Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 151.101.1.91 |
| CDN | CDN (MISS, MISS) |
| Compression | gzip |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 151.101.1.91
CDN CDN (MISS, MISS)
Compression gzip
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Performance
| DNS Lookup | 34.7 ms |
| TCP Connect | 35.8 ms |
| TLS Handshake | 5.2 ms |
| Time To First Byte (TTFB) | 58.2 ms |
| Content Download | 0.5 ms |
| Total Response Time | 58.7 ms |
DNS Lookup 34.7 ms
TCP Connect 35.8 ms
TLS Handshake 5.2 ms
Time To First Byte (TTFB) 58.2 ms
Content Download 0.5 ms
Total Response Time 58.7 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=31536000; includeSubDomains; preload |
| CSP | ✔ Configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ✔ nosniff |
| Referrer Policy | origin-when-cross-origin |
| Permissions Policy | ✔ Configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=31536000; includeSubDomains; preload
CSP ✔ Configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ✔ nosniff
Referrer Policy origin-when-cross-origin
Permissions Policy ✔ Configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Meta Description | Learn more about Mastodon, the radically different, free and open-source decentralized social media platform. |
| Canonical | https://joinmastodon.org/ |
| Open Graph Title | Mastodon - Decentralized social media |
| Open Graph Description | Learn more about Mastodon, the radically different, free and open-source decentralized social media platform. |
| Open Graph Image | https://joinmastodon.org/_next/static/media/preview.11f9d... |
| Twitter Card | summary_large_image |
Meta Description Learn more about Mastodon, the radically different, free and open-source decentralized social media platform. Canonical https://joinmastodon.org/ Open Graph Title Mastodon - Decentralized social media Open Graph Description Learn more about Mastodon, the radically different, free and open-source decentralized social media platform. Open Graph Image https://joinmastodon.org/_next/static/media/preview.11f9d... Twitter Card summary_large_image Detected Technologies
| Technology | React Google Analytics Node.js Next.js |
Technology React Google Analytics Node.js Next.js
HTTP Headers
| Cache-control
| s-maxage=300, stale-while-revalidate=31535700 |
| Content-encoding
| gzip |
| Content-security-policy
| default-src 'self'; child-src 'self'; object-src 'none'; img-src 'self' proxy.joinmastodon.org blob: data: https://queue.simpleanalyticscdn.com https://simpleanalyticsbadges.com; style-src 'self' 'unsafe-inline'; script-src 'self' https://scripts.simpleanalyticscdn.com; connect-src 'self' api.joinmastodon.org https://queue.simpleanalyticscdn.com https://scripts.simpleanalyticscdn.com; block-all-mixed-content |
| Content-type
| text/html; charset=utf-8 |
| Etag
| "7sl72fmwz02o97" |
| Permissions-policy
| camera=(), microphone=(), geolocation=(), browsing-topics=() |
| Referrer-policy
| origin-when-cross-origin |
| X-content-type-options
| nosniff |
| X-nextjs-cache
| HIT |
| Via
| 1.1 varnish, 1.1 varnish |
| Accept-ranges
| bytes |
| Age
| 0 |
| Date
| Thu, 20 Aug 2026 00:55:03 GMT |
| X-served-by
| cache-fra-eddf8230126-FRA, cache-par-lfpb1150062-PAR |
| X-cache
| MISS, MISS |
| X-cache-hits
| 0, 0 |
| Vary
| Accept-Language, Accept-Encoding |
| Strict-transport-security
| max-age=31536000; includeSubDomains; preload |
| Alt-svc
| h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=86400 |
| Content-length
| 15073 |
Meta Tags
| Viewport | width=device-width |
| Description | Learn more about Mastodon, the radically different, free and open-source decentralized social media platform. |
| Apple-itunes-app | app-id=1571998974 |
Cache-control s-maxage=300, stale-while-revalidate=31535700
Content-encoding gzip
Content-security-policy default-src 'self'; child-src 'self'; object-src 'none'; img-src 'self' proxy.joinmastodon.org blob: data: https://queue.simpleanalyticscdn.com https://simpleanalyticsbadges.com; style-src 'self' 'unsafe-inline'; script-src 'self' https://scripts.simpleanalyticscdn.com; connect-src 'self' api.joinmastodon.org https://queue.simpleanalyticscdn.com https://scripts.simpleanalyticscdn.com; block-all-mixed-content
Content-type text/html; charset=utf-8
Etag "7sl72fmwz02o97"
Permissions-policy camera=(), microphone=(), geolocation=(), browsing-topics=()
Referrer-policy origin-when-cross-origin
X-content-type-options nosniff
X-nextjs-cache HIT
Via 1.1 varnish, 1.1 varnish
Accept-ranges bytes
Age 0
Date Thu, 20 Aug 2026 00:55:03 GMT
X-served-by cache-fra-eddf8230126-FRA, cache-par-lfpb1150062-PAR
X-cache MISS, MISS
X-cache-hits 0, 0
Vary Accept-Language, Accept-Encoding
Strict-transport-security max-age=31536000; includeSubDomains; preload
Alt-svc h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=86400
Content-length 15073
