What technology does calculat.io use?

calculat.io is built with Google Analytics, Nginx.

Is calculat.io secure (HTTPS)?

Yes. calculat.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 16, 2026.

Who hosts calculat.io?

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

What is calculat.io's SEO score?

calculat.io scored 90/100 for SEO in the latest analysis (excellent).

What is calculat.io's overall website score?

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

calculat.io

Calculatio - Home

Last scanned Jul 26, 2026, 2:19 PM · 2 views

Overall score

Great

Summary

Please select your language. This website uses Nginx. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (90/100). Top issue: robots.txt not found.

Please select your language

Top issues to fix

6 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.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
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.

SEO

2 issue(s) found

Performance

511 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

Please select your language

Contact

Email, phone, and address published on this site's own pages.

Email: ellisonleao@gmail.com

Technologies

Detected frameworks, languages, and tools.

Google Analytics Nginx

Hosting & CDN

Hosting provider: —
CDN provider: —
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: Let's Encrypt
Subject: calculat.io
Valid from: Jul 18, 2026
Valid to: Oct 16, 2026
Days until expiry: 79
SAN domains: calculat.io, ru.calculat.io, www.calculat.io

Security headers

Strict-Transport-SecurityEnabled
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 4 · H3 4

Links

811 internal · 0 external · 20 broken

Images

10 total · 0 missing alt

Scripts / Styles

10 scripts · 0 stylesheets

JS / CSS size

10.7 KB · 51.6 KB

Page size

305 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

Scan details

Requested URL: https://calculat.io
Final URL: https://calculat.io
HTTP status: 200
HTTP version: HTTP/2
Response time: 505 ms
HTML size: 305 KB
Redirect chain: https://calculat.io

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does calculat.io use?: calculat.io is built with Google Analytics, Nginx.
Is calculat.io secure (HTTPS)?: Yes. calculat.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 16, 2026.
Who hosts calculat.io?: Hosting provider information for calculat.io is not available yet.
What is calculat.io's SEO score?: calculat.io scored 90/100 for SEO in the latest analysis (excellent).
What is calculat.io's overall website score?: calculat.io has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.