Captionly

Add AI subtitles to any video in seconds. 100% free, no watermark, no signup. Whisper-powered, runs in your browser — files never leave your device. Export SRT, VTT, ASS or burn-in MP4.

reel-caption.vercel.app · Added June 8, 2026 · Last analysed June 8, 2026 · via · 60% unique tagline

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 8 June 2026; the live site may have changed since.

Captionly has the basics covered well, with a thorough launch checklist and clean crawl signals. What needs work: missing Permissions-Policy and X-Content-Type-Options, incomplete legal pages, and no email security records.

Launched on Product Hunt on June 8, 2026. The site is hosted on Amazon.com in the United States. Our crawler found 7 technologies on this site, covering ai api, CSS frameworks, frameworks, and hosting. The stack includes Next.js, React, and Tailwind CSS.

Notably, it's running the same core stack as 7,369 other launches and tighter on security headers than most Product Hunt launches.

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

6.9

StackScope Score

Good

100/100 Launch Readiness

Launch ready

4/6 Security Headers

Decent

0/3 Legal

Missing

2/2 Web Standards

Complete

94/100 Performance

Fast

Vibe Score 30 · Some AI signals

Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (7)

Infrastructure

Hosting	Vercel
Security	HSTS

Build & Framework

CSS framework	Tailwind CSS
Framework	React
Maps	Google Maps
Meta-framework	Next.js (2)

AI & Emerging

AI API	Hugging Face

Infrastructure

Network

AMAZON-02 - Amazon.com, Inc., US

AS16509 · US

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

SSL Certificate

Google Trust Services

Valid 28 Apr 2026 to 27 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)

✓ Twitter card meta tags

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Favicon present

✓ Semantic HTML (nav, main, article)

⚠

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.

⚠

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?

1339 ms Server response

7% Faster than peers

1997 ms Largest contentful paint

0.00 Cumulative layout shift

811 KB Page weight

80 KB Image weight

3 Third-party domains

0 Console errors

0 Failed requests

⚠ 12 images: 12 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.

Vibe Score Breakdown How?

Signal	Points
AI copy signals	+5
AI palette signals	+5
AI writing signals	+5
AI stack signals	+10
AI layout signals	+5

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

Content-Signal

? No directive declared

Link headers

? None advertised

Well-Known Files

✓ robots.txt

✓ sitemap.xml (330 URLs)

✗ security.txt

✓ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

? Terms of Service not detected

Detection works best on English language sites.

Security Headers (4/6)

✓

Referrer-Policy via <meta name="referrer">

✓

X-Frame-Options via CSP frame-ancestors

✗

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

✓ HTML minified

✗ CSS minified

✗ JS minified

✓ Code splitting

13 JS files

2 CSS files

3 Third-party domains

Brand Colours

App Manifest

Captionly

display: standalone 1 icon

theme #0a0a0a

video productivity utilities

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