Improve README

Author: abra-code

README.md

@@ -1,9 +1,41 @@
-# Sips.app  
-![Sips Icon](Icon/Sips-macOS-128x128@2x.png)  
+# Sips.app
 
-Sips is an app for batch conversion of images.  
-It uses built-in macOS command-line tool `sips`  
+![Sips Icon](Icon/Sips-macOS-128x128@2x.png)
 
-Sips.app is built with OMC 5.0 engine and ActionUI:  
-https://github.com/abra-code/OMC/  
-https://github.com/abra-code/ActionUI/  
+A native macOS applet for batch image conversion and resizing. Wraps the built-in macOS `sips` command-line tool in a SwiftUI interface with real-time preview.
+
+Built with **OMC 5.0** engine — [github.com/abra-code/OMC](https://github.com/abra-code/OMC/)  
+UI rendered by **ActionUI** — [github.com/abra-code/ActionUI](https://github.com/abra-code/ActionUI/)
+
+## Features
+
+- **Batch conversion** of multiple images in one go
+- **Drag & drop** files or folders onto the app to populate the file list
+- **Recursive folder scanning** for supported image types
+- **Real-time preview** of resize, rotation, and flip settings
+- **20+ output formats** dynamically queried from macOS `sips`
+- **5 resize modes**: Exact Pixels, Percentage, Width, Height, Longest Edge
+- **Rotation**: 0°, ±90°, ±180°, ±270°
+- **Flip**: Horizontal, Vertical, or None
+- **Quality control** for lossy formats (1–100)
+- **Compression options** for applicable formats (e.g. TIFF LZW/PackBits)
+- **File info** panel with image dimensions, file size, and dates
+- **Overwrite protection** — optionally skip existing output files
+
+## Supported Formats
+
+Output formats are discovered at launch from the system `sips` command. Typical formats include:
+
+JPEG, PNG, TIFF, GIF, BMP, HEIC, HEICS, WebP, PSD, PDF, JPEG 2000, ICNS, AVIF, DNG, ICO, DDS, EXR, ASTC, KTX, PBM, PVR, TGA
+
+## Requirements
+
+- **macOS 14.6+**
+
+## Usage
+
+1. Launch `Sips.app` (or drop image files/folders onto it)
+2. Add images using the **+** button
+3. Select an image to see its preview and info
+4. Adjust resize mode, rotation, flip, output format, and quality
+5. Click **Convert** and pick a destination folder