# Zqueezy

> Free, 100% client-side, multi-threaded WebAssembly (WASM) offline image compressor and batch optimizer by Zoviny Studios. Zero server uploads, total privacy, and complete Progressive Web App (PWA) offline capability.

## Overview & Core Philosophy
Zqueezy is a privacy-first web application engineered as a modern, high-performance successor to tools like Squoosh. It allows photographers, web designers, software developers, and privacy-conscious users to compress, resize, quantize, and inspect images directly within their browser without sending a single byte to external cloud servers. All computations run in isolated WebAssembly background threads on the user's local hardware.

## Core Capabilities
- **100% Client-Side WebAssembly (WASM)**: Encodes WebP, AVIF, MozJPEG, and PNG locally using Google Chrome Labs Squoosh-grade codecs.
- **Zero Cloud Uploads**: Complete GDPR and CCPA compliance. Zero telemetry, zero external logging, zero cloud processing.
- **Dual-Channel Split Comparison**: Interactive real-time split-screen comparison slider with 100% zoom, pixel panning, and multi-touch pinch gestures.
- **Bulk & Batch Queue Optimization**: Process dozens of images simultaneously, apply unified or customized compression profiles, and export all results in a packaged ZIP archive.
- **Progressive Web App (PWA)**: Installable as a standalone native-feeling application on Android, iOS Safari, Windows 11/10, macOS, Linux, and Chromebooks. Runs 100% offline in Airplane Mode.
- **Floating Scroll Joystick**: Dedicated touch-friendly navigation joystick designed specifically for mobile and tablet touchscreens.
- **Presets & Parameter Sync**: Save custom encoding presets to browser local storage, and clone parameters bidirectionally between Left and Right comparison channels.

## Supported Formats & Codecs
- **WebP**: Modern web graphics standard with lossy and lossless modes, near-lossless slider, alpha quality, and effort levels 1–6.
- **AVIF**: Next-generation AV1 image codec offering up to 90% size reduction over legacy JPEG while preserving high dynamic range and subtle gradients.
- **MozJPEG**: Advanced Mozilla JPEG encoder with trellis quantization, progressive scanning, and fine-tuned chroma subsampling.
- **PNG (Oxipng & Color Quantization)**: Lossless multi-pass optimization via Oxipng WebAssembly, paired with color palette quantization (2–256 colors) and Floyd-Steinberg / ordered dithering.

## Technical Documentation
- [Comprehensive Technical Manual & User Guide](https://zqueezy.zovinystudios.com/llms-full.txt): Complete documentation covering all user controls, codec settings, algorithms, keyboard shortcuts, and step-by-step PWA installation.
- [Agentic Resource Discovery Manifest (ARD)](https://zqueezy.zovinystudios.com/.well-known/ard.json): Standard ARD capability manifest for autonomous AI agent tool resolution.
- [Official Website](https://zqueezy.zovinystudios.com/): Launch the interactive Zqueezy web application.
- [XML Sitemap](https://zqueezy.zovinystudios.com/sitemap.xml): Machine-readable index of indexed routes and image metadata.
- [Studio Homepage](https://zovinystudios.com): Creator and developer of Zqueezy (Zoviny Studios).

## Optional & Secondary Links
- [Privacy Policy & Compliance](https://zqueezy.zovinystudios.com/llms-full.txt#privacy-compliance): Full legal and technical declaration of client-side privacy.
- [Mobile PWA Installation Guide](https://zqueezy.zovinystudios.com/llms-full.txt#pwa-installation): Instructions for installing on Android, iOS Safari, and Desktop.