Offline First
All processing happens on your device. No servers, no cloud dependencies. Your data never leaves your machine.
Opzozi
Dev
Privacy-First Developer
Building Chrome extensions that work offline. PDF tools, image converters, developer utilities—all processing happens on your device.
100% Offline
Privacy First
Open Source
Principles
Non-negotiable values for every project
Privacy First
No tracking, no analytics, no data collection. Your privacy is built into every decision.
Client-Side Only
Encryption happens in your browser using AES-256. Nothing gets uploaded, ever.
Open Source
All code is public. You can review it, verify it, and trust it—or build your own version.
About
I build Chrome extensions that solve real problems—offline. Simple VaultPDF handles PDF manipulation and OCR, Simple Image Converter fixes format compatibility issues, Tailwind Color Picker helps with color matching. Every tool processes data locally, works without internet, and respects your privacy. No cloud dependencies, no tracking, no compromises.
Frontend
- React
- Next.js
- TypeScript
- Tailwind CSS
- HTML5
- CSS3
Tools & Platforms
- Git
- Chrome Extensions
- Cloudflare Pages
- Vercel
- npm
Languages
- JavaScript
- TypeScript
- Python
Projects
Chrome extensions built with privacy and offline-first principles
Simple VaultPDF
Simple VaultPDF
Secure, local-first PDF manipulation Chrome extension. Edit, merge, split, extract text with OCR, and manage PDFs completely offline - no cloud required.
Chrome ExtensionPDF ManipulationOCRTesseract.jsLocal-First
Problem
Most PDF tools require cloud uploads, exposing sensitive documents. Users need multiple tools for editing, merging, splitting, and text extraction - creating workflow friction and privacy risks.
Solution
PDF manipulation extension that works locally. Edit pages, merge/split PDFs, extract text with OCR (Tesseract.js), save as images - all processing happens on your device. No cloud, no uploads, complete privacy.
Impact
PDF workflow in one tool, entirely offline. Users maintain full control over sensitive documents with zero privacy concerns. Multi-language OCR support included.
Simple Image Converter
Simple Image Converter
Lightweight Chrome extension that converts WebP, AVIF, and other formats to PNG/JPEG with a simple right-click. 100% offline, privacy-first.
Chrome ExtensionManifest V3Image ProcessingOffscreen API
Tech Stack
JavaScript
Canvas API
Offscreen API
Manifest V3
Problem
WebP and AVIF images are everywhere, but many tools don't support them. Photoshop CS6, some CMS platforms, and email clients can't handle these modern formats, causing broken displays and workflow interruptions.
Solution
Built a Manifest V3 Chrome extension using Offscreen API for efficient Canvas-based conversion. Right-click any image → convert to PNG/JPEG. Works completely offline with smart filename detection and multi-language support.
Impact
Fixes image compatibility issues with one click. Lightweight (~5-10 MB RAM), fast conversion, zero data collection. Multi-language support (EN/DE/HU) for global users.
Tailwind Color Picker
Tailwind Color Picker
Lightweight Chrome extension that picks colors from any webpage and instantly finds the closest matching Tailwind CSS class name. Fully offline, private, built with Manifest V3.
Chrome ExtensionManifest V3EyeDropper APIColor Science
Tech Stack
JavaScript
EyeDropper API
CIE Lab
DeltaE
Manifest V3
Problem
Designers and developers waste time manually matching colors to Tailwind classes. Converting HEX to Tailwind requires manual lookup or guesswork, slowing down development workflow.
Solution
Built a Chrome extension using EyeDropper API for pixel-perfect color picking. Uses CIE Lab color space and DeltaE (1976) distance calculation to find the nearest Tailwind class. Keyboard shortcut (Alt+C) for instant access, dual copy options (class name or HEX).
Impact
Instant color matching speeds up development. 100% offline, zero network requests, privacy-first. Modern UI inspired by Raycast and Linear. Pure vanilla JavaScript, no dependencies.