mqtt.org
MQTT - The Standard for IoT Messaging
Last scanned Jul 26, 2026, 4:17 PM
Overall score
Fair
Summary
A lightweight messaging protocol for small sensors and mobile devices, optimized for high-latency or unreliable networks, enabling a Connected World and the Internet of Things. This website uses Google Analytics hosted on Fastly behind Fastly CDN. SEO is good (80/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
A lightweight messaging protocol for small sensors and mobile devices, optimized for high-latency or unreliable networks, enabling a Connected World and the Internet of Things
- United States
- Hosted on Fastly
Top issues to fix
8 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
+2 more issues — details in the sections below.
SEO
3 issue(s) found
Performance
4 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
A lightweight messaging protocol for small sensors and mobile devices, optimized for high-latency or unreliable networks, enabling a Connected World and the Internet of Things
Meta tags
- Title
- MQTT - The Standard for IoT Messaging
- Description
- A lightweight messaging protocol for small sensors and mobile devices, optimized for high-latency or unreliable networks, enabling a Connected World and the Internet of Things
- Canonical
- https://mqtt.org/
- Language
- en
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- mqtt.org
- Valid from
- Jun 24, 2026
- Valid to
- Sep 22, 2026
- Days until expiry
- 55
- SAN domains
- mqtt.org, www.mqtt.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 3 · H3 6
Links
12 internal · 0 external · 0 broken
Images
3 total · 2 missing alt
Scripts / Styles
5 scripts · 2 stylesheets
JS / CSS size
85.9 KB · 7.7 KB
Page size
7.9 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 7
SEO issues
- Meta description longer than 160 characters
- No structured data (JSON-LD) found
- Missing OpenGraph tags
Accessibility issues
- Over half of images are missing alt text
Scan details
- Requested URL
- https://mqtt.org
- Final URL
- https://mqtt.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 4 ms
- HTML size
- 7.9 KB
- Redirect chain
- https://mqtt.org
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Frequently asked questions
- What technology does mqtt.org use?
- mqtt.org is built with jQuery, Google Analytics.
- Is mqtt.org secure (HTTPS)?
- Yes. mqtt.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 22, 2026.
- Who hosts mqtt.org?
- mqtt.org is hosted on Fastly, behind Fastly CDN.
- What is mqtt.org's SEO score?
- mqtt.org scored 80/100 for SEO in the latest analysis (great).
- What is mqtt.org's overall website score?
- mqtt.org has an overall SiteGraph score of 79/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card