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DarkenAmber
DarkenAmber

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I built 36 offline IT/security tools in a single HTML file (no npm, no backend, no tracking)

#opensource #javascript #security #networking


I'm an engineer from Baku. I build things as a hobby.

I got tired of opening 5 different sites every time I needed to check
a certificate, calculate subnets, or encrypt something. Each one had
ads, wanted my email, and made me wonder where my data went.

So I started building. One tool. Then another. 36 tools later — here we are.

The unusual part

It's a single HTML file. 460KB. No npm. No build step. No server.

open index.html
Enter fullscreen mode Exit fullscreen mode

That's the entire setup. Works offline, works on any machine.

What's inside

The usual stuff — JSON, JWT, Base64, UUID, QR codes, Regex.

But also things I haven't seen elsewhere as offline tools:

  • Packet Analyzer - paste Wireshark hex dump, get full protocol breakdown
  • CIDR Aggregator - merge subnets, export as Cisco ACL or iptables
  • Config Diff - syntax-aware diff for Cisco IOS, Juniper, nginx
  • HTTP Headers Analyzer - security grade A+ to F
  • AES-GCM encryption, SSH/RSA keys - all via Web Crypto API

Honest note

Built with heavy AI assistance (Claude). My ideas, my decisions,
my testing. Claude wrote the code. Being upfront about this.

Links

Demo: https://darkenamber.github.io/DarkenAmber-it-tools
GitHub: https://github.com/DarkenAmber/DarkenAmber-it-tools

Feedback welcome.

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