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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123formbuilder.com

https://123formbuilder.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

123formbuilder.com

Sponsored

Hosting Provider

Hetzner

hetzner.com

IP Address

148.251.232.158

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Organization

Hetzner

Server

Nginx

Nameservers

ns-102.awsdns-12.com.ns-1392.awsdns-46.org.ns-1761.awsdns-28.co.uk.ns-854.awsdns-42.net.

Performance

Page Speed

713 KB

76 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

CMS

WordPressv6.9

Infrastructure

Hosting

Hetzner

Technology Stack

21 Technologies Detected

Plugins

Wp Data Access

Autoptimize

Duracelltomi Google Tag Manager

Analytics

Libraries

Advertising

LinkedIn Ads Microsoft Advertising

Frameworks

Other

Other

CSS Frameworks

Tag Managers

Other

Reviews

Web Servers

SEO Analysis

A+100/100

123formbuilder.com123formbuilder.com

Free Online Form Builder | Form Creator | 123FormBuilder

Build secure online forms as easy as 1-2-3 with our form builder tool. Create application forms, order forms, quizzes and surveys. ✅ No Coding ✅ FREE Sign Up

Title Length56 chars

Recommended: 50-60 chars

Description Length157 chars

Recommended: 120-160 chars

Sponsored

Security Score

78%Good

Static / Informational

HTTPS

No WAF

80d

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/2

Valid From

07.02.2026

Valid Until

08.05.2026

Subject Alternative Names (7)

123formbuilder.comblog.123formbuilder.comcdn.marketing123.123formbuilder.comdeveloper.123formbuilder.comeu.123formbuilder.commarketing123.123formbuilder.comwww.123formbuilder.com

SHA-256 Fingerprint

E3:0B:4B:7E:28:C7:14:AF:CF:9B:60:47:5A:5C:68:9F:79:AA:BB:D3...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Mon, 16 Feb 2026 22:47:10 GMT

last-modified

Mon, 16 Feb 2026 22:24:05 GMT

link

<https://www.123formbuilder.com/wp-json/>; rel="https://api....

referrer-policy

no-referrer-when-downgrade

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

123formbuilder-com.mail.protection.outlook.com

Domain Information

123formbuilder.com

Domain Age

13 years

Created

21.01.2013

Expires

21.01.2027

Last Updated

17.12.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Inter

61/100

Readability

/30

32/40

38px · LH 1.20

Hierarchy

/20

8/25

1.47x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Inter

Sans56px

Body Font

Inter

Sans38px

Contrast Ratio

Reading Comfort

~33 CPL

Needs attention

56px

36px

48px

32px

38px

✅ Excellent readability: 38px body text is ideal for all devices.

⚠️ 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.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 27 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

7 Tools Detected

Enterprise

Behavior Analytics

HotjarMid-Market

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

LinkedIn AdsEnterprise

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.marketing123.123formbuilder.com(9)googletagmanager.com(3)123formbuilder.com(2)scripts.clarity.ms(1)clarity.ms(1)

Website Identity

123formbuilder.com

13 years old

Amazon Registrar, Inc.📧 Microsoft 365

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube Pinterest

Sponsored

Last analyzed: 16 Feb 2026 at 22:47

Historical Analysis & Change Tracking