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leafletjs.com

https://leafletjs.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026
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leafletjs.com
Desktop screenshot of leafletjs.com
Mobile screenshot of leafletjs.com
Mobile

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Hosting Provider

pages.github.com

IP Address

185.199.108.153

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

nsd4.srv53.net.nsd2.srv53.com.nsa2.srv53.org.nsc2.srv53.com.+8 more

Performance

Page Speed

257 KB
41 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
GitHub Pages
CDN
Fastly

Technology Stack

7 Technologies Detected

SEO Analysis

D41/100
6
3
3
L
leafletjs.comleafletjs.com

Leaflet - a JavaScript library for interactive maps

No description available for this page.

Title Length51 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • Missing meta description - important for click-through rates
  • Missing H1 tag - every page should have one H1
  • Many images missing alt text (16/21)

Sponsored

Sponsored

F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

42d

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/2

Valid From

31.12.2025

Valid Until

31.03.2026

Subject Alternative Names (2)

leafletjs.comwww.leafletjs.com

SHA-256 Fingerprint

73:50:39:DF:95:14:5A:D2:EB:9C:97:B0:D2:17:DF:95:87:10:5E:64...

Top Recommendations

Security recommendation preview

HTTP Headers

Developer Console

accept-ranges
bytes
access-control-allow-origin
*
age
120
cache-control
🟡 600s(max-age=600)
content-encoding
📦 Gzip(gzip)
content-length
5261
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

leafletjs.com

Domain Age
13y 12m

Created

21.02.2012

Expires

21.02.2027

Last Updated

04.01.2026

Registrar

Internet Invest, Ltd. dba Imena.ua

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Helvetica Neue

78/100
Readability
/30
40/40

24px · LH 1.50

Hierarchy
/20
15/25

1.33x ratio

WCAG
/25
15/15

Contrast: undefined

Performance
/25
13/20

1 font

Heading Font

Helvetica Neue

Sans32px

Body Font

Helvetica Neue

Sans24px

Contrast Ratio

--

Reading Comfort

~37 CPL

Needs attention
32px
h1
32px
h2
22px
h3
18px
h4
24px
p

✅ Excellent readability: 24px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1

User behavior and product analytics

Social Media

1

Social widgets and sharing tools

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

12 Resources

7
Scripts
5
Styles
1
Async
0
Defer

Top Script Sources

platform.twitter.com(2)docs(2)ssl.google-analytics.com(1)unpkg.com(1)dialog(1)

Website Identity

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Last analyzed: 17 Feb 2026 at 01:30

Historical Analysis & Change Tracking