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AltCaption

Generate concise image alt text, escape it safely, and copy a ready-to-use HTML alt attribute for CMS, static-site, or code updates.

Added August 24, 2026 · Last analysed August 24, 2026 · via Hacker News

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Screenshot of AltCaption

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

AltCaption has the basics covered well, with a thorough launch checklist and clean crawl signals. Visible gaps: missing several security headers, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Hacker News on August 24, 2026. The site is hosted on Hetzner Online GmbH in Germany, with a domain registered 5 months before launch. Our crawler found 10 technologies on this site, covering analytics, CSS frameworks, developer tools, and DNS providers. The stack includes Tailwind CSS, Vue.js, and Caddy.

It's also on one of the most common stacks we track, shared by 296 launches.

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

6.4
StackScope Score
Good
100/100 Launch Readiness
Launch ready
3/6 Security Headers
Decent
0/3 Legal
Missing
2/2 Crawl files
Complete
83/100 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 (10)

Infrastructure
DNS Cloudflare DNS
Server Caddy
Email
Business email Zoho Mail (2)
Build & Framework
CSS framework Tailwind CSS
Developer tools Vite
Framework Vue.js
UI library Lucide Icons
Analytics & Marketing
Analytics Clicky (2)
PostHog (4)
SEO Google Search Console

Infrastructure

Network
HETZNER-CLOUD2-AS - Hetzner Online GmbH, DE
AS213230 · DE
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 25 Jul 2026 to 23 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
5 months
Registered Mar 2026 · NameCheap, 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 p=none None (p=none). Monitoring only.
?
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 (1)
NameLifetimeDetected as
ph_phc_8lj9eBfJqOnpHU4zeClIfL9yIS2RZ7SFAqOn0vSJkuW_posthog 1y -
Local storage (1)
KeySizeDetected as
ph_phc_8lj9eBfJqOnpHU4zeClIfL9yIS2RZ7SFAqOn0vSJkuW_posthog 3.3 KB PostHog
Session storage (3)
KeySizeDetected as
ph_phc_8lj9eBfJqOnpHU4zeClIfL9yIS2RZ7SFAqOn0vSJkuW_posthog 389 B PostHog
ph_phc_8lj9eBfJqOnpHU4zeClIfL9yIS2RZ7SFAqOn0vSJkuW_primary_window_exists 4 B PostHog
ph_phc_8lj9eBfJqOnpHU4zeClIfL9yIS2RZ7SFAqOn0vSJkuW_window_id 38 B PostHog

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)

Performance How?

398 ms Server response
43% Faster than peers
2828 ms Largest contentful paint
0.05 Cumulative layout shift
422 KB Page weight
3 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.

AI Stance

Welcomes AI crawlers
✓ 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 (21 URLs)
✗ security.txt
✓ llms.txt
✗ ads.txt
✓ humans.txt

Legal

? 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 (3/6)

✓
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
8 JS files
1 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.