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sidekiq.org

https://sidekiq.org· First analyzed 15 May 2026· Updated 15 May 2026
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sidekiq.org
Desktop screenshot of sidekiq.org
Mobile screenshot of sidekiq.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

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

Performance

100

Core Web Vitals

Weight

First Contentful Paint
508 ms10%
Speed Index
660 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
144 KB
20 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
GitHub Pages
CDN
Fastly

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Payments

1
Stripe

SEO Analysis

D59/100
16
8
2
Meta Tags13/15
Content10/12
Headings1/8
Technical14/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
S
sidekiq.orgsidekiq.org

Sidekiq: Simple, efficient background jobs for Ruby

Sidekiq is a full-featured background job framework for all Ruby applications. It can scale to thousands of processes and billions of jobs per day. Sidekiq P...

Description truncated.
Title Length51 chars

Recommended: 50-60 chars (~301px / 580px)

Description Length269 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (16/16) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

67 URLs

robots.txt

1 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

5/100
Poor
2 13 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.
11/25
Schema Data
0/25
Citation
11/25

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
navheader/footer
Text ratio:15%
Words:365
Token eff.:Optimal
Sections/1K:8.2
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary17w
Descriptive Headingsavg 1w
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
Upgrade to view recommendations

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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
9
Passed
4
Critical
0
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
3/15
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.
61/100
A+
18 mg
CO₂e / view
144.0 KB
Page Weight
95%
Cleaner Than
New Visitor
20 mg
vs
Returning (cached)
10 mg
Annual (10K/mo)
2.1 kg
Emission Segments
Data Center
4 mg
Network
4 mg
Device
10 mg
Resource Breakdown
JavaScript
12.3 KB
Images
103.9 KB
CSS
24.0 KB
HTML
3.8 KB
Green Hosting Not Verified
GitHub Pages
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

63d

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

19.04.2026

Valid Until

18.07.2026

Subject Alternative Names (2)

sidekiq.orgwww.sidekiq.org

SHA-256 Fingerprint

12:23:36:86:1E:D6:F4:13:AD:2C:05:31:84:53:75:5F:35:5F:46:22...

Top 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
3638
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

sidekiq.org

Domain Age
13y 8m

Created

09.09.2012

Expires

09.09.2032

Last Updated

12.05.2026

Registrar

1API GmbH

DNSSEC
Not Enabled

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
52/100
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
width=device-width, initial-scale=1.0
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Montserrat + Armata

WCAG Partial
59/100
Readability
/30
23/30

16px · LH 1.43

Hierarchy
/20
8/20
WCAG
/25
14/25

1:1 min contrast

Performance
/25
14/25

2 fonts

Heading Font

Montserrat

Sans

Body Font

Armata

Sans16px

Contrast Ratio

1:1

8 issues

Reading Comfort

~43 CPL

Narrow lines
22px
h3
24px
h4
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 40/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

Buy on MyFontsFlesch 40

Color Palette

5 unique colors
Light
#f2f2f2
Background· 65.99999999999999%
#88656f
Primary· 3.1%
#afbabd
Secondary· 2.4%
#dccccf
Secondary· 2.1%

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

2 Resources

1
Scripts
1
Styles
0
Async
1
Defer

Top Script Sources

local(1)

Website Identity

sidekiq.org

info@contribsys.com
13 years old
Location detected: 🇺🇸 United Statesvia ip
1API GmbHen

Social Profiles

GitHub

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Last analyzed: 15 May 2026 at 21:10

Historical Analysis & Change Tracking