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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zamzar.com

https://zamzar.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

zamzar.com

Sponsored

Hosting Provider

IBM Cloud (SoftLayer)

ibm.com/cloud

IP Address

169.48.170.78

Server Location

🇺🇸 Dallas, United States

ASN

AS36351

Organization

SoftLayer Technologies, Inc

Server

Apache

Nameservers

ns13.dnsmadeeasy.com.ns14.dnsmadeeasy.com.ns15.dnsmadeeasy.com.ns11.dnsmadeeasy.com.+2 more

Performance

Page Speed

131 KB

19 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

IBM Cloud (SoftLayer)

Technology Stack

6 Technologies Detected

Analytics

CSS Frameworks

Email Marketing

Web Servers

SEO Analysis

B70/100

zamzar.comzamzar.com

Zamzar - video converter, audio converter, image converter, eBook c...

Free online video converter, audio converter, image converter, eBook converter. No download or account required.

Title truncated.

Title Length75 chars

Recommended: 50-60 chars

Description Length112 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

5 URLs

robots.txt

12 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

252d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

28.09.2025

Valid Until

30.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.zamzar.comzamzar.com

SHA-256 Fingerprint

FC:C8:F6:AD:8C:5B:11:7E:59:25:24:2B:99:63:2A:7A:91:85:61:DB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

40180

content-type

text/html; charset=UTF-8

date

Thu, 19 Feb 2026 14:12:01 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

zamzar.com

Domain Age

20 years

Created

29.01.2006

Expires

29.01.2027

Last Updated

30.01.2026

Registrar

IONOS SE

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

-apple-system + Helvetica Neue Light

71/100

Readability

/30

25/40

17px · LH 1.00

Hierarchy

/20

18/25

3.29x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

-apple-system

Sans56px

Body Font

Helvetica Neue Light

Sans17px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

56px

16px

28px

16px

17px

✅ Excellent readability: 17px body text is ideal for all devices.

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 3.3x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 18 elements lack adequate spacing.

Business & Marketing Stack

5 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

PlausibleSMB

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

A/B Testing & Optimization

ConvertMid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)plausible.io(1)googletagmanager.com(1)cdnjs.cloudflare.com(1)

Website Identity

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 19 Feb 2026 at 14:12

Historical Analysis & Change Tracking