yifancode.vercel.app
Measuring…
yifancode.vercel.app
Scanned:
67/ 100
Score by axis
- Security71
- SEO21
- Reputation100
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Fix what matters first
- 1Core security headersHow to fix this →+5
Add X-Content-Type-Options, X-Frame-Options, and Referrer-Policy.
- 2Core Web Vitals (PageSpeed)+5
Improve Core Web Vitals — see the PageSpeed Insights report for specifics.
- 3+2
- 4SPF email anti-spoofing+2
Add an TXT record (v=spf1 …) so others can't spoof email from your domain.
- 5DMARC email anti-spoofing+2
Add a TXT record at _dmarc (v=DMARC1; p=…) to control spoofed-email handling.
Recommendations are ranked by their impact on your score.
All checks
Security
71/ 100- Pass
HTTPS & HTTP→HTTPS redirect
HTTPS available; HTTP redirects to HTTPS
- Pass
TLS certificate validity
Valid; expires in 55 days
expires 2026-09-26 · WR1Good: valid certificate with 30 days or more to expiry
- Pass
HSTS (Strict-Transport-Security)
Present
max-age=63072000; includeSubDomains; preload - Warn
Content-Security-Policy
No Content-Security-Policy header
Add a Content-Security-Policy to mitigate and injection.
- Fail
Core security headers
None present
Add X-Content-Type-Options, X-Frame-Options, and Referrer-Policy.
- Pass
Mixed content (HTTP on HTTPS)
No insecure (http://) subresources
- Warn
SPF email anti-spoofing
No record
Add an TXT record (v=spf1 …) so others can't spoof email from your domain.
- Warn
DMARC email anti-spoofing
No record
Add a TXT record at _dmarc (v=DMARC1; p=…) to control spoofed-email handling.
- N/A
Vulnerable front-end libraries
No recognizable front-end library versions detected
- N/A
CMS known vulnerabilities
No CMS detected
Performance
74/ 100- Pass
Time to First Byte
Fast
88 msFast: under 800 ms · Moderate: 800–1800 ms · Slow: over 1800 ms
- Pass
Text compression
Enabled
br - Pass
HTTP/2 or HTTP/3
Modern
HTTP/2.0Modern: HTTP/2 or HTTP/3 · Outdated: HTTP/1.1 or older
- Pass
Cache-Control
Present
public, max-age=0, must-revalidate - Warn
Core Web Vitals (PageSpeed)
perf 84/100, 3.9 s, 0.00 (lab)
Good: 2.5 s or less · 0.1 or less
Improve Core Web Vitals — see the PageSpeed Insights report for specifics.
SEO
21/ 100- Fail
Page title
Missing <title>
Add a descriptive <title> (roughly 50–60 characters).
- Fail
Meta description
Missing meta description
Add a <meta name="description"> of roughly 50–160 characters.
- Warn
Canonical URL
No canonical link
Add <link rel="canonical"> to avoid duplicate-content issues.
- Warn
robots.txt
No robots.txt found
Add a robots.txt to guide crawlers.
- Warn
XML sitemap
No sitemap found
Publish a sitemap.xml and reference it from robots.txt.
- Warn
Single H1
0 H1 tag(s)
Add exactly one <h1> describing the page.
- N/A
Image alt text
No images on the page
- Warn
Structured data (JSON-LD)
No structured data
Add schema.org to enable rich results.
Infrastructure
83/ 100- N/A
CMS detection
No CMS fingerprint detected
- Pass
Web server
Identified
Vercel - Pass
CDN detection
Detected
Vercel - Pass
TLS version
Up to date
TLS 1.3Up to date: TLS 1.2 or 1.3 · Deprecated: TLS 1.0 or 1.1
- Warn
IPv6 (AAAA record)
No AAAA record
Add an AAAA record to serve visitors over IPv6.
Reputation
100/ 100- Pass
Google Safe Browsing
Not flagged
checked: Google Safe Browsing - Pass
Domain blacklist status
Not on major blocklists
checked: Spamhaus DBL, SURBL - Pass
Domain age
Registered ~6 years ago
2020-01-28Good: 90 days or more since registration
- Pass
Domain expiry
Expires in 3466 days
2036-01-28Good: 30 days or more to expiry
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