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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

StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one for its tech stack and scored 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.

Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.

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 28 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
3/3 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
AS36454 · GB
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
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
10.5 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
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (57 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/PDF-Flip-Privacy
Terms of Service
/PDF-Flip-Terms
86% unique

Security Headers (3/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Performance

513ms response time
Faster than 29% 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.