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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depositfiles.com

https://depositfiles.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

depositfiles.com

Mobile

Sponsored

Hosting Provider

Sebastano Perero s.r.o

IP Address

91.226.124.104

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS35415

Organization

Sebastano Perero s.r.o

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

evangeline.ns.cloudflare.com.hayes.ns.cloudflare.com.

Performance

Page Speed

14 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Sebastano Perero s.r.o

CDN

Cloudflare

Technology Stack

8 Technologies Detected

Analytics

Libraries

Tag Managers

Web Servers

CDN

Customer Support

Security

SEO Analysis

D41/100

depositfiles.comdepositfiles.com

dfiles.com

DepositFiles provides you with a legitimate technical solution, which enables you to upload, store, access and download text, software, scripts, images, so...

Description truncated.

Title Length10 chars

Recommended: 50-60 chars

Description Length249 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Missing viewport meta tag - page may not be mobile-friendly

7 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Sponsored

Security Score

51%Poor

Interactive

HTTPS

No WAF

61d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

17.01.2026

Valid Until

17.04.2026

Subject Alternative Names (2)

*.dfiles.comdfiles.com

SHA-256 Fingerprint

D3:34:18:A7:BF:55:8A:0A:4F:ED:79:D4:29:2E:77:0C:8A:FD:D1:57...

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-security-policy

frame-ancestors depositfiles.com *.depositfiles.com depositf...

content-type

text/html; charset=UTF-8

date

Sun, 15 Feb 2026 01:35:09 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx.depositfiles.com

Domain Information

depositfiles.com

Domain Age

20y 3m

Created

05.11.2005

Expires

05.11.2026

Last Updated

30.10.2025

Registrar

EuroDNS S.A.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Tahoma

43/100

Readability

/30

32/40

18px · LH 2.00

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Tahoma

Sans

Body Font

Tahoma

Sans18px

Contrast Ratio

Reading Comfort

~48 CPL

Optimal (45–75)

30px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

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

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

⚠️ Risky: Text appears on background images without overlay protection.

✅ Optimal line length: ~48 characters per line is comfortable to read.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.depositfiles.com(4)googletagmanager.com(2)cdn.cookie-script.com(1)challenges.cloudflare.com(1)

Sponsored

Last analyzed: 15 Feb 2026 at 01:35

Historical Analysis & Change Tracking