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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archive.is

https://archive.is· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

archive.is

Mobile

Sponsored

Hosting Provider

anyNode

IP Address

104.36.80.107

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS40663

Organization

anyNode

Server

Nginx

Nameservers

elsa.archive.li.sara.archive.md.carl.archive.is.dave.archive.ph.

Performance

Page Speed

39 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

anyNode

Technology Stack

2 Technologies Detected

Web Servers

Nginx

Security

reCAPTCHA

SEO Analysis

F35/100

archive.isarchive.is

archive.is

No description available for this page.

Title Length10 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

5,000 URLs

robots.txt

19 rules

Sitemap reference found

Sponsored

Security Score

26%Critical

Interactive

HTTPS

No WAF

63d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

16.01.2026

Valid Until

16.04.2026

Subject Alternative Names (2)

*.archive.isarchive.is

SHA-256 Fingerprint

4E:86:01:71:23:CA:4B:BD:0B:F0:FC:59:D5:36:DF:5E:61:4F:76:77...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

content-length

55721

content-type

text/html

date

Thu, 12 Feb 2026 11:51:47 GMT

referrer-policy

no-referrer

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mail.tutanota.de

Domain Information

archive.is

Domain Age

13y 9m

Created

16.05.2012

Last Updated

12.04.2025

DNSSEC

Not Enabled

Typography & Readability

Open Sans + Times New Roman

73/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

18/25

3.75x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Open Sans

Sans60px

Body Font

Times New Roman

Serif16px

Contrast Ratio

Reading Comfort

Sans Headlines + Serif Body

left aligned

60px

30px

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

✅ Strong hierarchy: Headlines are 3.8x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

gstatic.com(1)google.com(1)

Sponsored

Last analyzed: 12 Feb 2026 at 11:52

Historical Analysis & Change Tracking