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.

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nsidc.org

https://nsidc.org· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

nsidc.org

Sponsored

Hosting Provider

University of Colorado

IP Address

128.138.135.43

Server Location

🇺🇸 Lafayette, United States

ASN

AS104

Organization

University of Colorado

Server

Apache

Nameservers

ns1.p201.dns.oraclecloud.net.ns2.p201.dns.oraclecloud.net.ns3.p201.dns.oraclecloud.net.ns4.p201.dns.oraclecloud.net.

Performance

Page Speed

901 KB

64 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

CMS

Drupal

Infrastructure

Hosting

University of Colorado

Technology Stack

10 Technologies Detected

Analytics

CSS Frameworks

Libraries

Icon Libraries

Fonts

Tag Managers

Web Servers

SEO Analysis

C64/100

nsidc.orgnsidc.org

Homepage | National Snow and Ice Data Center

No description available for this page.

Title Length44 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

8,340 URLs

robots.txt

58 rules

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

54d

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

13.01.2026

Valid Until

13.04.2026

Subject Alternative Names (17)

eloka.nsidc.orgextranet.nsidc.orgigloo.nsidc.orginside.nsidc.orgintegration.eloka.nsidc.orgintegration.inside.nsidc.orgintegration.nsidc.orgk2.colorado.edu+9 more

SHA-256 Fingerprint

8E:C7:7F:1D:A0:2A:6B:E5:4D:00:D9:39:B5:08:D1:23:1F:90:31:FC...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 900s(max-age=900, public)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-security-policy-report-only

report-uri /report-csp-violation

content-type

text/html; charset=UTF-8

content-language

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx1-us1.ppe-hosted.com

mx2-us1.ppe-hosted.com

Domain Information

nsidc.org

Domain Age

25y 12m

Created

25.02.2000

Expires

25.02.2028

Last Updated

12.07.2023

Registrar

Name106, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Roboto

76/100

Readability

/30

32/40

16px · LH 1.88

Hierarchy

/20

21/25

2.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Roboto

Sans40px

Body Font

Roboto

Sans16px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

40px

35px

20px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 23 elements lack adequate spacing.

GGoogle Fonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Customer Support

ZendeskEnterprise

Live chat and helpdesk tools

Behavior Analytics

HotjarMid-Market

Google Tag ManagerFree

Google AnalyticsFree

PlausibleSMB

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(7)local(4)dap.digitalgov.gov(4)static.addtoany.com(3)static.hotjar.com(1)

Website Identity

Facebook X (Twitter)YouTube

Sponsored

Last analyzed: 17 Feb 2026 at 19:59

Historical Analysis & Change Tracking