opera-lyon.com

https://opera-lyon.com· First analyzed 07 May 2026· Updated 07 May 2026

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opera-lyon.com

Mobile

Sponsored

Hosting Provider

Outscale SASU

IP Address

148.253.117.53

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Saint-Cloud, France

ASN

AS50624

Organization

Outscale SASU

Server

Nginx

CDN

Varnish

Nameservers

ns76.site-internet.com.ns77.site-internet.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

309 ms10%

Speed Index

402 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

601 KB

43 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Nuxt.js

Infrastructure

Hosting

Outscale SASU

CDN

Varnish

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

9 Technologies Detected

Analytics

Meta Frameworks

Other

CSS Frameworks

Tag Managers

Advertising

Web Servers

Security

SEO Analysis

D56/100

Meta Tags7/15

Content6/12

Headings5/8

Technical16/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social2/5

Freshness0/4

Mobile3/4

Indexability3/3

opera-lyon.comopera-lyon.com

Opéra National de Lyon

Découvrez la programmation de l’Opéra de Lyon et réservez vos billets !

Title Length22 chars

Recommended: 50-60 chars (~134px / 580px)

Description Length71 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (24/29) — critical for accessibility and SEO

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

2 sub-sitemaps

robots.txt

7 rules

Sitemap reference found

Local SEO

Local Search Readiness

15/100

Poor

4 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F36/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

9/25

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:2%

Words:961

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary110w

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

82/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

10/15

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

7/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

1 recommendation

•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.

61/100

74 mg

CO₂e / view

601.3 KB

Page Weight

80%

Cleaner Than

New Visitor

85 mg

Returning (cached)

43 mg

Annual (10K/mo)

8.9 kg

Emission Segments

Data Center

17 mg

Network

18 mg

Device

40 mg

Resource Breakdown

JavaScript

493.0 KB

Images

905 B

CSS

39.6 KB

HTML

57.6 KB

Other

10.3 KB

Green Hosting Not Verified

Outscale SASU

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

31%Critical

Interactive

HTTPS

No WAF

88d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

05.05.2026

Valid Until

03.08.2026

Subject Alternative Names (6)

opera-lyon.comopera-lyon.fropera-underground.comwww.opera-lyon.comwww.opera-lyon.frwww.opera-underground.com

SHA-256 Fingerprint

98:8D:30:4D:76:31:88:F4:32:96:88:C4:DB:F1:61:90:BF:0F:0D:2A...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

alt-svc

h3=":443"; ma=2592000

cache-control

⚪ Custom(s-maxage=30, stale-while-revalidate=3600)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Thu, 07 May 2026 08:54:05 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx21b.mailinblack.com

mx21.mailinblack.com

Domain Information

opera-lyon.com

Domain Age

28y 1m

Created

18.03.1998

Expires

17.03.2027

Last Updated

14.02.2026

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

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.

85/100

Mobile Friendly465 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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

basetica

WCAG Partial

72/100

Readability

/30

18/30

32px · LH 1.19

Hierarchy

/20

16/20

5.25x ratio

WCAG

/25

18/25

1:1 min contrast

Performance

/25

20/25

1 font · 2 req

Heading Font

basetica

Sans168px

Body Font

basetica

Sans32px

Contrast Ratio

1:1

4 issues

Reading Comfort

~38 CPL

Narrow lines

168px

24px

16px

32px

✅ Excellent readability: 32px body text is ideal for all devices.

⚠️ Tight line spacing (1.19). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 46/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 5.2x larger than body text.

Buy on MyFontsFluid Type (rem)Flesch 46

Color Palette

9 unique colors

20.2:1 AAA Dark

#050506

Text· 30.300000000000004%

#fefefe

Text· 7.9%

#967f68

Primary· 6.4%

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)cdn.jsdelivr.net(3)googletagmanager.com(1)cdn.matomo.cloud(1)

Website Identity

opera-lyon.com

28 years old

Location detected: 🇫🇷 Francevia ip

Gandi SASfr

Social Profiles

Facebook Instagram LinkedIn YouTube

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Last analyzed: 07 May 2026 at 08:54

Historical Analysis & Change Tracking