We build refined software tools for developers and designers.
Haas Labs is an independent software product company founded by Luke Haas. We design and ship focused, well-crafted apps that help people do their best work.
About
A small studio with a simple goal: make tools we'd want to use ourselves.
Independent
We're a self-funded studio. That means we answer to the people who use our products, not to investors or advertisers.
Focused
We build a small number of products and look after them properly — with regular updates, real support, and attention to detail.
Crafted
Every product is designed and built in-house, with care given to performance, usability, and the small details that matter.
Products
The apps we make.
RunJS
A JavaScript & TypeScript playground for your desktop.
RunJS is a desktop playground that runs your code as you type, with instant results. It combines Node.js and browser environments with built-in npm support, so you can sketch ideas, test snippets, and explore libraries without setting up a project. Trusted by thousands of developers, educators, and learners.
- Real-time execution as you type
- Node.js and browser APIs
- Built-in npm package support
- TypeScript & modern JavaScript support
- Magic Comments & Logpoints
- Reusable snippet library
Irid
A design toolbar for Mac.
Irid brings essential design utilities together in one place, always a click away. Sample any color on screen, measure distances between elements, check spacing and alignment with grids, and pin your design on top of the live app for pixel-perfect comparison against your mockups.
- Screen-wide color picker
- Pixel measurement tools
- Alignment & spacing grids
- Design overlays for comparison
Contact & Support
Get in touch.
Questions about our products, support requests, or anything else — we'd love to hear from you. We aim to reply to every message.