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recharts.org

https://recharts.org· First analyzed 24 May 2026· Updated 24 May 2026
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recharts.org
Desktop screenshot of recharts.org
Mobile screenshot of recharts.org
Mobile

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Hosting Provider

GitHub Pages
pages.github.com

IP Address

185.199.108.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

dns2.registrar-servers.com.dns1.registrar-servers.com.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
870 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
704 KB
19 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
GitHub Pages
CDN
Fastly

Technology Stack

4 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

SEO Analysis

D51/100
15
11
1
Meta Tags5/15
Content8/12
Headings8/8
Technical14/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
R
recharts.orgrecharts.org

Recharts

Recharts - Re-designed charting library built with React and D3.

Title Length8 chars

Recommended: 50-60 chars (~49px / 580px)

Description Length64 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (11/12) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

195 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

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

D42/100
Bot Access
20/25
Machine Read.
14/25
Schema Data
0/25
Citation
8/25

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:4%
Words:342
Token eff.:Optimal
Sections/1K:8.8
Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary270w
Descriptive Headingsavg 3w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
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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.
B
70/100
13
Passed
2
Critical
2
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
2/15
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.
3 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
B
87 mg
CO₂e / view
703.6 KB
Page Weight
80%
Cleaner Than
New Visitor
99 mg
vs
Returning (cached)
50 mg
Annual (10K/mo)
10.4 kg
Emission Segments
Data Center
19 mg
Network
21 mg
Device
47 mg
Resource Breakdown
JavaScript
602.3 KB
Images
90.9 KB
CSS
5.2 KB
Fonts
1.2 KB
HTML
4.1 KB
Green Hosting Not Verified
GitHub Pages
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

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

06.04.2026

Valid Until

05.07.2026

Subject Alternative Names (6)

*.github.com*.github.io*.githubusercontent.comgithub.comgithub.iogithubusercontent.com

SHA-256 Fingerprint

EA:69:BC:71:1C:B9:D4:56:98:D2:FD:AA:48:54:D7:DC:08:6A:CD:3A...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
access-control-allow-origin
*
age
0
cache-control
🟡 600s(max-age=600)
content-encoding
📦 Gzip(gzip)
content-length
331
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (5)

eforward2.registrar-servers.com
eforward3.registrar-servers.com
eforward5.registrar-servers.com
eforward4.registrar-servers.com

+1 more

Domain Information

recharts.org

Domain Age
10y 4m

Created

14.01.2016

Expires

14.01.2027

Last Updated

20.12.2025

Registrar

NameCheap, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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
64/100
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, maximum-scale=5
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica Neue + Hiragino Sans GB

WCAG AA
70/100
Readability
/30
20/30

16px · LH 1.50

Hierarchy
/20
19/20

4x ratio · ✓ H1→H6

WCAG
/25
20/25

4.57:1 min contrast

Performance
/25
11/25

System fonts

Heading Font

Helvetica Neue

Sans64px

Body Font

Hiragino Sans GB

Sans16px

Contrast Ratio

4.57:1

WCAG AA (≥4.5:1)

Reading Comfort

Dual Sans-Serif

left aligned
64px
h1
40px
h2
16px
p

✅ 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 0/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.6:1).

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

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

GGoogle FontsFlesch 0

Color Palette

4 unique colors
Light
#ffffff
Background· 95.19999999999997%
#297ba6
Primary· 1.8%
#e9efef
Secondary· 1.6%
#b7c4cb
Secondary· 1.4%

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

4 Resources

2
Scripts
2
Styles
1
Async
0
Defer

Top Script Sources

local(1)googletagmanager.com(1)

Website Identity

recharts.org

10 years old
Location detected: 🇺🇸 United Statesvia ip
NameCheap, Inc.en

Social Profiles

GitHub

Sponsored

Last analyzed: 24 May 2026 at 03:33

Historical Analysis & Change Tracking