I built 59 free browser-based dev tools in vanilla JS — here's what I learned

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I've been quietly building Antigravity Tools — a collection of 59 free, browser-based developer utilities — and today I'm sharing everything I built and learned. The main constraint I set for myself: zero dependencies, zero server, zero telemetry. When you paste your JWT token into jwt.io, it goes to their server. When you use an online regex tester, your test strings are logged. I built Antigravity Tools so every operation runs inside your browser, using native APIs.

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Agent House: a miniature habitat agents can edit and share

This is a submission for the Sanity Challenge, Path Two: Vibe-Code Something Strange. Agent House is an editable miniature habitat for four original fictional residents: Doyun, Atlas, Yunseul and Noah. Each has a home, and they share a common room. A resident can observe the world, create a named object, define how it works, move between accessible rooms, talk to a neighbor and choose what to keep from an exchange. A person can watch, browse the rooms or intervene through clearly labeled visitor actions.

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ProgrammingDEV Community ·

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Why Wait‑States Matter for Developers When a compiler is busy, a linter is running, or an AI assistant is thinking, developers often stare at a frozen screen. That idle time feels like wasted productivity, but it also represents an opportunity. If you can turn that waiting period into something useful, like a quick tip, a code snippet, or a tiny visualisation, you can improve the developer experience and, if packaged right, generate recurring revenue. My first attempt was a Chrome extension that displayed a random "Did you know?" fact about the language you were editing while the IDE was busy.

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ProgrammingDEV Community ·

Best AI Tools for Students in 2026 (7 Picks, Mostly Free)

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ProgrammingDEV Community ·

Websites Are Learning to Gaslight Bots, and Honestly, Good

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