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Kayston’s Forge is a privacy-first, browser-based developer utilities suite built with Next.js. All processing runs entirely client-side—your data never leaves your browser.

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What is Kayston’s Forge?

Kayston’s Forge provides 47 essential developer tools across seven categories:
  • Encoding & Encryption: Unix timestamps, JSON validation, Base64, JWT debugging, RegExp testing, URL encoding, certificate decoding
  • Escaping & Entities: HTML entities, backslash escaping, UUID/ULID generation
  • Preview & Comparison: HTML preview, text diff checker
  • Format Converters: YAML ↔ JSON, number base conversion, color conversion, cURL to code, hex ↔ ASCII
  • Code Beautifiers: HTML, CSS, JavaScript/TypeScript, ERB, LESS, SCSS, XML formatting and minification
  • Generators: Lorem Ipsum, QR codes, random strings, string inspection
  • Data Transformers: CSV ↔ JSON, hash generation, HTML to JSX, Markdown preview, SQL formatting, list operations, PHP serialization, and more

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Key Features

Privacy-First

All processing happens in your browser. No data is sent to external servers.

Keyboard-Driven

Command palette (Cmd/Ctrl+K), sidebar toggle (Cmd/Ctrl+1), and execution shortcuts (Cmd/Ctrl+Enter).

Tool History

Per-tool history stored in IndexedDB with restore and clear actions (max 50 entries per tool).

Offline-Ready

PWA manifest and service worker enable offline access after initial load.

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Tech Stack

Kayston’s Forge is built with modern web technologies:
  • Next.js 14 + React 18 + TypeScript (strict mode)
  • Tailwind CSS for styling with Solarized Light theme
  • Zustand for UI state management
  • Dexie for IndexedDB storage
  • Heroicons for iconography
The application is exported as a fully static site (output: 'export') and hosted on Vercel.

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Security & Privacy

Kayston’s Forge implements strict security headers (CSP, HSTS, X-Content-Type-Options) and undergoes automated security scanning with CodeQL SAST, npm audit, and TruffleHog secret detection.
All data processing is synchronous and runs in your browser’s JavaScript runtime. No telemetry, analytics, or external API calls are made.

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Architecture Overview

The tool system is driven by three core components:
  1. Registry (lib/tools/registry.ts) — Defines all 51 tools with metadata (id, name, category, icon, keywords)
  2. Engine (lib/tools/engine.ts) — Synchronous processing function with tool-specific logic
  3. Workbench (components/tools/ToolWorkbench.tsx) — Unified UI for all tools with input/output handling

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Get Started

Ready to use Kayston’s Forge? Follow the Quickstart guide to access the app and try your first tool.

Quickstart

Get from zero to using your first tool in under 2 minutes