Core principle
Local-first
Tools run directly in your browser. No server. No upload. Offline-friendly wherever practical.
Zero trust development utilities
Useful tools that stay on your machine.
Focused browser-based utilities for developers, makers, and privacy-minded people who would rather not paste their work into random online tools.
// Local-first by default input : your code, links, text action: clean, convert, format output: stays on your machine // No account. No upload. // No surprise.
About
Small tools, serious boundaries.
Some online utilities are convenient, but convenience shouldn't require handing over private code, customer text, internal links, or unfinished work. ZTDev.us is a growing library of practical tools that run entirely in your browser.
Core principle
No accounts needed
Utility software shouldn't require a login just to format code, build a QR code, or clean up text.
Core principle
Built for normal people
Powerful enough to be useful, simple enough that you don't need a manual before getting value out of it.
Principles
The operating idea.
Zero trust doesn't have to be dramatic. It can simply mean choosing tools that minimize exposure, reduce dependency, and keep your work under your control.
01
Assume less
Don't assume every free web tool is harmless. Reduce the amount of sensitive material you share with external services in the first place.
02
Prefer transparent tools
Single-purpose utilities are easier to understand, easier to inspect, and easier to run locally. Complexity hides risk.
03
Keep useful things boring
The best utility tools do the job cleanly without dashboards, dark patterns, or feature bloat that serves the product, not the user.
Most used tools
Popular starting points.
A few tools people reach for most. Everything runs on your device — nothing is sent anywhere.
Password Generator
Generate strong, random passwords using your browser's cryptographic engine. Nothing leaves your device.
Private Note
Lock text with a password using AES-256 encryption. The locked output is safe to share anywhere.
QR Code Maker
Create styled QR codes for websites, Wi-Fi, contacts, and more. Export as PNG or SVG.
Link Inspector
Decode, inspect, and strip tracking parameters from any link before you click it.
Browse all tools →
17 tools available — more coming
Have a tool idea?
ZTDev.us is built around practical utilities people actually need. If a tool involves private work, sensitive text, or local convenience, it may belong here.