tjhsst.edu

https://tjhsst.edu· First analyzed 21 May 2026· Updated 21 May 2026

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tjhsst.edu

Mobile

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Hosting Provider

Thomas Jefferson High School Science and Technology

IP Address

198.38.18.202

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Alexandria, United States

ASN

AS3140

Organization

Thomas Jefferson High School Science and Technology

Server

Nginx

Nameservers

ns.uu.net.ipa1.tjhsst.edu.ns2.tjhsst.edu.ns1.tjhsst.edu.+1 more

Performance

100

Core Web Vitals

Weight

First Contentful Paint

297 ms10%

Speed Index

386 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

6 KB

6 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Thomas Jefferson High School Science and Technology

Technology Stack

4 Technologies Detected

Analytics

Fonts

Web Servers

SEO Analysis

F37/100

Meta Tags9/15

Content3/12

Headings6/8

Technical8/21

E-E-A-T0/7

Images0/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

tjhsst.edutjhsst.edu

TJHSST - Thomas Jefferson High School for Science and Technology

No description available for this page.

Title Length64 chars

Recommended: 50-60 chars (~390px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

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Local SEO

Local Search Readiness

3/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F29/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

Citation

5/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:6%

Words:52

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary30w

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

74/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

14/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

1 recommendation

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

58/100

A+

<0.001 g

CO₂e / view

5.9 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

84 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

Fonts

2.1 KB

HTML

3.8 KB

Green Hosting Not Verified

Thomas Jefferson High School Science and Technology

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

76%Good

Static / Informational

HTTPS

No WAF

72d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

04.05.2026

Valid Until

02.08.2026

Subject Alternative Names (2)

*.tjhsst.edutjhsst.edu

SHA-256 Fingerprint

64:48:92:E8:01:82:A1:41:55:22:4A:7C:8E:9E:F2:2C:EF:48:FD:5C...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Thu, 21 May 2026 01:00:21 GMT

etag

W/"67fdbd53-1514"

last-modified

Tue, 15 Apr 2025 01:58:43 GMT

public-key-pins

max-age=0

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

mail.tjhsst.edu

Domain Information

tjhsst.edu

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

39/100

Not Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica Neue

WCAG AA

73/100

Readability

/30

18/30

13px · LH 1.40

Hierarchy

/20

14/20

1.92x ratio · ✓ H1→H6

WCAG

/25

22/25

6.19:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Helvetica Neue

Sans25px

Body Font

Helvetica Neue

Sans13px

Contrast Ratio

6.19:1

WCAG AA (≥4.5:1)

Reading Comfort

~57 CPL

Optimal (45–75)

25px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~57 chars/line (ideal 45–75 CPL).

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.2:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle FontsFlesch 57

Color Palette

6 unique colors

5.57:1 AA Light

#f2f2f4

Secondary· 97.39999999999998%

#616065

Other· 0.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)google-analytics.com(1)

Website Identity

tjhsst.edu

Location detected: 🇺🇸 United Statesvia ip

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Last analyzed: 21 May 2026 at 01:01

Historical Analysis & Change Tracking