opensea.io
OpenSea, exchange everything — token trading and NFT marketplace
Last scanned Jul 21, 2026, 11:40 AM · 1 view
Overall score
Excellent
Top issues to fix
3 issues found
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
Heavy page (2.0 MB)
PerformanceAim for under 2 MB: compress images and split large JavaScript bundles.
Summary
OpenSea, exchange everything — token trading and NFT marketplace. This website uses Next.js hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (95/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance fair (65/100). Top issue: Title longer than 60 characters.
SEO
1 issue(s) found
Performance
503 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- OpenSea, exchange everything — token trading and NFT marketplace
- Description
- OpenSea, exchange everything — token trading and NFT marketplace. Welcome to the best place to discover, trade, and create onchain.
- Canonical
- https://opensea.io
- Language
- en-US
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.18.33.97
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- opensea.io
- Valid from
- Jul 9, 2026
- Valid to
- Oct 7, 2026
- Days until expiry
- 77
- SAN domains
- *.opensea.io, *.testnets.opensea.io, opensea.io
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
74 internal · 0 external · 0 broken
Images
53 total · 0 missing alt
Scripts / Styles
315 scripts · 2 stylesheets
JS / CSS size
1.3 MB · 26.6 KB
Page size
2.0 MB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 10
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Title longer than 60 characters
Accessibility issues
No accessibility issues detected.
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://opensea.io
- Final URL
- https://opensea.io
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 461 ms
- HTML size
- 2.0 MB
- Redirect chain
- https://opensea.io
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Frequently asked questions
- What technology does opensea.io use?
- opensea.io is built with Next.js, Google Analytics.
- Is opensea.io secure (HTTPS)?
- Yes. opensea.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 7, 2026.
- Who hosts opensea.io?
- opensea.io is hosted on Cloudflare, behind Cloudflare CDN.
- What is opensea.io's SEO score?
- opensea.io scored 95/100 for SEO in the latest analysis (excellent).
- What is opensea.io's overall website score?
- opensea.io has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
- Is opensea.io hiring?
- opensea.io has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card