What powers 
workbookpdf.com?
Last seen Oct 2026 · 17 technologies across 11 categories
Analytics
PostHog
since Sep 2023
Authentication
NextAuth.js
since Sep 2023
Mailgun
since Sep 2023
JavaScript frameworks
Live chat
Crisp Live Chat
since Sep 2023
Miscellaneous
PaaS
Vercel
since Sep 2023
Performance
Priority Hints
since Sep 2023
Programming languages
Node.js
since Sep 2023
Security
HSTS
since Sep 2023
UI frameworks
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 52% phone
- 42% desktop
- 5% tablet
Canada
United States
Sri Lanka
India
United Arab Emirates
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.63 / 10 · ranked #797,163 of all domains
32 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.1 s |
| INP | 125 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Vercel
- Weight: 0.7 MB · 49 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Industry: Software and apps (declares
SoftwareApplication)
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Amazon Web Services (76.76.21.21)
- DNS: Namecheap
- Email: no MX record returned, SPF names Mailgun
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 11,386,063, 2 hosts
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted