zearn.org
Login | Zearn Math
Last scanned Jul 29, 2026, 1:00 PM · 14 views
Overall score
Excellent
Summary
Zearn is a nonprofit educational organization that develops Zearn Math, a top-rated K-8 math learning platform designed to reinforce teacher-led instruction and help all students succeed in rigorous, grade-level math. This website uses Ruby on Rails. SEO is good (75/100) and accessibility is excellent (90/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Missing canonical link.
Zearn
Zearn is a nonprofit educational organization that develops Zearn Math, a top-rated K-8 math learning platform designed to reinforce teacher-led instruction and help all students succeed in rigorous, grade-level math.
- New York, NY, 10087, US
Top issues to fix
4 issues found · 1 high priority
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
SEO
4 issue(s) found
Performance
403 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
-2 overall since Jul 18, 2026
- Overall
- 91
- SEO
- 75
- Security
- 100
- Performance
- 100
- Accessibility
- 90
Organization
Company details published in this site's own structured data.
Zearn
Zearn is a nonprofit educational organization that develops Zearn Math, a top-rated K-8 math learning platform designed to reinforce teacher-led instruction and help all students succeed in rigorous, grade-level math.
- Founded
- Jan 1, 2012
Contact
Email, phone, and address published on this site's own pages.
- support@zearn.org
- Address
- New York, NY, 10087, US
Meta tags
- Title
- Login | Zearn Math
- Description
- Learning with Zearn helps math make sense. Students explore math through pictures, visual models, and real-life examples. Log in to your Zearn account.
- Canonical
- Language
- en-US
- Charset
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- index, follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
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
- Sectigo Limited
- Subject
- www.zearn.org
- Valid from
- Dec 18, 2025
- Valid to
- Nov 9, 2026
- Days until expiry
- 103
- SAN domains
- www.zearn.org, webassets.zearn.org, zearn.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: none · 1 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
14 scripts · 20 stylesheets
JS / CSS size
76.1 KB · 0 B
Page size
89.6 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
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://zearn.org
- Final URL
- https://www.zearn.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 402 ms
- HTML size
- 89.6 KB
- Redirect chain
- https://zearn.org → https://www.zearn.org/
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Frequently asked questions
- What technology does zearn.org use?
- zearn.org is built with Ruby on Rails.
- Is zearn.org secure (HTTPS)?
- Yes. zearn.org uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Nov 9, 2026.
- Who hosts zearn.org?
- Hosting provider information for zearn.org is not available yet.
- What is zearn.org's SEO score?
- zearn.org scored 75/100 for SEO in the latest analysis (fair).
- What is zearn.org's overall website score?
- zearn.org has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
- What company operates zearn.org?
- zearn.org is operated by Zearn. Zearn is a nonprofit educational organization that develops Zearn Math, a top-rated K-8 math learning platform designed to reinforce teacher-led instruction and help all students succeed in rigorous, grade-level math.
- Has zearn.org's score changed over time?
- zearn.org's overall score has declined by 2 points (from 93 to 91) since Jul 18, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card