Fast, private browser-based developer tools
We make everyday developer and file tasks instant — without sending sensitive data to a server. Paste, transform, copy. Your data never leaves your tab.
Free, no login
Open the tool and get to work. No accounts, no paywall for core.
Browser-first
Clipboard, File, Blob, Crypto APIs on your device. No upload.
Privacy
“Your data stays in your browser” is architecture, not marketing.
Fast & light
Static Next.js on Cloudflare Pages. Minimal JS, heavy libs lazy-loaded.
Accessible
Keyboard, Tab indents, Cmd+Enter, 100dvh panels, mobile stacked.
Offline-ready
After first load, formatting works offline. No lock-in.
Why start with JSON?
JSON is the lingua franca of APIs. Every developer pastes a response into a formatter. We nailed that workflow — left Input, right Formatted/Tree/Minified, 2/4/Tab, Sort, Search, drag-drop, `⛶ Enlarge`, `💾 Save` — so the same shell scales to 20+ tools.
At a glance
- Panels — 100dvh, divider ↔, height auto
- Tabs — Formatted, Tree, Minified (wrapped)
- Keep — 500ms debounce to localStorage
Architecture
UI → Tool Controller → Tool Engine → Result
↓ ↓
React components TypeScript today
Rust/WASM tomorrow
(only where profiling shows benefit)Engines are isolated from UI — testable, swappable. ProcessingEngine<I,O> in src/lib/engine.ts.
Future image/PDF WASM lives in packages/*-engine-wasm and loads only when that tool opens.
Business — long-term trust over ad density
Useful tool → search traffic → satisfaction → more tools → more pages → traffic → ads → premium later (batch, CLI, API). Optimized for repeat use, not interstitials.