PDF Viewer

Open, search, bookmark, listen to, print, and share PDFs on Android phones and tablets with a fast modern PDF reader.

Productivity

Added July 1, 2026 · Last analysed July 1, 2026 · via · also on PeerPush

Own this Launch?

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 1 July 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 Viewer is largely in shape, with complete legal pages, a thorough launch checklist, and clean crawl signals. Worth fixing first: missing several security headers and no email security records.

Launched on Product Hunt on July 1, 2026. The site is hosted on GitHub Pages and served through Fastly, with a domain registered in 2014. The crawl picked up 5 technologies on this site, covering analytics, CDN, DNS providers, and hosting. The stack includes Fastly, GitHub Pages, and GoDaddy DNS.

For context, it's running the same core stack as 2,669 other launches.

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

6.6

StackScope Score

Good

82/100 Launch Readiness

Well prepared

0/6 Security Headers

Poor

3/3 Legal

Complete

2/2 Crawl files

Complete

64/100 Performance

Fair

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 (5)

Infrastructure

CDN	Fastly
DNS	GoDaddy DNS
Hosting	GitHub Pages

Analytics & Marketing

Analytics	Umami (2)
SEO	Google Search Console

Infrastructure

Network

FASTLY - Fastly, Inc., US

AS54113 · US

DNS

GoDaddy DNS

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 27 Jun 2026 to 25 Sep 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

12.3 years

Registered May 2014 · GoDaddy.com, LLC

Email Security

✗

SPF Not published. Your domain can be spoofed in phishing emails.

DKIM Not detected at common selectors. Your provider may use a custom one.

✗

DMARC Not published. Receivers fall back to permissive defaults.

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 (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

✓ Custom title and meta description

✓ Open Graph tags (title, image, description)

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Favicon present

⚠

Page title is 61 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

⚠

Meta description is 176 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

- Twitter card meta tags

- Semantic HTML (nav, main, article)

Performance How?

555 ms Server response

26% Faster than peers

952 ms Largest contentful paint

0.00 Cumulative layout shift

3.6 MB Page weight

3.6 MB Image weight

2 Third-party domains

0 Console errors

0 Failed requests

⚠ 11 images: 11 oversized, 11 without width/height

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

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 (10 URLs)

✗ security.txt

✗ llms.txt

✓ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

/privacy.html

✓ Terms of Service

/terms.html

? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).

Security Headers (0/6)

✗

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)

Build

2 JS files

1 CSS files

2 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.