I build small, honest developer tools that run entirely in your browser — real engines compiled to WebAssembly, no sign-up, no cookies, and zero data leaving your machine (open DevTools and check).
- JSON Formatter App — format, validate and transform JSON client-side: real jq 1.8 (WASM), JSONPath, diff, tree/table views, JSON→CSV/TypeScript/Python/Java/Rust/Go, and JSON Schema generate + validate
- RegexTester.dev — a free online regex tester running real regex engines via WebAssembly: PCRE2, RE2, ECMAScript, Python, Go, Java, .NET, and Rust
- Step-by-step pattern explainer and a backtracking debugger (with a flame graph of every backtrack step)
- An AI regex generator that turns plain English into patterns
- A community gallery of 14,000+ real-world patterns with permalinks
- A compatibility checker that flags where your pattern behaves differently across flavors
- SpeedPulse.tech — an honest internet speed test that measures what actually ruins your calls and gaming: bufferbloat and latency under load, not just raw Mbps
- Regex Flavor Matrix — which flavor supports lookbehind, atomic groups, recursion,
\K, and more - JSON Debugging Checklist — every common JSON error, its real cause, and the 30-second fix
- Internet Slow Checklist — why your internet feels slow even when speed tests look fine