costco.com.au

https://costco.com.au· First analyzed 01 May 2026· Updated 01 May 2026

Export

costco.com.au

Mobile

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

34.102.182.210

Site Location

🇦🇺 Australiavia tld

Server Location

🇺🇸 Kansas City, United States

ASN

AS396982

Organization

Google Cloud

Server

Envoy

CDN

Akamai

WAF

Akamai

Nameservers

a28-66.akam.net.a5-64.akam.net.dbru.br.ns.els-gms.att.net.a14-67.akam.net.+4 more

Performance

Core Web Vitals

Weight

First Contentful Paint

803 ms10%

Speed Index

1.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.7 MB

250 requests

Image Optimization

WebPAVIF

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Ghost

Technology Stack

7 Technologies Detected

Analytics

Frameworks

CSS Frameworks

Tag Managers

Customer Support

SEO Analysis

C65/100

Meta Tags12/15

Content3/12

Headings3/8

Technical21/25

E-E-A-T2/7

Images5/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

costco.com.aucostco.com.au

Member Warehouse for Bulk Buys & Quality Brands | Costco Australia

Costco is Australia's premium membership club and retailer for top brands & bulk buys. Shop for exclusive brands, or bulk buy groceries at unbeatable prices.

Title Length66 chars

Recommended: 50-60 chars (~407px / 580px)

Description Length157 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (11 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

14 rules

Sitemap reference found

Local SEO

Local Search Readiness

16/100

Poor

4 13 1

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

Sponsored

AI & LLM Readiness

F31/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

2/25

Citation

2/25

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:0%

Words:919

Token eff.:Optimal

Structured Data

1 JSON-LD

SearchAction

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

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.

80/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

15/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

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.

59/100

180 mg

CO₂e / view

1.7 MB

Page Weight

60%

Cleaner Than

New Visitor

206 mg

Returning (cached)

103 mg

Annual (10K/mo)

21.6 kg

Emission Segments

Data Center

9 mg

Network

53 mg

Device

118 mg

Resource Breakdown

JavaScript

1.1 MB

Images

144.2 KB

CSS

259.8 KB

HTML

210.7 KB

Green Hosting Verified

Google Cloud

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

61%Fair

Interactive

HTTPS

WAF

264d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

Valid From

20.01.2026

Valid Until

20.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (20)

prod-sip.costco.co.ukwww.occ.costco.co.jpwww.costcowholesalefr.costco.frwww.costcowholesalees.costco.eswww.costco.sewww.costco.iswww.costco.frwww.costco.es+12 more

SHA-256 Fingerprint

F0:74:C9:01:3D:55:69:E4:3C:76:B3:43:64:5C:7C:11:92:68:2C:C3...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 2464s(max-age=2464)

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self' https://*.costco.com.au

content-type

text/html; charset=UTF-8

date

Fri, 01 May 2026 02:03:54 GMT

expires

Fri, 01 May 2026 02:44:58 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mx0a-001f9d01.pphosted.com

mx0b-001f9d01.pphosted.com

Domain Information

costco.com.au

Last Updated

08.04.2026

Registrar

Corporation Service Company (Aust) Pty Ltd

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

79/100

Mobile Friendly157 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

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Costco Sans

WCAG Partial

52/100

Readability

/30

17/30

14px · LH 1.40

Hierarchy

/20

7/20

WCAG

/25

10/25

1:1 min contrast

Performance

/25

18/25

1 font · 5 req

Heading Font

Costco Sans

Sans

Body Font

Costco Sans

Sans14px

Contrast Ratio

1:1

16 issues

Reading Comfort

~45 CPL

Narrow lines

32px

24px

14px

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

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

⚠️ Hard to read: Flesch score 33/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 16 elements below WCAG AA threshold (min 1.0:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFontsFlesch 33

Color Palette

9 unique colors

2.79:1 Fail Light

#f2f1f0

Background· 42.09999999999999%

#8b938e

Other· 4.1%

#ed2b32

Accent· 10.1%

#01559e

Primary· 6.4%

#b9c5ca

Secondary· 6.4%

#ecaf99

Accent· 5.7%

#f61310

Accent· 3.7%

#8a444d

Secondary· 3.5%

Business & Marketing Stack

4 Tools Detected

Advanced

Customer Support

ZendeskEnterprise

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)static.queue-it.net(2)scripts.clarity.ms(1)clarity.ms(1)costco.com.au(1)

Website Identity

Costco Wholesale Australia

Corporation

www.costco.com.au/

Location detected: 🇦🇺 Australiavia tld

Corporation Service Company (Aust) Pty Ltden-AU

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 01 May 2026 at 02:04

Historical Analysis & Change Tracking