What technology does mastodon.online use?

We did not detect any specific technologies for mastodon.online in the latest scan.

Is mastodon.online secure (HTTPS)?

Yes. mastodon.online uses TLS 1.3 with a certificate issued by Certainly, valid until Aug 29, 2026.

Who hosts mastodon.online?

Hosting provider information for mastodon.online is not available yet.

What is mastodon.online's SEO score?

mastodon.online scored 65/100 for SEO in the latest analysis (fair).

What is mastodon.online's overall website score?

mastodon.online has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.

Has mastodon.online's score changed over time?

mastodon.online's overall score has improved by 5 points (from 83 to 88) since Jul 26, 2026.

mastodon.online

Mastodon

Last scanned Aug 2, 2026, 4:00 PM · 5 views

Overall score

Great

Summary

A newer server of Mastodon, operated by Mastodon GmbH for the common good. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Missing canonical link.

A newer server of Mastodon, operated by Mastodon GmbH for the common good.

Top issues to fix

6 issues found · 1 high priority

No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
TLS certificate expires in 26 days
Security
Renew soon or enable auto-renewal to avoid a browser-warning outage.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
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.

SEO

5 issue(s) found

100

Performance

250 ms

100

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Score history

+5 overall since Jul 26, 2026

Overall: 88
SEO: 65
Security: 100
Performance: 100
Accessibility: 90

Organization

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

A newer server of Mastodon, operated by Mastodon GmbH for the common good.

Meta tags

Title: Mastodon
Description: A newer server of Mastodon, operated by Mastodon GmbH for the common good.
Canonical
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1, viewport-fit=cover
Robots meta
Manifest: https://mastodon.online/manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: Fastly
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Certainly
Subject: mastodon.online
Valid from: Jul 30, 2026
Valid to: Aug 29, 2026
Days until expiry: 26
SAN domains: files.mastodon.online, mastodon.online, www.mastodon.online

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

0 internal · 0 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

5 scripts · 18 stylesheets

JS / CSS size

9.7 KB · 0 B

Page size

53.8 KB

Robots.txt & Sitemap

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

SEO issues

Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://mastodon.online
Final URL: https://mastodon.online
HTTP status: 200
HTTP version: HTTP/2
Response time: 249 ms
HTML size: 53.8 KB
Redirect chain: https://mastodon.online

See something wrong on this report? Request a correction

Frequently asked questions

What technology does mastodon.online use?: We did not detect any specific technologies for mastodon.online in the latest scan.
Is mastodon.online secure (HTTPS)?: Yes. mastodon.online uses TLS 1.3 with a certificate issued by Certainly, valid until Aug 29, 2026.
Who hosts mastodon.online?: Hosting provider information for mastodon.online is not available yet.
What is mastodon.online's SEO score?: mastodon.online scored 65/100 for SEO in the latest analysis (fair).
What is mastodon.online's overall website score?: mastodon.online has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
Has mastodon.online's score changed over time?: mastodon.online's overall score has improved by 5 points (from 83 to 88) since Jul 26, 2026.