tu-sofia.bg

https://tu-sofia.bg· First analyzed 04 May 2026· Updated 04 May 2026

Export

tu-sofia.bg

Mobile

Sponsored

Hosting Provider

Technical University of Sofia

IP Address

81.161.240.3

Site Location

🇧🇬 Bulgariavia tld

Server Location

🇧🇬 Sofia, Bulgaria

ASN

AS28949

Organization

Technical University of Sofia

Server

Apache

Nameservers

purgatory.spnet.net.ns.spnet.net.enterprise.tu-sofia.bg.ns.tu-sofia.bg.

Performance

Core Web Vitals

Weight

First Contentful Paint

732 ms10%

Speed Index

952 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.4 MB

83 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Technical University of Sofia

Technology Stack

8 Technologies Detected

Analytics

Google Analytics

Facebook Pixel Segment

Libraries

UI Components

CSS Frameworks

Web Servers

SEO Analysis

D55/100

Meta Tags4/15

Content12/12

Headings6/8

Technical14/25

E-E-A-T3/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

tu-sofia.bgtu-sofia.bg

ТУ - София

No description available for this page.

Title Length10 chars

Recommended: 50-60 chars (~62px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

12 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

24 rules

Local SEO

Local Search Readiness

11/100

Poor

3 12 2

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

Sponsored

AI & LLM Readiness

F32/100

Bot Access

20/25

Machine Read.

2/25

Schema Data

0/25

Citation

10/25

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:18%

Words:6,485

Token eff.:Excessive

Sections/1K:0.2

Structured Data

No Schema

Citation Readiness

Opening Summary27w

Descriptive Headingsavg 11w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

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.

66/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

9/20

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

3/15

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

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

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.

10/100

432 mg

CO₂e / view

3.4 MB

Page Weight

15%

Cleaner Than

New Visitor

494 mg

Returning (cached)

247 mg

Annual (10K/mo)

51.8 kg

Emission Segments

Data Center

96 mg

Network

104 mg

Device

232 mg

Resource Breakdown

JavaScript

280.1 KB

Images

2.5 MB

CSS

623.7 KB

HTML

31.8 KB

Green Hosting Not Verified

Technical University of Sofia

6 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

21%Critical

Interactive

HTTPS

No WAF

59d

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/1.1

Valid From

03.04.2026

Valid Until

02.07.2026

Subject Alternative Names (20)

career-alumni.tu-sofia.bgcrk.tu-sofia.bgcvp.tu-sofia.bgects.tu-sofia.bginnoeut.tu-sofia.bgkis.tu-sofia.bgks.tu-sofia.bglibrary.tu-sofia.bg+12 more

SHA-256 Fingerprint

3B:0F:CC:85:53:A4:6D:A0:5F:00:3F:5D:54:91:75:82:F3:5C:75:7B...

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)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

32241

content-type

text/html; charset=UTF-8

date

Mon, 04 May 2026 10:51:19 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

mgate2.tu-sofia.bg

mx17.mtel.net

mgate.tu-sofia.bg

Domain Information

tu-sofia.bg

DNSSEC

Not Enabled

Privacy & Compliance

CookieInfo Script

Cookie Consent Banner

CookieInfo Script

GDPR Indicators

Cookie consent banner detected

CMP: CookieInfo Script

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.

48/100

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.

Viewport

width=device-width, initial-scale=1, maximum-scale=1.0, user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Verdana

WCAG AA

58/100

Readability

/30

10/30

11px · LH --

Hierarchy

/20

13/20

1.09x ratio

WCAG

/25

21/25

5.74:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Verdana

Sans12px

Body Font

Verdana

Sans11px

Contrast Ratio

5.74:1

WCAG AA (≥4.5:1)

Reading Comfort

~54 CPL

Optimal (45–75)

12px

16px

11px

Perfect Fourth

Scale

❌ Critical: 11px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line length: ~54 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 18/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.7:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

Buy on MyFontsFlesch 18

Color Palette

8 unique colors

8.38:1 AAA Light

#f3f3f3

Background· 51.2%

#4a4647

Text· 8%

#a2bec9

Primary· 5.8%

#181c23

Secondary· 5.8%

#2d7c9b

Accent· 5.4%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)connect.facebook.net(2)google-analytics.com(2)googletagmanager.com(1)

Website Identity

tu-sofia.bg

Location detected: 🇧🇬 Bulgariavia tld

Social Profiles

Facebook YouTube

Sponsored

Last analyzed: 04 May 2026 at 10:51

Historical Analysis & Change Tracking