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21st.dev Paid content

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12,000+ hand-crafted React and Tailwind CSS components, templates, and shadcn themes by real design engineers. Preview live, install with one command — for you and your AI agent.

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Updated: 2026-09-23 14:40 Language: English (default) Access: Normal

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21st Full homepage screenshot

Related questions

More questions →
What is 21st.dev?
12,000+ hand-crafted React and Tailwind CSS components, templates, and shadcn themes by real design engineers. Preview live, install with one command — for you and your AI agent.
Does 21st.dev offer paid content?
Paid content or plans are available. Check the website for current prices and included features.
What languages does 21st.dev support?
Primary language: English.
How can I visit 21st.dev?
Use the Visit website link to open the website in a new tab.
What are some alternatives to 21st.dev?
Related websites include vuetifyjs.com, ui.shadcn.com, cline.bot, zustand.docs.pmnd.rs, zustand-demo.pmnd.rs, zipkin.io. Compare their features and pricing for your needs.

Website Overview

Several search or sharing settings need attention. Together they may make snippets, preview images or preferred URLs less consistent across platforms.

Domain and Registration

Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain has about 1 years of registration history; its current configuration provides more context than age alone. The domain uses the common .dev extension, which is not an independent safety signal.

DNS and Email

Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the Google Workspace email service. CAA records restrict which certificate authorities are authorized to issue certificates. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown.

TLS and Certificates

The certificate uses an RSA 2048-bit public key, offering broad client compatibility. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.

HTTP and Browser Security

X-Powered-By exposes backend information: Next.js. The response lacks these common security headers: CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, clickjacking protection. No obvious internal addresses or debug information were found in the headers. The Server header contains the custom value Vercel. No explicit CDN or WAF marker was found in the response headers.

Technology Stack Analysis

The public page identifies Next.js, Google Tag Manager, Google Analytics, Vercel without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

The title has 71 characters and may be truncated in search results. The meta description has 178 characters and may be shortened in search results. Twitter Card metadata is configured. JSON-LD includes Organization data, helping describe the organization as an entity. The observed directives allow indexing and link following.

Hosting and Email

DNSCloudflare
HostingVercel
EmailGoogle Workspace
Location United States flagUnited States 216.150.1.129

User reviews (0)

  • No reviews yet.

Pages, Search and Sharing

Meta description12,000+ hand-crafted React and Tailwind CSS components, templates, and shadcn themes by real design engineers. Preview live, install with one command — for you and your AI agent.
Canonical URLhttps://21st.dev
LanguageEnglish (default)
Twitter Cardsummary_large_image

Social Sharing Preview

11 fields

robots.txt (opens in a new tab)

18 rules
All bots 2 allowed · 7 disallowed
  • Allow/
  • Allow/api/og/
  • Disallow/api/
  • Disallow/r/
  • Disallow/auth/
  • Disallow/sign-in
  • Disallow/admin/
  • Disallow/preview/
  • Disallow/community/bookmarks/
gptbot 2 allowed · 1 disallowed
  • Allow/community/
  • Allow/r/
  • Disallow/community/bookmarks/
claudebot 2 allowed · 1 disallowed
  • Allow/community/
  • Allow/r/
  • Disallow/community/bookmarks/
perplexitybot 2 allowed · 1 disallowed
  • Allow/community/
  • Allow/r/
  • Disallow/community/bookmarks/

Sitemaps

1

Registration details RDAP / WHOIS

Registrar101domain, Inc.
Registered2024-10-10
Expires2027-10-10
Domain statusclient transfer prohibited
Nameserverstroy.ns.cloudflare.com、wanda.ns.cloudflare.com
DNSSECunsigned

DNS records

TypeNameValueTTLPriority
A21st.dev216.150.1.129265—
A21st.dev216.150.16.129265—
MX21st.devaspmx.l.google.com36001
MX21st.devalt1.aspmx.l.google.com36005
MX21st.devalt2.aspmx.l.google.com36005
MX21st.devalt3.aspmx.l.google.com360010
MX21st.devalt4.aspmx.l.google.com360010
NS21st.devtroy.ns.cloudflare.com86400—
NS21st.devwanda.ns.cloudflare.com86400—
TXT21st.devgoogle-site-verification=YFpWIJMGkNWwROIBi6k4tCDond42AzcwikvbTcaAkEs120—
TXT21st.devgoogle-site-verification=hTyRw-FMAZobiHchBR0i-AmZAJ3U3l8CLEU8wldCH40120—
TXT21st.devgoogle-site-verification=lSeXH_a7Xho1aiLtwJZSWs-zRYY1PXilt_-m6JEGtFw120—
TXT21st.devpinterest-site-verification=b11e052f8527ba192c895ae949b5435b120—
TXT21st.devv=MCPv1; k=ed25519; p=EM8lFWBlkVHp1iUfw1JYS5yxWUKkpygsWIVMLLCsT7c=120—
TXT21st.devv=MCPv1; k=ed25519; p=qT1Ka5/Z2MRgUjEmddgACD+Fw0e/lVbqjzVIAjPTUCM=120—
TXT21st.devv=spf1 include:spf.improvmx.com include:_spf.google.com ~all120—
CAA21st.dev0 issue "comodoca.com"3600—
CAA21st.dev0 issue "digicert.com; cansignhttpexchanges=yes"3600—
CAA21st.dev0 issue "letsencrypt.org"3600—
CAA21st.dev0 issue "pki.goog; cansignhttpexchanges=yes"3600—
CAA21st.dev0 issue "ssl.com"3600—
CAA21st.dev0 issuewild "comodoca.com"3600—
CAA21st.dev0 issuewild "digicert.com; cansignhttpexchanges=yes"3600—
CAA21st.dev0 issuewild "letsencrypt.org"3600—
CAA21st.dev0 issuewild "pki.goog; cansignhttpexchanges=yes"3600—
CAA21st.dev0 issuewild "ssl.com"3600—
DMARC_dmarc.21st.devv=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;300—

TLS and certificates

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subject21st.dev
IssuerLet's Encrypt
Valid until2026-11-29T17:57 · Remaining when checked: 67 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HeaderValue
content-typetext/html; charset=utf-8
cache-controlprivate, no-cache, no-store, max-age=0, must-revalidate
serverVercel
strict-transport-securitymax-age=63072000

Identified technologies

Next.jsGoogle Tag ManagerGoogle AnalyticsVercel