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asciinema.org

https://asciinema.org· First analyzed 26 Apr 2026· Updated 26 Apr 2026
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asciinema.org
Desktop screenshot of asciinema.org
Mobile screenshot of asciinema.org
Mobile

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Hosting Provider

Brightbox Systems Ltd

IP Address

109.107.37.0

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 Manchester, United Kingdom

ASN

AS51059

Organization

Brightbox Systems Ltd

Server

Cowboy (Erlang)

Nameservers

ns11.infomaniak.ch.ns12.infomaniak.ch.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
818 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.8 MB
22 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Brightbox Systems Ltd

Technology Stack

1 Technologies Detected

CSS Frameworks

1
Tailwind CSS

SEO Analysis

D53/100
15
7
3
Meta Tags4/15
Content9/12
Headings6/8
Technical13/25
E-E-A-T3/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
A
asciinema.orgasciinema.org

Record and share your terminal sessions, the simple way - asciinema...

No description available for this page.

Title truncated.
Title Length71 chars

Recommended: 50-60 chars (~431px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Title is too long (71 chars, ~431px). Will be truncated in search results.
  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (7/8) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

7 rules

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

D44/100
Bot Access
20/25
Machine Read.
14/25
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
code blocksnavheader/footer
Text ratio:3%
Words:402
Token eff.:Optimal
Sections/1K:27.4
Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary175w
Descriptive Headingsavg 5.5w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
C
68/100
11
Passed
3
Critical
0
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
18/20
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
6/15
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.
31/100
D
223 mg
CO₂e / view
1.8 MB
Page Weight
60%
Cleaner Than
New Visitor
255 mg
vs
Returning (cached)
127 mg
Annual (10K/mo)
26.7 kg
Emission Segments
Data Center
50 mg
Network
54 mg
Device
120 mg
Resource Breakdown
JavaScript
96.9 KB
Images
11.2 KB
CSS
1.6 MB
HTML
8.3 KB
Other
5.3 KB
Green Hosting Not Verified
Brightbox Systems Ltd
4 recommendations
  • •Carbon footprint recommendation preview...
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C

Security Score

61%Fair
Interactive

HTTPS

No WAF

47d

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+H3

Valid From

15.03.2026

Valid Until

13.06.2026

Subject Alternative Names (1)

asciinema.org

SHA-256 Fingerprint

3E:C6:A0:DA:C4:65:32:6B:CD:B8:07:0A:A7:56:99:8E:78:83:56:86...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=2592000
cache-control
🟡 0s(max-age=0, private, must-revalidate)
content-encoding
zstd
content-type
text/html; charset=utf-8
date
Sun, 26 Apr 2026 18:48:31 GMT
referrer-policy
strict-origin-when-cross-origin
Good Warning Issue

Email Infrastructure

Fastmail

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

in1-smtp.messagingengine.com
in2-smtp.messagingengine.com

Domain Information

asciinema.org

Domain Age
12y 7m

Created

20.09.2013

Expires

20.09.2026

Last Updated

08.12.2025

Registrar

Key-Systems GmbH

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, shrink-to-fit=no
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Fira Sans

WCAG Partial
64/100
Readability
/30
25/30

16px · LH 1.50

Hierarchy
/20
12/20

2.5x ratio

WCAG
/25
16/25

1.07:1 min contrast

Performance
/25
11/25

1 font · 5 req

Heading Font

Fira Sans

Sans40px

Body Font

Fira Sans

Sans16px

Contrast Ratio

1.07:1

3 issues

Reading Comfort

~39 CPL

Narrow lines
40px
h1
24px
h2
18px
h3
16px
p

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

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

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.1:1).

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

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

Buy on MyFontsFlesch 61

Color Palette

5 unique colors
4.88:1 AA Dark
#121315
Text· 69.1%
#7b848b
Other· 4.6%
#1f182b
Primary· 11.500000000000002%
#352c47
Secondary· 8.8%
#010003
Accent· 6%

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

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Scripts & Styles

2 Resources

1
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

local(1)

Website Identity

asciinema.org

12 years old
Location detected: 🇬🇧 United Kingdomvia ip
Key-Systems GmbH📧 Fastmailen

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Last analyzed: 26 Apr 2026 at 18:48

Historical Analysis & Change Tracking