Snapshots: Jul 31 discovery Jun 17 launch 7.4

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htmlbook

Your AI writes HTML — htmlbook keeps it. Capture documents from Claude Code, Cursor & Codex over MCP, organize them into a themed library, and share any page with a link. Read anywhere.

Developer Tools

Added June 17, 2026 · Last analysed June 17, 2026 · via · also on StackScope Discovery

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 17 June 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.

htmlbook has the basics covered well, with a thorough launch checklist, well-configured email security, and clean crawl signals. Visible gaps: no Permissions-Policy, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Product Hunt on June 17, 2026. The site is hosted on Vercel. Our crawler found 16 technologies on this site, covering advertising, social embeds, analytics, and auth. The stack includes Google Sign-In, Next.js, and React.

It's also on one of the most common stacks we track, shared by 14,981 launches 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 →

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 (16) · Indie stack

Infrastructure
DNS Cloudflare DNS
Hosting Vercel
Security HSTS
Build & Framework
Auth Google Sign-In
BaaS Firebase (2)
CSS framework Tailwind CSS
Font Google Fonts
Framework React
Meta-framework Next.js (2)
Package CDN jsDelivr
Video YouTube
Analytics & Marketing
Advertising Facebook Pixel (3)
Reddit Ads (2)
Analytics PostHog (3)
Social Facebook
Reddit

Infrastructure

Network
AS16509 · US
DNS
Cloudflare 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 9 Jun 2026 to 7 Sep 2026
Certificate as captured in this snapshot, not a live check.

Email Security

SPF -all Strict (-all). Strong.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
DMARC p=reject Reject (strict). Strong.
?
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 (10)

Cookies (3)
NameLifetimeDetected as
ph_phc_qPGzd2HbZUfMtbGWz7EeG2EAbYgG88jzBh2gebSxykU4_posthog 1y PostHog
_fbp 3mo Facebook Pixel
_rdt_uuid 3mo Reddit Ads
Local storage (3)
KeySizeDetected as
lastExternalReferrer 5 B -
lastExternalReferrerTime 13 B -
ph_phc_qPGzd2HbZUfMtbGWz7EeG2EAbYgG88jzBh2gebSxykU4_posthog 1 KB PostHog
Session storage (2)
KeySizeDetected as
ph_phc_qPGzd2HbZUfMtbGWz7EeG2EAbYgG88jzBh2gebSxykU4_posthog 2 B PostHog
ph_phc_qPGzd2HbZUfMtbGWz7EeG2EAbYgG88jzBh2gebSxykU4_primary_window_exists 4 B PostHog
IndexedDB (2)
DatabaseVersionDetected as
firebase-heartbeat-database 1 Firebase
firebaseLocalStorageDb 1 Firebase

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 69 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 185 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.

Performance How?

316 ms Server response
48% Faster than peers
1652 ms Largest contentful paint
0.00 Cumulative layout shift
3.8 MB Page weight
1 KB Image weight
5 Third-party domains
0 Console errors
0 Failed requests

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 onboarding signals +5
AI palette signals +5
AI writing signals +5
AI stack 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

Welcomes AI crawlers
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (57 URLs)
security.txt
llms.txt
ads.txt
humans.txt
? Privacy Policy not detected
? Terms of Service not detected
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
Detection works best on English language sites.

Security Headers (5/6)

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

Build

Code splitting
18 JS files
3 CSS files
5 Third-party domains

Brand Colours

App Manifest

htmlbook
display: standalone 3 icons
theme #b1573a
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.