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

u.to

https://u.to· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

u.to

Mobile

Sponsored

Hosting Provider

Iqweb LLC

IP Address

186.2.165.57

Server Location

🇦🇪 Abu Dhabi, United Arab Emirates

ASN

AS59692

Organization

Iqweb LLC

Server

ddos-guard

Nameservers

ns2.ucoz.net.ns3.ucoz.net.

Performance

Page Speed

890 KB

39 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Nuxt.js

Infrastructure

Hosting

Iqweb LLC

Technology Stack

2 Technologies Detected

Meta Frameworks

Nuxt.js

CSS Frameworks

Tailwind CSS

SEO Analysis

F35/100

u.tou.to

u.to — URL Shortening Service

Shortening of long links. Complete statistics of clicks. Search Engine Friendly URLs.

Title Length29 chars

Recommended: 50-60 chars

Description Length85 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (1/1)

7 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

3 rules

Allows all crawlers

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

286d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoGetSSL

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.10.2025

Valid Until

26.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

u.towww.u.to

SHA-256 Fingerprint

36:AA:FB:5D:E1:74:92:A0:04:AF:56:FC:9D:5A:3A:C1:8F:EC:CB:F8...

Top 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

date

Fri, 13 Feb 2026 23:25:19 GMT

etag

W/"6985b1ea-8cb"

last-modified

Fri, 06 Feb 2026 09:18:34 GMT

server

ddos-guard

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx100.ucozmail.com

Domain Information

u.to

Domain Age

4y 2m

Created

18.11.2021

Expires

18.11.2026

Last Updated

25.06.2025

Registrar

Government of Kingdom of Tonga

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Inter + Sofia Sans:ExtraBold

78/100

Readability

/30

40/40

24px · LH 1.67

Hierarchy

/20

18/25

2.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Inter

Sans56px

Body Font

Sofia Sans:ExtraBold

Sans24px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

56px

24px

✅ Excellent readability: 24px body text is ideal for all devices.

✅ Optimal line spacing: 1.67 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.3x larger than body text.

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

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

mc.yandex.ru(1)local(1)

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Last analyzed: 13 Feb 2026 at 23:25

Historical Analysis & Change Tracking