Tools that actually do the job
Browser utilities that run entirely on your device — nothing you paste leaves your machine —
plus a curated directory of external tools used daily.
Quick tools
- JSON formatter — validate, format and minify JSON.
- Base64 converter — encode and decode UTF-8 text.
- Timestamp converter — Unix, ISO, local and UTC time.
- Secure generator — UUIDs and strong passwords with browser cryptography.
- UK VAT calculator — add or extract VAT at any rate.
- Text cleaner — count, re-case, deduplicate, sort and trim.
- SHA-256 generator — local text fingerprint with Web Crypto.
- URL cleaner — remove common tracking parameters.
- Playground — JWT decoder, regex tester, JSON→TS, cron explainer and more.
Enable JavaScript to use the interactive utilities on this page.
Curated directory
### start
- Slime Factory Tycoon 🟢 (https://github.com/DLinacre/slime-factory-tycoon) — Roblox tycoon source template. Not offered here as a playable game.
- AeroFlap 🚀 (https://LIN4CRE.github.io/AeroFlap/) — Cyberpunk arcade flight game — 10 character mechs, customizable obstacle physics, biometric passkeys, and synthesized Web Audio.
- Circuit 🔌 (/games/circuit) — Rotate every wire until the whole grid lights up — procedural puzzles with a shared daily grid and par.
- Decrypt 🔓 (/games/decrypt) — Crack a four-symbol code in eight guesses — pure deduction with a daily streak and challenge links.
- Pulse 🫀 (/games/pulse) — Repeat the signal, one step longer each round — solo memory game or pass-and-play duel.
- Trigger ⚡ (/games/trigger) — Two-player reflex game on one phone — green means go, amber is a trap. First to five wins.
- Gridlock 〰️ (/games/gridlock) — Draw a line, close a square, go again — pass-and-play or take on a chain-aware AI.
- FaceRater AI ✨ (https://ai-face-rater-next.vercel.app) — Neutral aesthetic face scoring & instant AI reasoning card with shareable TikTok/Instagram 1080x1350 layouts.
- Pixel Heist 🚨 (https://dlinacre.github.io/pixel-heist/) — Cyberpunk stealth heist arcade game built with React 19 & Phaser 3. Procedural neon vaults, guard AI, laser grids & HMAC high scores.
- Grumpy Guy AI ಠ_ಠ (https://dlinacre.github.io/grumpy-guy-ai/) — Your disagreeable AI copilot — motivation, with complaints. Reality checks with custom tones & speech synthesis.
- PokéFlip AI (https://pok-flip-ai.vercel.app) — Real-time arbitrage, high-frequency card flipping & predictive TCG valuation engine powered by Gemini.
- Nic's Food Decider (https://nic-food-decider.vercel.app) — One-click decision engine for dinner — cook or takeaway with weighted preferences & dietary filters.
- PayHip Scraper (https://payhipscraper-production.up.railway.app) — Digital product intelligence for Payhip: live marketplace scraping, deterministic scoring & Arena.ai prompts.
- Personal OP Agent (/tools/opagent.html) — Zero-setup client-side AI workspace & prompt controller. Runs 100% in your browser.
- Arena Audit Prompt Builder (https://dlinacre.github.io/a-audit/) — Universal browser audit prompt generator for engineering, UX, security, and performance reviews.
- Android APK Launch Hub (/tools/apk-hub.html) — Quick launcher and download index for David's Android utilities and debloat tools.
- VS Code (https://code.visualstudio.com) — Gold-standard code editor with essential TypeScript, Git, and React extensions.
- GitHub (https://github.com/DLinacre) — Version control, open-source portfolio hosting, Actions CI/CD, and release management.
- Git (https://git-scm.com) — Fundamental CLI version control tool for tracking commits, branches, and releases.
### build
- React (https://react.dev) — Modern component-based UI library powering interactive browser tools and SPAs.
- Vite (https://vitejs.dev) — Lightning-fast dev server and frontend build tool with hot module replacement.
- Tailwind CSS (https://tailwindcss.com) — Utility-first CSS framework for rapid responsive layouts and consistent styling.
- Python (https://python.org) — Versatile language used for backend services, automation scripts, and CLI toolchains.
- Kotlin & Android SDK (https://developer.android.com) — Native Android development for utilities like Linacre Uninstaller and DKMA Monster.
- Dexie / IndexedDB (https://dexie.org) — Local-first browser database wrapper for fast offline storage without backend dependence.
### deploy
- Vercel (https://vercel.com) — Global edge hosting platform with automated GitHub deployment previews and SSL.
- GitHub Pages (https://pages.github.com) — Free static hosting directly from GitHub repositories for web guides and games.
- Cloudflare (https://cloudflare.com) — DNS management, edge workers, and CDN caching for domain performance.
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