Who we are
Built by developers.
For the team of one.
Queldrex LLC is a developer tools company based in Castle Rock, Colorado. We started because we kept paying enterprise prices for tools we used twice a month — or skipping them entirely because they were too expensive or too slow to set up.
So we built the toolkit we wished existed: professional tools that work the second you open them, with no account, no trial period, and no sales call required.
Why Queldrex exists
You're not just a developer.
You're everything.
Security team. Legal department. DevOps. Finance. We build the tools for the person who has to be all of them.
🔒
You need a security audit.
A real pentest costs $5,000. You need to know if your package.json is a liability before Tuesday.
The Queldrex fix
CVE scanner, dependency checker, vibe security scan — run them in 30 seconds.
📝
You need a legal document.
A lawyer charges $400/hr. You need an NDA for a new client call tomorrow morning.
The Queldrex fix
NDA generator, ToS builder, refund policy — clean output, no attorney required.
🌐
Your email deliverability is broken.
Your cold outreach is going to spam. You have no idea if it's DMARC, SPF, or MX.
The Queldrex fix
DNS health checker, email deliverability scanner — know exactly what's wrong in 10 seconds.
See it work
Live DNS health check — runs fresh every page load
The toolkit
48 tools across 4 categories
Every tool free to start. Go Pro for unlimited access.
Dependency CVE Scanner
ProPaste your package.json. Get live CVEs from Google's OSV database in seconds.
SSL/TLS Inspector
FreeReal TLS handshake analysis — cert expiry, cipher grade, and security headers.
NDA Generator
ProMutual or one-way NDAs with governing law, term, and scope — ready in under a minute.
Break-Even Calculator
FreeEnter your costs and price. Know exactly how many units you need to sell.
Invoice Fraud Detector
ProFlags BEC email patterns, round-number manipulation, and urgency pressure tactics.
DNS Health Checker
FreeLive DNS lookup across Cloudflare and Google resolvers — A, MX, TXT, NS, CAA records.
Pricing
Start free. Upgrade when you need more.
Most developers never hit the free limits. Pro is there when they do.
Free
No account. No card. Open a tool and go.
- All 48 tools, free tier
- 3–10 uses per tool per day
- No account required
- Instant results
Pro
Most PopularEvery tool. No limits. Cancel anytime.
- All 48 tools, unlimited use
- New tools added regularly
- Every category included
- 7-day full refund guarantee
- Cancel from Stripe portal anytime
Need white-label reports and 25 client scans per month? View Agency plan →