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zeptojs.com

https://zeptojs.com· First analyzed 12 May 2026· Updated 12 May 2026
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zeptojs.com
Desktop screenshot of zeptojs.com
Mobile screenshot of zeptojs.com
Mobile

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Hosting Provider

GitHub Pages
pages.github.com

IP Address

185.199.110.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

ns1.dnsimple.com.ns2.dnsimple-edge.net.ns3.dnsimple.com.ns4.dnsimple-edge.org.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
690 ms10%
Speed Index
897 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
303 KB
9 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
GitHub Pages
CDN
Fastly

Technology Stack

2 Technologies Detected

Analytics

2
Google Analytics
Segment

SEO Analysis

D52/100
13
10
1
Meta Tags10/15
Content12/12
Headings3/8
Technical9/21
E-E-A-T0/7
Images2/7
Links4/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
Z
zeptojs.comzeptojs.com

Zepto.js: the aerogel-weight jQuery-compatible JavaScript library

The aerogel-weight jQuery-compatible JavaScript library

Title Length65 chars

Recommended: 50-60 chars (~391px / 580px)

Description Length56 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

11 issues found

Upgrade to view details

Local SEO

Local Search Readiness

0/100
Poor
15 2

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

Sponsored

AI & LLM Readiness

F36/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
6/25

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 blocks
Text ratio:38%
Words:8,961
Token eff.:Acceptable
Sections/1K:11.9
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary25w
Descriptive Headingsavg 1.4w
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.
C
60/100
7
Passed
5
Critical
0
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
10/20
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
1/15
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.
60/100
A+
38 mg
CO₂e / view
302.8 KB
Page Weight
90%
Cleaner Than
New Visitor
43 mg
vs
Returning (cached)
21 mg
Annual (10K/mo)
4.5 kg
Emission Segments
Data Center
8 mg
Network
9 mg
Device
20 mg
Resource Breakdown
JavaScript
11.3 KB
Images
262.0 KB
CSS
3.6 KB
HTML
25.9 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

71d

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

23.04.2026

Valid Until

22.07.2026

Subject Alternative Names (1)

zeptojs.com

SHA-256 Fingerprint

E9:F9:F2:4B:8B:9B:3C:AB:40:C1:16:A0:6F:7E:A2:C9:9B:74:37:EB...

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
26226
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

zeptojs.com

Domain Age
15y 7m

Created

20.09.2010

Expires

20.09.2026

Last Updated

22.11.2025

Registrar

1API GmbH

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Data Protection Officer mentioned

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.
D
43/100
Not 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
initial-scale=1.0, maximum-scale=1.0, user-scalable=no
5 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica Neue

WCAG AA
77/100
Readability
/30
22/30

14px · LH 1.57

Hierarchy
/20
16/20

2.2x ratio · ✓ H1→H6

WCAG
/25
19/25

4.98:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Helvetica Neue

Sans31px

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

4.98:1

WCAG AA (≥4.5:1)

Reading Comfort

~46 CPL

Optimal (45–75)
31px
h1
20px
h2
16px
h3
14px
h4
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.57 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~46 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 47/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.0:1).

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

Flesch 47

Color Palette

8 unique colors
Light
#ffffff
Background· 61.3%
#f3eaff
Primary· 17.1%
#9865f8
Accent· 9.5%
#9fa3b7
Border· 3.1%
#a57be3
Accent· 3%
#702f94
Accent· 2.6%
#d3c9dd
Secondary· 2.3%
#8377e2
Accent· 1.2%

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

3 Resources

2
Scripts
1
Styles
1
Async
0
Defer

Top Script Sources

google-analytics.com(1)zepto-docs.min.js(1)

Website Identity

zeptojs.com

15 years old
Location detected: 🇺🇸 United Statesvia ip
1API GmbH

Social Profiles

GitHub

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Last analyzed: 12 May 2026 at 11:39

Historical Analysis & Change Tracking