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zettlr.com

https://zettlr.com· First analyzed 13 May 2026· Updated 13 May 2026
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zettlr.com
Desktop screenshot of zettlr.com
Mobile screenshot of zettlr.com
Mobile

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Hosting Provider

netcup GmbH

IP Address

45.129.183.60

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS197540

Organization

netcup GmbH

Server

Apache

Nameservers

ns25.domaincontrol.com.ns26.domaincontrol.com.

Performance

84

Core Web Vitals

Weight

First Contentful Paint
1.9 s10%
Speed Index
2.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
6.5 MB
65 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
October CMS

Technology Stack

5 Technologies Detected

CSS Frameworks

2
Tailwind CSS
UIkit

Icon Libraries

1
Font Awesome

Analytics

1
Matomo

Web Servers

1
Apachev2.4.67

SEO Analysis

A80/100
23
4
1
Meta Tags13/15
Content11/12
Headings8/8
Technical23/25
E-E-A-T5/7
Images1/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
Z
zettlr.comzettlr.com

Your One-Stop Publication Workbench | Zettlr

Your One-Stop Publication Workbench. Author Markdown documents with ease. For researchers, journalists, and writers.

Title Length44 chars

Recommended: 50-60 chars (~267px / 580px)

Description Length116 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (40/51) — critical for accessibility and SEO

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

64 URLs

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

15/100
Poor
4 13

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

Sponsored

AI & LLM Readiness

D50/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
3/25
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:12%
Words:1,040
Token eff.:Optimal
Sections/1K:18.3
Depth:1/5

Structured Data

1 JSON-LD
Organization×1.1
sameAs entity links

Citation Readiness

Opening Summary22w
Descriptive Headingsavg 4.3w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (6)
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
68/100
11
Passed
4
Critical
1
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
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
9/15
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.
26/100
F
677 mg
CO₂e / view
6.5 MB
Page Weight
5%
Cleaner Than
New Visitor
774 mg
vs
Returning (cached)
387 mg
Annual (10K/mo)
81.2 kg
Emission Segments
Data Center
33 mg
Network
199 mg
Device
445 mg
Resource Breakdown
JavaScript
156.8 KB
Images
6.4 MB
HTML
10.9 KB
Other
30.6 KB
Green Hosting Verified
netcup GmbH
GWF Verified
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

82d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

05.05.2026

Valid Until

03.08.2026

Subject Alternative Names (2)

www.zettlr.comzettlr.com

SHA-256 Fingerprint

A2:A3:C2:8C:CB:6A:10:D4:78:44:0D:A8:A8:5F:59:C5:01:0C:3B:97...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-cache, private)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Wed, 13 May 2026 01:03:39 GMT
keep-alive
timeout=5, max=100
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

mxext3.mailbox.org
mxext2.mailbox.org
mxext1.mailbox.org

Domain Information

zettlr.com

Domain Age
10 years

Created

01.05.2016

Expires

01.05.2027

Last Updated

01.04.2026

Registrar

Mesh Digital Limited

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
67/100
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=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG Partial
81/100
Readability
/30
26/30

16px · LH 1.50

Hierarchy
/20
16/20

4x ratio · ✓ H1→H6

WCAG
/25
17/25

2.68:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

-apple-system

Sans64px

Body Font

-apple-system

Sans16px

Contrast Ratio

2.68:1

14 issues

Reading Comfort

~34 CPL

Narrow lines
64px
h1
64px
h2
52px
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: 14 elements below WCAG AA threshold (min 2.7:1).

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

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

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

Flesch 52

Color Palette

5 unique colors
Light
#ffffff
Background· 84.3%
#cfdcd8
Primary· 3.7%
#496f62
Secondary· 3.4%
#99bdb1
Secondary· 2.8%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

15 Resources

12
Scripts
3
Styles
1
Async
1
Defer

Top Script Sources

cdnjs.cloudflare.com(5)zettlr.com(4)unpkg.com(2)matomo.zettlr.com(1)

Website Identity

Zettlr

Zettlr

Organization
www.zettlr.com
10 years old
Location detected: 🇩🇪 Germanyvia ip
Mesh Digital Limiteden

Social Profiles

GitHubRedditBluesky

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Last analyzed: 13 May 2026 at 01:03

Historical Analysis & Change Tracking