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PDF FlipBook

PDF to flipbook converter and flipbook maker. Convert PDF to flipbook online. Turn PDF into flipbook. No ads, full control.

Productivity

Added April 13, 2026 · Last analysed April 13, 2026 · via · 50% unique tagline

Own this Launch?
Screenshot of PDF FlipBook

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 13 April 2026; the live site may have changed since.

PDF FlipBook scores highly overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Main gaps: missing several security headers and incomplete email security.

Launched on Product Hunt on April 3, 2026. The site is hosted on A2 Hosting, with a domain registered in 2016. Our crawler found 11 technologies on this site, covering transactional email, hosting, CSS frameworks, and ecommerce. The stack includes Bootstrap, Freemius, and A2 Hosting.

It's also one of only 20 launches we've crawled running Freemius.

If you own this site, refresh the snapshot and see the full fix list any time →

8.6
StackScope Score
Excellent
100/100 Launch Readiness
Launch ready
3/6 Security Headers
Decent
3/3 Legal
Complete
2/2 Crawl files
Complete
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (11)

Infrastructure
Hosting A2 Hosting
MySecureCloudHost DNS
Server Apache (2)
Email
Business email MySecureCloudHost Email
Transactional email Resend
SendGrid
Build & Framework
CSS framework Bootstrap (2)
Font Google Fonts
Package CDN jsDelivr (2)
Analytics & Marketing
SEO Google Search Console
Commerce & Payments
Ecommerce Freemius

Infrastructure

Network
WHG-DAL, GB
AS36454 · GB
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
SSL Certificate
Let's Encrypt
Valid 10 Apr 2026 to 9 Jul 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
10.4 years
Registered Feb 2016 · Key-Systems GmbH

Email Security

✓
SPF ~all Soft-fail (~all). Common and accepted.
✓
DKIM Detected via known email provider
✗
DMARC p=none None (p=none). Monitoring only.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (57 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/PDF-Flip-Privacy
✓ Terms of Service
/PDF-Flip-Terms
88% unique
Mentions:
GDPR Cookies Do Not Sell

Security Headers (3/6)

✓
Referrer-Policy
✗
X-Frame-Options
✓
Permissions-Policy experimental (check browser support)
✓
X-Content-Type-Options
✗
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Performance

513ms response time
Faster than 34% of sites
6 third-party domains loaded

Build

✓ Code splitting
8 JS files
15 CSS files
6 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.