.bing.com(3)connect.facebook.net(3)slso.org(2)youtube.com(1)

Website Identity

slso-admin

Person

Enjoy a season of exhilarating music by your St. Louis Symphony Orchestra at the grand reopening of Powell Hall. Explore the SLSO schedule!

info@slso.org
+13145341700
slso.org/author/slso-admin/
28 years old

St. Louis Symphony Orchestra718 N. Grand Blvd.St. Louis, MO 63103

Location detected: 🇺🇸 United Statesvia phone
Network Solutions, LLC📧 Microsoft 365en-US

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Last analyzed: 21 May 2026 at 14:37

Historical Analysis & Change Tracking