thedevbox
Privacy-first developer utilities that process data locally in the browser
A production-oriented collection of formatting, conversion, generation, and inspection tools designed around local execution, zero tracking, and a contributor-friendly extension system.
The 15-second brief
At a glance
- Outcome
- Replaces scattered single-purpose utility sites with one fast workspace that requires no account and keeps sensitive pasted data on the user's device by default.
- Delivery
- Shipped, 2026
- Focus
- Frontend, Web
- Scope
- 8 core technologies
Ownership and evidence
What I built
The product decisions and engineering work that shaped the final result.
Delivered browser-first tools for structured-data formatting, URL inspection, timestamp and encoding conversion, identifier generation, and common debugging tasks.
Made local processing the default architecture so pasted payloads do not leave the browser unless a tool explicitly requires server-side execution.
Built the application on Next.js 16 and React 19 with strict TypeScript, automated tests, and a consistent component system.
Created a scaffold command that generates the component, shared logic, tests, registry entry, and mappings required for a new tool.
Enforced formatting, linting, tests, and type safety through Biome, Vitest, Lefthook, and pnpm-based workflows.
Product evidence
See it in action
Interface views and demonstrations from the working product.
Visual assets are not published for this project. The verified delivery and engineering scope are documented above.