osa.org

https://osa.org· First analyzed 28 Apr 2026· Updated 28 Apr 2026

Export

osa.org

Mobile

Sponsored

Hosting Provider

The Optical Society

IP Address

38.95.177.43

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Washington, United States

ASN

AS174

Organization

The Optical Society

Server

Microsoft IIS

Nameservers

NS2.osa.org.yogi2.osa.org.yogi.osa.org.ns1.osa.org.

Performance

Core Web Vitals

Weight

First Contentful Paint

926 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

535 KB

98 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

CMS

Kentico

Infrastructure

Hosting

The Optical Society

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel

Icon Libraries

Font Awesome Material Icons

Libraries

Other

CSS Frameworks

Fonts

Tag Managers

Advertising

Web Servers

Frameworks

SEO Analysis

C61/100

Meta Tags9/15

Content11/12

Headings3/8

Technical17/25

E-E-A-T2/7

Images3/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

osa.orgosa.org

Home | Optica

Optica is the leading society in optics and photonics. Quality information and inspiring interactions through publications, meetings, and membership.

Title Length13 chars

Recommended: 50-60 chars (~81px / 580px)

Description Length149 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

11,832 URLs

robots.txt

Local SEO

Local Search Readiness

20/100

Needs Work

5 12

Sponsored

AI & LLM Readiness

D52/100

Bot Access

20/25

Machine Read.

15/25

Schema Data

7/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:7%

Words:2,091

Token eff.:Optimal

Sections/1K:7.2

Depth:1/5

Structured Data

2 JSON-LD

Organization×1.1WebSiteSearchAction

sameAs entity links

Citation Readiness

Opening Summary607w

Descriptive Headingsavg 7.1w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

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.

72/100

Passed

Critical

Warnings

Images & Alt Text

15/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

5/15

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

9/15

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

3 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

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.

49/100

66 mg

CO₂e / view

535.2 KB

Page Weight

80%

Cleaner Than

New Visitor

76 mg

Returning (cached)

38 mg

Annual (10K/mo)

7.9 kg

Emission Segments

Data Center

15 mg

Network

16 mg

Device

36 mg

Resource Breakdown

JavaScript

396.8 KB

Images

30.9 KB

CSS

83.9 KB

Fonts

1.7 KB

HTML

21.8 KB

Green Hosting Not Verified

The Optical Society

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

71%Good

Interactive

HTTPS

No WAF

78d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

08.07.2025

Valid Until

15.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

www.optica.orgoptica.orgwww.osa.org

SHA-256 Fingerprint

AB:E7:63:5E:DD:FD:FE:84:7B:B6:D5:77:88:07:0D:81:81:26:BA:7A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self' *.materialdesignicons.com *.azurefd.net *...

content-type

text/html; charset=utf-8

date

Tue, 28 Apr 2026 04:18:14 GMT

referrer-policy

same-origin

request-context

appId=cid-v1:ecfa220b-0954-4307-8331-c59b021d2cce

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

smtpin1.osa.org

Domain Information

osa.org

Domain Age

33y 4m

Created

04.01.1993

Expires

03.01.2027

Last Updated

23.10.2023

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

81/100

Mobile Friendly24 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=1.0,shrink-to-fit=no

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Archivo + Karla

WCAG Partial

61/100

Readability

/30

21/30

14px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

15/25

2 fonts · 2 req

Heading Font

Archivo

Sans

Body Font

Karla

Sans14px

Contrast Ratio

1:1

5 issues

Reading Comfort

~39 CPL

Narrow lines

49px

20px

24px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 29/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

GGoogle FontsFluid Type (rem)Flesch 29

Color Palette

8 unique colors

18.76:1 AAA Light

#f2f2f2

Background· 34.60000000000001%

#000000

Text· 14.4%

#771bc9

Primary· 0%

#cbd4da

Secondary· 10.1%

#a19aba

Secondary· 9%

#545065

Secondary· 5.5%

#0f0c15

Secondary· 4.1%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)googletagmanager.com(4)connect.facebook.net(2)ssl.google-analytics.com(1)snap.licdn.com(1)

Website Identity

Optica

Organization

www.optica.org

33 years old

Location detected: 🇺🇸 United Statesvia ip

Network Solutions, LLCen

Social Profiles

Facebook

Sponsored

Last analyzed: 28 Apr 2026 at 04:18

Historical Analysis & Change Tracking