uDocumentViewer

Free in-browser viewers for 200+ file formats: PDFs, images, 3D models, ebooks, spreadsheets, code, archives, scientific data, and more — opened privately on your device, no upload, no tracking.

Productivity

Added July 13, 2026 · Last analysed July 13, 2026 · via · 56% 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 13 July 2026; the live site may have changed since.

uDocumentViewer looks production-ready overall, with a thorough launch checklist and clean crawl signals. Worth fixing first: missing several security headers, incomplete legal pages, and no email security records.

Launched on Product Hunt on July 13, 2026. The site is served through Cloudflare, with a domain registered 6 weeks before launch. We've detected 8 technologies on this site, covering ui library, CDN, CSS frameworks, and DNS providers. The stack includes Next.js, React, and Tailwind CSS.

It's running the same core stack as 3,693 other launches.

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

6.7

StackScope Score

Good

100/100 Launch Readiness

Launch ready

1/6 Security Headers

Poor

2/3 Legal

Partial

2/2 Crawl files

Complete

90/100 Performance

Fast

Vibe Score 15 · Few 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 (8)

Infrastructure

CDN	Cloudflare
DNS	Cloudflare DNS

Build & Framework

CSS framework	Tailwind CSS
Framework	React
Meta-framework	Next.js (6)
UI library	Lucide Icons
UI library	shadcn/ui

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 27 May 2026 to 25 Aug 2026

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

Domain Age

1 month

Registered May 2026 · Cloudflare, Inc.

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 (1)

Cookies (1)

Name	Lifetime	Detected as
NEXT_LOCALE	session	-

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)

⚠

Meta description is 194 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?

206 ms Server response

70% Faster than peers

816 ms Largest contentful paint

0.00 Cumulative layout shift

2.5 MB Page weight

1 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?

Signal	Points
AI CSS signals	+10
AI writing 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

No AI stance declared

✗ 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 (358 URLs)

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

/privacy

? Terms of Service not detected

92% unique

Security Headers (1/6)

✓

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

✗

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

31 JS files

4 CSS files

1 Third-party domains

App Manifest

uDocumentViewer

display: standalone 2 icons

theme #00E676

utilities productivity

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