What technology does tetr.io use?

We did not detect any specific technologies for tetr.io in the latest scan.

Is tetr.io secure (HTTPS)?

Yes. tetr.io uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 25, 2026.

Hosting provider information for tetr.io is not available yet.

What is tetr.io's SEO score?

tetr.io scored 70/100 for SEO in the latest analysis (fair).

What is tetr.io's overall website score?

tetr.io has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.

Has tetr.io's score changed over time?

tetr.io's overall score has improved by 3 points (from 75 to 78) since Jul 26, 2026.

tetr.io

TETR.IO

Last scanned Aug 2, 2026, 8:00 AM · 6 views

Overall score

Fair

Summary

Play TETR.IO, the free-to-win online stacker game in the same genre as Tetris. SEO is fair (70/100) and accessibility is fair (60/100). Security scores excellent (90/100) and performance excellent (90/100). Top issue: Missing canonical link.

Play TETR.IO, the free-to-win online stacker game in the same genre as Tetris. Face off against the world in multiplayer, or claim a spot on the leaderboards!

Top issues to fix

9 issues found · 2 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEO
Keep a single H1 per page and demote the others to H2/H3.
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.

+3 more issues — details in the sections below.

SEO

5 issue(s) found

Performance

211 ms

Security

HTTPS & header checks

Accessibility

2 issue(s) found

Score history

+3 overall since Jul 26, 2026

Overall: 78
SEO: 70
Security: 90
Performance: 90
Accessibility: 60

Organization

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

Play TETR.IO, the free-to-win online stacker game in the same genre as Tetris. Face off against the world in multiplayer, or claim a spot on the leaderboards!

X (Twitter)X (Twitter)

Meta tags

Title: TETR.IO
Description: Play TETR.IO, the free-to-win online stacker game in the same genre as Tetris. Face off against the world in multiplayer, or claim a spot on the leaderboards!
Canonical
Language
Charset: utf-8
Viewport: width=device-width,initial-scale=1,user-scalable=0,maximum-scale=1,minimum-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: Cloudflare
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: Google Trust Services
Subject: tetr.io
Valid from: Jun 27, 2026
Valid to: Sep 25, 2026
Days until expiry: 54
SAN domains: tetr.io, *.tetr.io

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 199 · H2 31 · H3 0

Links

8 internal · 16 external · 20 broken

Images

139 total · 135 missing alt

Scripts / Styles

4 scripts · 1 stylesheets

JS / CSS size

136 B · 2.9 KB

Page size

199 KB

Robots.txt & Sitemap

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

SEO issues

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

Scan details

Requested URL: https://tetr.io
Final URL: https://tetr.io
HTTP status: 200
HTTP version: HTTP/2
Response time: 207 ms
HTML size: 199 KB
Redirect chain: https://tetr.io

See something wrong on this report? Request a correction

Frequently asked questions

What technology does tetr.io use?: We did not detect any specific technologies for tetr.io in the latest scan.
Is tetr.io secure (HTTPS)?: Yes. tetr.io uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 25, 2026.
Who hosts tetr.io?: Hosting provider information for tetr.io is not available yet.
What is tetr.io's SEO score?: tetr.io scored 70/100 for SEO in the latest analysis (fair).
What is tetr.io's overall website score?: tetr.io has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.
Has tetr.io's score changed over time?: tetr.io's overall score has improved by 3 points (from 75 to 78) since Jul 26, 2026.