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PDF.chat

Chat with any PDF and get instant answers with citations. Upload contracts, research papers, manuals, or reports and ask questions in seconds. Free to try.

Added June 29, 2026 · Last analysed June 29, 2026 · via Hacker News · 40% unique tagline (similar to OCR.chat)

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 29 June 2026; the live site may have changed since.

PDF.chat scores highly overall, with complete legal pages, a thorough launch checklist, and well-configured email security. Main gaps: missing several security headers.

Launched on Hacker News on June 29, 2026. The site is hosted on Cogent Communications in the United States, with a domain registered in 2025. Our crawler found 9 technologies on this site, covering CSS frameworks, analytics, backend framework, and DNS providers. The stack includes Bootstrap, Tailwind CSS, and Bunny Fonts.

It's also on one of the most common stacks we track, shared by 108 launches.

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 18 · Few 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 (9)

Infrastructure
DNS VPS.org
Server nginx
Build & Framework
CSS framework Bootstrap (3)
Tailwind CSS
Font Bunny Fonts
Package CDN jsDelivr (2)
Analytics & Marketing
Analytics Clicky
SEO Google Search Console
Other
Backend framework Django

Infrastructure

DNS
VPS.org
Authoritative nameserver
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 29 Jun 2026 to 27 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1 year
Registered May 2025 · GoDaddy.com, LLC

Email Security

SPF ~all Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
DMARC p=quarantine Quarantine (moderate)
?
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.

Storage (2)

Cookies (2)
NameLifetimeDetected as
csrftoken 12mo -
sessionid 14d -

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)
Page title is 63 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

Performance How?

410 ms Server response
44% Faster than peers
880 ms Largest contentful paint
0.00 Cumulative layout shift
206 KB Page weight
1 KB Image weight
3 Third-party domains
0 Console errors
0 Failed requests

2 images: 2 missing alt text

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

SignalPoints
AI copy signals +5
AI palette signals +5
AI writing signals +5
AI iconography signals +3

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.

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 (25 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy/
Terms of Service
/terms/
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
46% unique

Security Headers (3/6)

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

Build

3 JS files
3 CSS files
3 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.