Control your data with local dev utilities
Offline utilities for developers. Data you enter into the desktop tools stays on your machine.
{
"sub": "user_12345",
"name": "Alex Chen",
"role": "admin",
"iat": 1704067200
}Local tools for your AI agent
Ask your agent to check a JWT, format JSON or convert a timestamp. The Rust CLI reads your clipboard and runs the tool on your computer, so you do not need to paste the input into chat.
Eight skills cover JWT, JSON, encoding, text, time, colors, URLs and Git. Install them in agents that support Agent Skills, including Claude Code and Codex. The desktop app is optional.
“Check whether the JWT on my clipboard has expired.”
Sensitive results stay in local files by default. Requested findings and results you choose to share can still enter the agent’s chat context.
Install the skills
npx skills add darraghoriordan/localdevtools-skills -gThen ask your agent to set up the LocalDevTools CLI. Setup downloads a verified binary if needed; tool commands run locally. Requires Node.js 20+ and a desktop session for clipboard access. Available for macOS, Windows and Linux on x64 and ARM64.
View skills on GitHubWhat's included
All your dev tools in one place
Encoders, decoders, tailwind colors, git repository tools, time wrangling tools, string tools and more. All in one place.
Powerful Local AI tools
Our AI tools support any local LM Studio models, or bring your own AI API key
Universal license
Choose a license for 5, 10, or 20 Mac and Windows computers.
Shared source
Dev tools is shared source, purchasers can view and contribute on GitHub.
What are Local Dev Tools?
Local dev tools are a collection of safe, offline utilities for developers. You can paste in your company's or client's data safely into tools for tasks like JWT decoding, list sorting and uri encoding.
The tools work offline so you can use your business data with confidence rather than using random websites or sending your data to AI companies. The tools work on both Mac and Windows.
We support offline, secure local AI with LM studio. If you chose to, you can use your own API keys for cloud AI (e.g. OpenAI/Google) and never transmit data to a UseMiller server.
Download Local Dev Tools (v1.74.4)
Download the free trial. Buy a license later if it earns a place in your workflow. Source available on Github.
Everything you get
- Offline encoding and decoding tools for base64, JWT and JSON
- Use local AI models in tools built specifically for developers
- Save $1000's with an AI powered Marketing tool for builders and busy engineers
- A color converter with 'nearest tailwind color' and harmonious colors feature
- Encoders and decoders for Html and CSS Unicode characters, uri components
- A git url parser and generator that is aware of your local ssh aliases
- A git repo summary tool to verify user name is consistent across ssh alias related repos (work vs personal)
- A tool to quickly parse and map timestamps in different formats, local and UTC
- String tools - A case converter and an internationalisation aware string sorter
Buy once, use forever.
Choose the number of computers you need. Prices are in USD and the app remains usable after the update period ends.
- Mac and Windows desktop apps
- Perpetual license with 1 year of updates
- 30-day money-back guarantee
$29
5 computers
$49
10 computers
$79
20 computers
Gumroad handles payment and emails your license key. Existing customers keep their current license terms.
Still not sure? Feel free to ask me any questions on Twitter - @darraghor