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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bytedance.com

https://bytedance.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

bytedance.com

Mobile

Sponsored

Hosting Provider

BeiJing Teamsun Technology Co.

IP Address

122.14.229.102

Server Location

🇨🇳 Beijing, China

ASN

AS9808

Organization

BeiJing Teamsun Technology Co.

Server

TLB

Nameservers

vip3.alidns.com.vip4.alidns.com.

Performance

Page Speed

17.8 MB

39 requests

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Infrastructure

Hosting

BeiJing Teamsun Technology Co.

Technology Stack

2 Technologies Detected

Meta Frameworks

Next.js

CSS Frameworks

Tailwind CSS

SEO Analysis

D56/100

bytedance.combytedance.com

ByteDance - Inspire Creativity, Enrich Life

ByteDance is a technology company operating a range of content platforms that inform, educate, entertain and inspire people across languages, cultures and ge...

Description truncated.

Title Length43 chars

Recommended: 50-60 chars

Description Length167 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (25/48)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

3 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Sponsored

A+

Security Score

91%Excellent

Static / Informational

HTTPS

No WAF

28d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

17.03.2025

Valid Until

17.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.bytedance.combytedance.com

SHA-256 Fingerprint

8A:0D:34:4A:00:2D:91:82:EE:03:E0:6C:03:A4:E0:5E:A7:78:D2:4A...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store)

connection

keep-alive, Transfer-Encoding

content-encoding

📦 Gzip(gzip)

content-security-policy-report-only

default-src 'self' data: blob: *.tiktokcdn.com *.pstatp.com ...

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 14:09:23 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

mx2.bytedance.com

mx3.bytedance.com

mx1.bytedance.com

Domain Information

bytedance.com

Domain Age

14y 3m

Created

16.11.2011

Expires

16.11.2026

Last Updated

18.05.2022

Registrar

eName Technology Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Times New Roman

83/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

32px

16px

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

✅ Strong hierarchy: Headlines are 2.0x 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.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

sf16-scmcdn-sg.ibytedtos.com(15)

Sponsored

Last analyzed: 17 Feb 2026 at 14:09

Historical Analysis & Change Tracking