Lab of PDF
Free online PDF tools to merge, split, compress, watermark, and convert PDFs. All processing happens in your browser — no uploads, no limits, no sign-up.
Added July 26, 2026
· Last analysed July 26, 2026 · via 
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 26 July 2026; the live site may have changed since.
Lab of PDF scores highly overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Visible gaps: missing several security headers and no email security records.
Launched on Product Hunt on July 26, 2026. The site is hosted on DigitalOcean in the United States, with a domain registered 3 days before launch. Our crawler found 11 technologies on this site, covering javascript library, analytics, CSS frameworks, and developer tools. The stack includes Tailwind CSS, Cloudflare DNS, and Google Fonts.
It's also on one of the most common stacks we track, shared by 6,297 launches.
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Tech Stack (11)
| DNS |
Cloudflare DNS
|
| OS |
Ubuntu
|
| Server |
nginx
|
| CSS framework |
Tailwind CSS
|
| Developer tools |
Vite
|
| Font |
Google Fonts
|
| JavaScript library |
PDF.js
|
React Router
|
|
| UI library |
Lucide Icons
|
| Analytics |
Umami
|
| SEO |
Google Search Console
|
Infrastructure
Email Security
Storage (1)
| Key | Size | Detected as |
|---|---|---|
| panda-visitor-counted | 1 B | - |
Readiness Breakdown How?
Performance How?
⚠ 1 images: 1 oversized, 1 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 palette signals | +5 |
| AI writing signals | +5 |
| Implausible social-proof claim | +15 |
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.