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celeryproject.org

https://celeryproject.org· First analyzed 02 May 2026· Updated 02 May 2026
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celeryproject.org
Desktop screenshot of celeryproject.org
Mobile screenshot of celeryproject.org
Mobile

Sponsored

Hosting Provider

Gandi
gandi.net

IP Address

217.70.184.55

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Paris, France

ASN

AS29169

Organization

Gandi France L/B Services

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-234-b.gandi.net.ns-196-c.gandi.net.ns-243-a.gandi.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
607 ms10%
Speed Index
789 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
155 KB
19 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Gandi
CDN
Cloudflare

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

CDN

1
Cloudflare

SEO Analysis

D59/100
16
9
1
Meta Tags10/15
Content8/12
Headings8/8
Technical15/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
C
celeryproject.orgceleryproject.org

Celery - Distributed Task Queue — Celery 5.6.3 documentation

No description available for this page.

Title Length60 chars

Recommended: 50-60 chars (~362px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

65 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.

Sponsored

AI & LLM Readiness

F34/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
4/25

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
Text ratio:5%
Words:302
Token eff.:Optimal
Sections/1K:26.5

Structured Data

No Schema

Citation Readiness

Opening Summary15w
Descriptive Headingsavg 1.6w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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
69/100
12
Passed
4
Critical
0
Warnings
Images & Alt Text
10/20
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
7/15
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.
75/100
A+
16 mg
CO₂e / view
154.9 KB
Page Weight
95%
Cleaner Than
New Visitor
18 mg
vs
Returning (cached)
9 mg
Annual (10K/mo)
1.9 kg
Emission Segments
Data Center
<0.001 g
Network
5 mg
Device
10 mg
Resource Breakdown
JavaScript
136.3 KB
Images
3.3 KB
CSS
7.3 KB
HTML
3.2 KB
Other
4.7 KB
Green Hosting Verified
Gandi
Provider Match
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

44%Poor
Interactive

HTTPS

WAF

35d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

09.03.2026

Valid Until

07.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

docs.celeryq.dev

SHA-256 Fingerprint

45:D9:10:7E:E2:CE:43:73:13:FE:12:22:27:02:F6:0F:57:E8:B0:36...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-methods
HEAD, OPTIONS, GET
access-control-allow-origin
*
age
3404
alt-svc
h3=":443"; ma=86400
cache-control
🟡 1200s(max-age=1200)
cdn-cache-control
public
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

celeryproject.org

Domain Age
16y 10m

Created

15.06.2009

Expires

15.06.2027

Last Updated

21.04.2026

Registrar

Gandi SAS

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.
C
68/100
Mobile Friendly7 breakpoints
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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Futura + Optima

WCAG Partial
71/100
Readability
/30
25/30

17px · LH 1.40

Hierarchy
/20
15/20

2x ratio · ✓ H1→H6

WCAG
/25
17/25

4.37:1 min contrast

Performance
/25
14/25

2 fonts

Heading Font

Futura

Sans34px

Body Font

Optima

Sans17px

Contrast Ratio

4.37:1

5 issues

Reading Comfort

~70 CPL

Optimal (45–75)
34px
h1
31px
h2
24px
h3
17px
p

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~70 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 22/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 4.4:1).

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

Buy on MyFontsFlesch 22

Color Palette

8 unique colors
5.38:1 AA Light
#ffffff
Background· 85.09999999999997%
#666b70
Other· 2%
#9daeb8
Primary· 4.1%
#bdc9ad
Secondary· 2%
#a5cc82
Secondary· 1.5%
#eaf2e5
Secondary· 1.5%

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

Ad Networks

EthicalAds

Sponsored

Scripts & Styles

8 Resources

6
Scripts
2
Styles
3
Async
0
Defer

Top Script Sources

_static(3)local(1)media.ethicalads.io(1)server.ethicalads.io(1)

Website Identity

celeryproject.org

16 years old
Location detected: 🇫🇷 Francevia ip
Gandi SASen

Sponsored

Last analyzed: 02 May 2026 at 19:15

Historical Analysis & Change Tracking