# Dusyn Resize Image

> 100% free, privacy-first, in-browser image resizer and format converter tool by Dusyn. Process high-res JPG, PNG, WebP, GIF, and AVIF photos locally inside browser RAM without server uploads, accounts, or tracking.

## Core Capabilities
- **100% In-Browser Execution**: Uses HTML5 Canvas API and WebAssembly to process images locally inside browser RAM. Zero server uploads guarantee 100% privacy.
- **Batch Image Processing**: Resize, crop, downscale, compress, and convert multiple photos simultaneously.
- **Target File Size Compression**: Set custom target image sizes in KB or MB (e.g. compress 10MB photo to under 200KB) using binary-search quality tuning.
- **Format Conversion**: Convert between JPG, PNG, WebP, GIF, and AVIF formats with custom quality sliders (1-100%).
- **Lanczos-3 Resampling**: High-quality image resampling algorithm preventing pixelation or quality loss.
- **Preset Dimension Modes**: Includes Passport Photos (35x45mm / 2x2 in), Instagram Square (1080x1080), Instagram Story/Reel (1080x1920), YouTube Thumbnail (1280x720), Twitter Header (1500x500), LinkedIn Banner (1584x396), and Web Banners.
- **Instant ZIP Download**: Package and download all processed images in a single compressed .zip file.

## Web Application Pages & Specifications
- [Home Page](https://resize.dusyn.in/): Landing page with instant drag-and-drop resizer dropzone.
- [Resizer Workspace](https://resize.dusyn.in/resize-tool): Dedicated full-screen resizer workspace for batch processing, ratio locks, presets, and ZIP export.
- [Features](https://resize.dusyn.in/features): Detailed overview of client-side algorithms, browser compatibility, and privacy guarantees.
- [FAQ](https://resize.dusyn.in/faq): Frequently asked questions regarding browser memory, security, and supported formats.
- [About Dusyn](https://resize.dusyn.in/about): Information about Founder Dus Mamud and the privacy-first Dusyn Ecosystem (16+ apps).
- [Contact](https://resize.dusyn.in/contact): Support email (support@dusyn.in) and developer inquiries.
- [Privacy Policy](https://resize.dusyn.in/privacy): Official privacy policy detailing 0-data-retention and 0-server-upload architecture.

## Optional & Extended Documentation
- [Full LLMs Technical Specification](https://resize.dusyn.in/llms-full.txt): Complete detailed documentation for AI agents and LLMs.

## Technical Specifications
- **Input Formats**: JPEG, JPG, PNG, WebP, GIF, AVIF, SVG, BMP, ICO.
- **Output Formats**: JPEG, PNG, WebP, AVIF.
- **Memory Limit**: Up to 50MB per file (100% client-side RAM bound).
- **Publisher**: Dusyn Ecosystem (https://dusyn.in)
- **Founder & Architect**: Dus Mamud (https://x.com/beingdusmamud)
- **Blog**: DusynBlog (https://blog.dusyn.in)
- **License**: Free Web Application