StackOptic
Back to Search
ktor.io favicon

ktor.io

https://ktor.io· First analyzed 17 May 2026· Updated 17 May 2026
Export
ktor.io
Desktop screenshot of ktor.io
Mobile screenshot of ktor.io
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

3.164.68.80

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

AmazonS3

CDN

CloudFront

Nameservers

ns-1977.awsdns-55.co.uk.ns-68.awsdns-08.com.ns-927.awsdns-51.net.ns-1027.awsdns-00.org.

Performance

86

Core Web Vitals

Weight

First Contentful Paint
1.7 s10%
Speed Index
2.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.4 MB
41 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Hybrid
⚡ SSG
Frontend
Framework
Gatsbyv5.12.9
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Gatsby

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Other

1
Optimizely

SEO Analysis

C60/100
21
5
2
Meta Tags7/15
Content2/12
Headings8/8
Technical17/25
E-E-A-T0/7
Images7/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
K
ktor.ioktor.io

Ktor: Build Asynchronous Servers and Clients in Kotlin | Ktor Frame...

Kotlin Server and Client Framework for microservices, HTTP APIs, and RESTful services

Title truncated.
Title Length71 chars

Recommended: 50-60 chars (~426px / 580px)

Description Length85 chars

Recommended: 120-160 chars

Issues (2)

  • • Title is too long (71 chars, ~426px). Will be truncated in search results.
  • • Very thin content (0 words). Search engines need substantial content for ranking.

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

1 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

7/100
Poor
2 14 1

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

Sponsored

AI & LLM Readiness

F34/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
2/25
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:0%
Words:352
Token eff.:Optimal

Structured Data

2 JSON-LD
WebSite

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card3/3
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.
C
61/100
7
Passed
6
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
3/20
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
7/15
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.
55/100
C
146 mg
CO₂e / view
1.4 MB
Page Weight
60%
Cleaner Than
New Visitor
167 mg
vs
Returning (cached)
84 mg
Annual (10K/mo)
17.5 kg
Emission Segments
Data Center
7 mg
Network
43 mg
Device
96 mg
Resource Breakdown
JavaScript
703.5 KB
Images
6.9 KB
CSS
276.8 KB
HTML
457.0 KB
Other
2.5 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

83%Very Good
Static / Informational

HTTPS

WAF

191d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.10.2025

Valid Until

24.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

ktor.ioktor.prod.kotlin-aws.intellij.net

SHA-256 Fingerprint

50:C3:BE:48:34:C1:85:0C:85:25:97:6A:4F:95:EF:FF:77:C0:89:34...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
content-length
467693
content-type
text/html
date
Sun, 17 May 2026 07:21:44 GMT
etag
"0704e6cd59d5b3508e23c3b3e359896f"
last-modified
Thu, 23 Apr 2026 12:50:44 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

55

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

Domain Information

ktor.io

Domain Age
8y 10m

Created

16.07.2017

Expires

16.07.2026

Last Updated

19.06.2025

Registrar

MarkMonitor Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner
Cookiebot
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookiebot

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.
B
72/100
Mobile Friendly216 breakpoints
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, shrink-to-fit=no
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

JetBrains Sans

WCAG Partial
72/100
Readability
/30
25/30

16px · LH 1.50

Hierarchy
/20
18/20

4.5x ratio · ✓ H1→H6

WCAG
/25
14/25

3.87:1 min contrast

Performance
/25
15/25

2 fonts · 3 req

Heading Font

JetBrains Sans

Sans72px

Body Font

JetBrains Sans

Sans16px

Contrast Ratio

3.87:1

5 issues

Reading Comfort

~37 CPL

Narrow lines
72px
h1
43px
h2
20px
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: 5 elements below WCAG AA threshold (min 3.9:1).

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

✅ Strong hierarchy: Headlines are 4.5x larger than body text.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 60

Color Palette

9 unique colors
Light
#ffffff
Background· 71.9%
#fe46ec
Accent· 9.5%
#000000
Primary· 0%
#ce52e6
Accent· 4.2%
#f97eec
Accent· 3%
#ec38c0
Accent· 3%
#6d3e95
Secondary· 2.3%
#f3caee
Accent· 2.2%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

A/B Testing & Optimization

1
OptimizelyEnterprise

Experimentation and conversion optimization

2

Categories

3

Total Tools

1

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

10 Resources

9
Scripts
1
Styles
8
Async
0
Defer

Top Script Sources

googletagmanager.com(4)local(3)cdn.cookiehub.eu(1)cdn.optimizely.com(1)

Website Identity

Ktor Framework

Kotlin Server and Client Framework for microservices, HTTP APIs, and RESTful services

8 years old
Location detected: 🇫🇮 Finlandvia ip
MarkMonitor Inc.en

Social Profiles

X (Twitter)GitHub

Sponsored

Last analyzed: 17 May 2026 at 07:22

Historical Analysis & Change Tracking