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readme_en.md

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+# img2webp-cli
+
+A command-line tool for converting all images in the current directory to WebP format, featuring recursive subdirectory processing and quality selection options, using WASM for processing.
+
+[English](./readme_en.md)
+[中文](./readme.md)
+
+## Installation
+
+npm:
+```bash
+npm install -g img2webp-cli
+```
+
+yarn:
+```bash
+yarn global add img2webp-cli
+```
+
+## Usage
+
+* Quick use:
+
+Execute in the image directory:
+
+```bash
+cp2webp
+```
+
+* Custom use:
+
+```bash
+cp2webp -i <input_directory> -o <output_directory> -q <quality> -r <recursive> -a <alpha>
+```
+
+### Command Line Options
+
+- `-i, --input <path>`: Specify input directory, defaults to current directory `./`
+- `-o, --output <path>`: Specify output directory, defaults to `./output`
+- `-q, --quality <number>`: Specify compression quality, range 1-100, defaults to 60
+- `-r, --recursive <number>`: Whether to process subdirectories recursively, defaults to 0 (no recursion)
+- `-a, --alpha <number>`: Whether to preserve alpha channel, 1 to preserve, 0 to discard, defaults to 1
+- `-h, --help`: Display help information
+
+## Example
+
+To convert images in `/path/to/input` directory to WebP format and output to `/path/to/output` directory:
+1. Navigate to the image directory
+```bash
+cd /path/to/input
+```
+2. Execute command
+```bash
+cp2webp
+```
+or
+
+Execute from any directory
+```bash
+cp2webp -i /path/to/input -o /path/to/output -q 60 -r 1 -a 1
+```
+
+## Notes
+
+- Supported image formats include JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC, and other common formats (for specific supported formats, please check [stb_image](https://github.com/nothings/stb))
+- By default, the output directory will create a subdirectory named `output` under the specified output path
+- Maximum recursive processing depth is limited to 5 levels to avoid excessive recursion and unexpected issues
+
+## Acknowledgments
+
+- [stb_image](https://github.com/nothings/stb)
+- [libwebp](https://chromium.googlesource.com/webm/libwebp)
+WASM packages include [stb_image](https://github.com/nothings/stb) and [libwebp](https://chromium.googlesource.com/webm/libwebp). Thanks to the authors and teams.
+
+## License
+
+MIT
+
+Translated by Claude-3.5-sonnet-20241220