What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

nsvrc.org

https://nsvrc.org· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

nsvrc.org

Mobile

Sponsored

Hosting Provider

Pantheon

cloudflare.com

IP Address

104.26.10.148

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

mallory.ns.cloudflare.com.remy.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

691 ms10%

Speed Index

898 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.5 MB

76 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

Charitiv1.3.3Custom

by Goodlayers

View Theme

Technology Stack

17 Technologies Detected

Plugins

Contact Form 7

Goodlayers Core Revslider Ymc Smart Filter Master Slider Gtranslate

Libraries

Analytics

Other

CSS Frameworks

Icon Libraries

Fonts

CDN

Security

SEO Analysis

B78/100

Meta Tags10/15

Content10/12

Headings3/8

Technical25/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social3/5

Freshness4/4

Mobile4/4

Indexability3/3

nsvrc.orgnsvrc.org

Homepage - National Sexual Violence Resource Center (NSVRC)

No description available for this page.

Title Length59 chars

Recommended: 50-60 chars (~357px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

30 URLs

30 sub-sitemaps

robots.txt

25 rules

Sitemap reference found

Local SEO

Local Search Readiness

22/100

Needs Work

6 12

Sponsored

AI & LLM Readiness

D44/100

Bot Access

15/25

Machine Read.

7/25

Schema Data

8/25

Citation

14/25

AI Bot Access

6/14 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:4%

Words:1,217

Token eff.:Optimal

Structured Data

4 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary13w

Descriptive Headingsavg 3.2w

Canonical URL

Open Graph1/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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

20/20

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

Semantic Structure

11/20

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

9/15

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.

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.

55/100

254 mg

CO₂e / view

2.5 MB

Page Weight

30%

Cleaner Than

New Visitor

290 mg

Returning (cached)

145 mg

Annual (10K/mo)

30.5 kg

Emission Segments

Data Center

12 mg

Network

75 mg

Device

167 mg

Resource Breakdown

JavaScript

526.2 KB

Images

1.2 MB

CSS

687.4 KB

Fonts

1.0 KB

HTML

48.8 KB

Green Hosting Verified

Cloudflare

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

WAF

43d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.03.2026

Valid Until

07.06.2026

Subject Alternative Names (2)

*.nsvrc.orgnsvrc.org

SHA-256 Fingerprint

7A:AA:7C:05:AE:F7:D5:01:9D:FD:6D:D6:E6:25:13:55:89:D6:A7:5D...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

78557

cache-control

🔵 1 Week(public, max-age=604800)

cf-cache-status

DYNAMIC

cf-ray🇮🇹 Milan

9f1e2c07ce1aed58-MXP

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Barracuda

Score

SPF

DKIM

DMARC

MX Records (2)

d256240b.ess.barracudanetworks.com

d256240a.ess.barracudanetworks.com

Domain Information

nsvrc.org

Domain Age

26y 6m

Created

05.10.1999

Expires

05.10.2026

Last Updated

09.03.2026

Registrar

DreamHost, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

79/100

Mobile Friendly4 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...

Upgrade to view recommendations

Typography & Readability

Gotham

WCAG Partial

60/100

Readability

/30

19/30

15px · LH 1.70

Hierarchy

/20

7/20

WCAG

/25

18/25

1:1 min contrast

Performance

/25

16/25

1 font · 6 req

Heading Font

Gotham

Sans

Body Font

Gotham

Sans15px

Contrast Ratio

1:1

22 issues

Reading Comfort

~36 CPL

Narrow lines

15px

38px

15px

Major Sixth

Scale

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

❌ Very complex text: Flesch score 21/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 22 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).

✅ Lean font stack: 1 font families keeps load times fast.

GGoogle Fonts Buy on MyFontsFluid Type (rem)Flesch 21

Color Palette

9 unique colors

8.26:1 AAA Light

#ffffff

Background· 62.300000000000004%

#524d52

Text· 5.4%

#008c99

Primary· 15.1%

#9ab08d

Secondary· 3.7%

#cddfd8

Secondary· 2.9%

#03a4ae

Accent· 2.8%

#16566e

Accent· 2.3%

#30818c

Secondary· 1.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

nsvrc.org(17)gstatic.com(1)googletagmanager.com(1)google.com(1)

Website Identity

National Sexual Violence Resource Center (NSVRC)

Organization

National Sexual Violence Resource Center

nsvrc.org/

26 years old

Location detected: 🇨🇦 Canadavia ip

DreamHost, LLC📧 Barracudaen-US

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 25 Apr 2026 at 14:52

Historical Analysis & Change Tracking