QR Penguin

Generate free QR codes. Customise qr codes with patterns, eyes, paint, backgrounds and more!

Developer Tools

Estimated origin: United Kingdom

Added August 21, 2026 · Last analysed August 21, 2026 · via

Own this Launch?

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 21 August 2026; the live site may have changed since.

QR Penguin scores highly overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Visible gaps: no Permissions-Policy, tracking cookies set before any opt-in, and incomplete email security.

Launched on Product Hunt on August 21, 2026. The site is hosted on Hostinger International Limited in Cyprus, with a domain registered in 2023. The crawl picked up 19 technologies on this site, covering advertising, analytics, backend framework, and CSS frameworks. The stack includes Bootstrap, Stimulus, and Cloudflare DNS.

For context, it's one of just 4 launches we've crawled on this exact stack and more locked down than the typical Product Hunt launch.

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

9.1

StackScope Score

Excellent

84/100 Launch Readiness

Well prepared

5/6 Security Headers

Strong

3/3* Legal

Complete*

2/2 Crawl files

Complete

92/100 Performance

Fast

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 (19)

Infrastructure

DNS	Cloudflare DNS
Security	HSTS
Server	nginx

Email forwarding	Cloudflare Email Routing (2)

Build & Framework

CSS framework	Bootstrap medium
Font	Font Awesome Pro
Framework	Stimulus medium
Icon font	Font Awesome
JavaScript library	Hotwire Turbo
Maps	Leaflet medium
Package CDN	JSPM CDN
UI library	Material Design Lite

Analytics & Marketing

Advertising	Google Ads (2)
Analytics	Google Analytics (4)
SEO	Google Search Console
Tag management	Google Tag Manager (2)

Commerce & Payments

Payments	Stripe

Business Tools

Error tracking	Sentry

Other

Backend framework	Rails (2)

Infrastructure

Network

AS-HOSTINGER - Hostinger International Limited, CY

AS47583 · CY

DNS

Cloudflare DNS

Authoritative nameserver

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

Green hosting

Green hosted

Host runs on renewable energy. Data from The Green Web Foundation.

SSL Certificate

Let's Encrypt

Valid 18 Aug 2026 to 16 Nov 2026

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

Domain Age

2.9 years

Registered Sep 2023 · Cloudflare, Inc.

Email Security

✓

SPF ~all Soft-fail (~all). Common and accepted.

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 (5)

Cookies (4)

Name	Lifetime	Detected as
_ga	1y	Google Analytics
_ga_LCV8NYBJWH	1y	Google Analytics
_gcl_au	3mo	Google Ads
_session_id	13d	-

Local storage (1)

Key	Size	Detected as
_gcl_ls	277 B	Google Ads

Readiness Breakdown How?

✓ Custom title and meta description

⚠

Open Graph tags (title, image, description) (partial) missing og:image

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Favicon present

✓ Semantic HTML (nav, main, article)

- Twitter card meta tags

Performance How?

264 ms Server response

54% Faster than peers

504 ms Largest contentful paint

0.06 Cumulative layout shift

1.6 MB Page weight

366 KB Image weight

4 Third-party domains

0 Console errors

0 Failed requests

⚠ 120 images: 6 oversized, 18 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 (24 URLs)

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

/privacy-policy

✓ Terms of Service

/terms-of-service

? Consent manager not detected

Analytics set tracking cookies on our visit, with no opt-in step.

68% unique

Mentions:

Cookies DPO Updated: 03/09/2023

Security Headers (5/6)

✓

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

✓ Code splitting

4 JS files

3 CSS files

4 Third-party domains

Brand Colours

App Manifest

QR Penguin

display: standalone 2 icons

theme #c3c0ff

business personalization meproductivitydical utilities

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