StackOptic
Back to Search
undertale.com favicon

undertale.com

https://undertale.com· First analyzed 07 May 2026· Updated 07 May 2026
Export
undertale.com
Desktop screenshot of undertale.com
Mobile screenshot of undertale.com
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

172.67.144.83

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

jean.ns.cloudflare.com.jeff.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
390 ms10%
Speed Index
507 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.1 MB
46 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

CDN

1
Cloudflare

SEO Analysis

C62/100
17
6
1
Meta Tags10/15
Content8/12
Headings3/8
Technical13/21
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
U
undertale.comundertale.com

UNDERTALE for Nintendo Switch, PC / Mac, PlayStation, and Xbox

UNDERTALE! The RPG game where you don't have to destroy anyone.

Title Length62 chars

Recommended: 50-60 chars (~374px / 580px)

Description Length63 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

7 issues found

Upgrade to view details

Local SEO

Local Search Readiness

6/100
Poor
2 13 2

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

Sponsored

AI & LLM Readiness

D40/100
Bot Access
20/25
Machine Read.
5/25
Schema Data
0/25
Citation
15/25

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
nav
Text ratio:5%
Words:243
Token eff.:Too Short
Sections/1K:12.3
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary11w
Descriptive Headingsavg 3.7w
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
B
77/100
11
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
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.
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.
51/100
E
318 mg
CO₂e / view
3.1 MB
Page Weight
30%
Cleaner Than
New Visitor
364 mg
vs
Returning (cached)
182 mg
Annual (10K/mo)
38.2 kg
Emission Segments
Data Center
16 mg
Network
94 mg
Device
209 mg
Resource Breakdown
JavaScript
13.0 KB
Images
3.0 MB
CSS
35.1 KB
HTML
5.3 KB
Green Hosting Verified
Cloudflare
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

78%Good
Static / Informational

HTTPS

WAF

32d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

11.03.2026

Valid Until

09.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

undertale.com

SHA-256 Fingerprint

B0:1E:B6:41:D1:A8:05:CD:E3:E1:7D:4D:A1:F6:0F:B8:7F:1D:6E:BD...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin
*
alt-svc
h3=":443"; ma=86400
cache-control
🟡 0s(public, max-age=0, must-revalidate)
cf-cache-status
DYNAMIC
cf-ray🇫🇷 Paris
9f7edc0aa9add0bf-CDG
content-encoding
⚡ Brotli(br)
Good Warning Issue

Email Infrastructure

Google Workspace

Score

20

SPF
DKIM
DMARC

MX Records (5)

alt1.aspmx.l.google.com
alt3.aspmx.l.google.com
aspmx.l.google.com
alt2.aspmx.l.google.com

+1 more

Domain Information

undertale.com

Domain Age
13 years

Created

25.04.2013

Expires

25.04.2027

Last Updated

24.03.2026

Registrar

Name.com, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
C
61/100
Mobile Friendly
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=1.0, viewport-fit=cover
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system + 8bitOperatorPlus-Bold

WCAG Fail
61/100
Readability
/30
21/30

16px · LH 1.50

Hierarchy
/20
7/20

1x ratio

WCAG
/25
14/25

1:1 min contrast

Performance
/25
19/25

System fonts

Heading Font

-apple-system

Sans16px

Body Font

8bitOperatorPlus-Bold

Sans16px

Contrast Ratio

1:1

41 issues

Reading Comfort

Dual Sans-Serif

left aligned
16px
h1
24px
h2
24px
h3
16px
p
Major Second
Scale

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 23/100. Consider shorter sentences and simpler words.

❌ Low contrast: 41 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

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

Flesch 23

Color Palette

9 unique colors
20.82:1 AAA Dark
#000000
Primary· 77.4%
#fefefe
Background· 3.9%
#01004c
Accent· 8.1%
#201e2b
Secondary· 0.8%
#020228
Accent· 0.30000000000000004%
#333c51
Secondary· 0.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

3 Resources

2
Scripts
1
Styles
0
Async
2
Defer

Top Script Sources

local(1)static.cloudflareinsights.com(1)

Website Identity

undertale.com

13 years old
Location detected: 🇨🇦 Canadavia ip
Name.com, Inc.📧 Google Workspaceen

Social Profiles

X (Twitter)Bluesky

Sponsored

Last analyzed: 07 May 2026 at 08:30

Historical Analysis & Change Tracking