opensea.io
OpenSea, exchange everything — token trading and NFT marketplace
Last scanned Jul 29, 2026, 4:00 PM · 8 views
Overall score
Great
Summary
OpenSea, exchange everything — token trading and NFT marketplace. This website uses Next.js behind Cloudflare CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance fair (65/100). Top issue: Title longer than 60 characters.
OpenSea, exchange everything — token trading and NFT marketplace. Welcome to the best place to discover, trade, and create onchain.
Top issues to fix
6 issues found
3 cookies 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.
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.
Heavy page (2.1 MB)
PerformanceAim for under 2 MB: compress images and split large JavaScript bundles.
20 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
3 issue(s) found
Performance
513 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-3 overall since Jul 21, 2026
- Overall
- 87
- SEO
- 85
- Security
- 100
- Performance
- 65
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
OpenSea, exchange everything — token trading and NFT marketplace. Welcome to the best place to discover, trade, and create onchain.
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
- —
- 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
- Let's Encrypt
- Subject
- opensea.io
- Valid from
- Jul 9, 2026
- Valid to
- Oct 7, 2026
- Days until expiry
- 69
- 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 · 4 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
98 internal · 4 external · 20 broken
Images
135 total · 0 missing alt
Scripts / Styles
303 scripts · 3 stylesheets
JS / CSS size
1.4 MB · 18.0 KB
Page size
2.1 MB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Title longer than 60 characters
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://opensea.io
- Final URL
- https://opensea.io
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 470 ms
- HTML size
- 2.1 MB
- Redirect chain
- https://opensea.io
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does opensea.io use?
- opensea.io is built with Next.js.
- 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?
- Hosting provider information for opensea.io is not available yet.
- What is opensea.io's SEO score?
- opensea.io scored 85/100 for SEO in the latest analysis (great).
- What is opensea.io's overall website score?
- opensea.io has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.
- Has opensea.io's score changed over time?
- opensea.io's overall score has declined by 3 points (from 90 to 87) since Jul 21, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card