Snapshots: Jul 23 discovery – May 3 launch 5.6

React Playground

Practice React with real execution-based challenges.

Education

Added May 3, 2026 · Last analysed May 3, 2026 · via · also on StackScope Discovery

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 3 May 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.

React Playground covers some of the launch checklist, with fast page loads and clean crawl signals. Worth fixing first: missing several security headers, incomplete legal pages, and no email security records.

Launched on Product Hunt on May 3, 2026. The site is hosted on Vercel and served through Cloudflare. Our crawler found 11 technologies on this site, covering CDN, CSS frameworks, developer tools, and DNS providers. The stack includes Tailwind CSS, Cloudflare, and Cloudflare DNS.

It's also running the same core stack as 3,366 other launches.

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

5.6

StackScope Score

Fair

61/100 Launch Readiness

Well prepared

1/6 Security Headers

Poor

2/3 Legal

Partial

2/2 Crawl files

Complete

Vibe Score 25 · Some 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

CDN	Cloudflare (3)
DNS	Cloudflare DNS
Hosting	Vercel (2)
Protocol	HTTP/3 (2)
Security	HSTS (2)

Email forwarding	Cloudflare Email Routing (2)
Transactional email	Mailgun

Build & Framework

CSS framework	Tailwind CSS
Developer tools	Vite
Package CDN	jsDelivr (2)

Analytics & Marketing

SEO	Google Search Console

Infrastructure

Network

CLOUDFLARENET - Cloudflare, Inc., US

AS13335 · US

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 1 May 2026 to 30 Jul 2026

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

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) (partial) missing og:image

✓ Responsive viewport meta tag

✓ Favicon present

⚠

Page title is 65 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

- Canonical URL declared

- Twitter card meta tags

- Semantic HTML (nav, main, article)

Vibe Score Breakdown How?

Signal	Points
AI CSS signals	+10
AI palette signals	+5
AI asset signals	+10

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

Blocks AI crawlers

✗ llms.txt published

✗ 9 AI bots blocked in robots.txt

Content-Signal

✗ ai-train = no

✓ search = yes

? ai-input (not declared)

Link headers

? None advertised

Well-Known Files

✓ robots.txt

✓ sitemap.xml (2 URLs)

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

/privacy-policy

? Terms of Service not detected

90% unique

Security Headers (1/6)

✗

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)

Performance

116ms response time

Faster than 81% of sites

1 third-party domains loaded

Build

✓ Code splitting

11 JS files

2 CSS files

1 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.