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

fiocruz.br

https://fiocruz.br· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

fiocruz.br

Mobile

Sponsored

Hosting Provider

Fundacao Instituto Oswaldo Cruz

IP Address

157.86.223.30

Server Location

🇧🇷 Rio de Janeiro, Brazil

ASN

AS21612

Organization

Fundacao Instituto Oswaldo Cruz

Server

Nginx

Nameservers

ns1.fiocruz.br.ns3.fiocruz.br.ns2.fiocruz.br.

Performance

Page Speed

2.5 MB

120 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

CMS

Drupal

Infrastructure

Hosting

Fundacao Instituto Oswaldo Cruz

Technology Stack

8 Technologies Detected

CSS Frameworks

Analytics

Libraries

UI Components

Web Servers

SEO Analysis

B70/100

fiocruz.brfiocruz.br

Fundação Oswaldo Cruz (Fiocruz)

Promover a saúde e o desenvolvimento social, gerar e difundir conhecimento científico e tecnológico, ser um agente da cidadania. Estes são os conceitos que p...

Description truncated.

Title Length31 chars

Recommended: 50-60 chars

Description Length323 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

27 URLs

robots.txt

52 rules

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

30d

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

17.12.2025

Valid Until

17.03.2026

Subject Alternative Names (2)

fiocruz.brwww.fiocruz.br

SHA-256 Fingerprint

36:5E:E9:BC:7B:27:46:62:C9:07:B3:0C:D8:44:E1:63:D7:67:80:F5...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 1 Hours(max-age=3600, public)

content-encoding

📦 Gzip(gzip)

content-language

pt-br

content-security-policy

frame-ancestors 'self' https://fiocruz360.icict.fiocruz.br

content-type

text/html; charset=UTF-8

date

Sun, 15 Feb 2026 04:06:37 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

fiocruz-br.mail.protection.outlook.com

Domain Information

fiocruz.br

Domain Age

30y 1m

Created

01.01.1996

Last Updated

10.07.2023

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Trebuchet MS

79/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

11/25

0.06x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Trebuchet MS

Sans1px

Body Font

Trebuchet MS

Sans16px

Contrast Ratio

Reading Comfort

~40 CPL

Needs attention

1px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

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

✅ Consistent design: Single font family with weight variations is a modern best practice.

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

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)googletagmanager.com(1)cdn.jsdelivr.net(1)

Website Identity

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 15 Feb 2026 at 06:45

Historical Analysis & Change Tracking