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Letterbox

Letters shaped by text. Pick a font, choose your colors, and watch type come alive.

www.letterbox.sh · Added April 7, 2026 · Last analysed April 10, 2026· via Product Hunt

Screenshot of Letterbox
This analysis is a snapshot taken on 10 April 2026. The site may have changed since then and results may not reflect its current state.
5.4
StackScope Score
Fair
20/100 Vibe Score
Few AI signals
75/100 Launch Readiness
Well prepared
1/6 Security Headers
Poor
neutral
AI Stance
No AI stance declared

Tech Stack (8)

Technology Category Detected via
Vercel analytics script_src
Tailwind CSS css_framework structural_signal
Vercel DNS dns_provider ns_host
Google Fonts font link_href
React framework structural_signal
Vercel hosting http_header_name
Next.js meta_framework http_header_name meta_name script_src
HSTS security http_header_name

Infrastructure

Hosting
AMAZON-02 - Amazon.com, Inc., US
AS16509 · US
SSL Certificate
Let's Encrypt
Expires 2 Jul 2026

Readiness Breakdown How?

✓ Favicon present
✓ Open Graph tags (title, image, description)
✓ Responsive viewport meta tag
✓ Custom title and meta description
✓ Twitter card meta tags
✓ Semantic HTML (nav, main, article)
- Canonical URL declared
- Source maps not exposed in production
- Error tracking service installed
- Privacy policy page present

Vibe Score Breakdown How?

SignalPoints
Writing style patterns +5
Typography patterns +15

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

Well-Known Files

✗ robots.txt
✗ llms.txt
✗ security.txt
✓ sitemap.xml
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
Detection works best on English language sites.

Security Headers (1/6)

✗ Referrer-Policy
✗ X-Frame-Options
✗ Permissions-Policy
✗ X-Content-Type-Options
✗ Content-Security-Policy
✓ Strict-Transport-Security
– X-XSS-Protection (legacy)

Performance

340ms response time
Faster than 49% of sites
2 third-party domains loaded

Build

✓ HTML minified
10 JS files
2 Third-party domains
Is this your site? 6 tips to improve your score
- Add a robots.txt file to control how search engines and bots crawl your site. Learn more
- Add a privacy policy. Free generators like Termly or Iubenda can create one in minutes.
- Add a /.well-known/security.txt so security researchers can reach you. Learn more
- Consider adding a llms.txt file to help AI models understand your site. Not yet a standard, but gaining adoption. Learn more
- Improve your security headers. Scan your site at securityheaders.com to see what's missing.
- Add a <link rel="canonical"> tag to prevent duplicate content issues. Learn more
Embed this score on your site
StackScope Score 
<a href="https://stackscope.dev/launch/f9q0beux/letterbox"><img src="https://stackscope.dev/badge/f9q0beux.svg" alt="StackScope Score" height="28" /></a>