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c9.io

Cloud IDE - AWS Cloud9 - AWS

Last scanned Aug 3, 2026, 3:00 PM · 10 views

95

Overall score

Excellent

Summary

AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser. This website uses React behind CloudFront CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: robots.txt not found.

AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser.

Top issues to fix

5 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • 2 cookies without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

  • 20 broken links on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

90

SEO

2 issue(s) found

100

Performance

713 ms

90

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+6 overall since Jul 26, 2026

Overall
95
SEO
90
Security
90
Performance
100
Accessibility
100

Organization

Company details published in this site's own structured data.

AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser.

X (Twitter)FacebookLinkedInInstagramYouTube

Meta tags

Title
Cloud IDE - AWS Cloud9 - AWS
Description
AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser.
Canonical
https://aws.amazon.com/cloud9/
Language
en-US
Charset
UTF-8
Viewport
width=device-width, initial-scale=1.0
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Cloud IDE - AWS Cloud9 - AWS
og:description
AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser.
og:type
website
og:url
https://aws.amazon.com/cloud9/

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

React

Hosting & CDN

Hosting provider
—
CDN provider
CloudFront
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
aws.amazon.com
Valid from
Nov 6, 2025
Valid to
Oct 17, 2026
Days until expiry
75
SAN domains
aws.amazon.com, aws-us-west-2.amazon.com, www.aws.amazon.com, 1.aws-lbr.amazonaws.com, amazonaws-china.com, www.amazonaws-china.com, aws-us-east-1.amazon.com

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 2 cookie(s) observed

Content & assets

Headings

H1 1 · H2 12 · H3 7

Links

37 internal · 21 external · 20 broken

Images

2 total · 0 missing alt

Scripts / Styles

26 scripts · 11 stylesheets

JS / CSS size

86.8 KB · 148 B

Page size

230 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://c9.io
Final URL
https://aws.amazon.com/cloud9/
HTTP status
200
HTTP version
HTTP/2
Response time
709 ms
HTML size
230 KB
Redirect chain
https://c9.io → https://aws.amazon.com/cloud9 → https://aws.amazon.com/cloud9/

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Frequently asked questions

What technology does c9.io use?
c9.io is built with React.
Is c9.io secure (HTTPS)?
Yes. c9.io uses TLS 1.3 with a certificate issued by Amazon, valid until Oct 17, 2026.
Who hosts c9.io?
Hosting provider information for c9.io is not available yet.
What is c9.io's SEO score?
c9.io scored 90/100 for SEO in the latest analysis (excellent).
What is c9.io's overall website score?
c9.io has an overall SiteGraph score of 95/100, combining SEO, performance, security, and accessibility.
Has c9.io's score changed over time?
c9.io's overall score has improved by 6 points (from 89 to 95) since Jul 26, 2026.