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

planalto.gov.br

https://planalto.gov.br· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

planalto.gov.br

Mobile

Sponsored

Hosting Provider

PRESIDÊNCIA DA REPÚBLICA

IP Address

170.246.255.9

Server Location

🇧🇷 Brasília, Brazil

ASN

AS266031

Organization

PRESIDÊNCIA DA REPÚBLICA

Nameservers

alpha2.planalto.gov.br.alpha.planalto.gov.br.

Performance

Page Speed

3.1 MB

79 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

PRESIDÊNCIA DA REPÚBLICA

Technology Stack

11 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Matomo

Meta Frameworks

Libraries

UI Components

CSS Frameworks

Icon Libraries

Tag Managers

Advertising

SEO Analysis

B72/100

planalto.gov.brplanalto.gov.br

Página Inicial — Planalto

No description available for this page.

Title Length25 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

3 issues found

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Crawlability

Sitemap

robots.txt

58 rules

Sitemap reference found

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Security Score

21%Critical

Interactive

HTTPS

No WAF

150d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

11.06.2025

Valid Until

13.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

gov.brwww.gov.br

SHA-256 Fingerprint

44:8E:73:8A:69:3A:4D:2D:91:9B:AB:9C:78:B9:DB:8B:12:3E:93:32...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

accept-ranges

bytes

content-length

1783

content-type

text/html

date

Thu, 12 Feb 2026 22:53:22 GMT

etag

"954bdb5de547d51:0"

last-modified

Wed, 31 Jul 2019 21:17:32 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

esa02.presidencia.gov.br

esa01.presidencia.gov.br

Domain Information

planalto.gov.br

Domain Age

29y 10m

Created

16.04.1996

Last Updated

25.03.2021

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

rawline

63/100

Readability

/30

22/40

14px · LH --

Hierarchy

/20

18/25

2.57x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

rawline

Sans36px

Body Font

rawline

Sans14px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

36px

20px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

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

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 9 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

gov.br(17)cdnjs.cloudflare.com(1)barra.sistema.gov.br(1)local(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok

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Last analyzed: 12 Feb 2026 at 22:54

Historical Analysis & Change Tracking