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README.md

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-# png-meta-editor
+# PNG Metadata Editor
 
+A graphical tool for viewing and editing metadata in PNG files.
+
+![PNG Metadata Editor Screenshot](screenshot.png)
+
+## Features
+
+- View all metadata fields (tEXt, zTXt, iTXt chunks) in PNG files
+- Add, edit, and delete metadata fields
+- Pretty-print JSON-formatted values
+- Copy metadata values to clipboard
+- Visual indication of unsaved changes
+
+## Installation
+
+### Prerequisites
+
+- Python 3.6+
+- Tkinter (usually included with Python)
+
+### Dependencies
+
+Install required packages using pip:
+
+```bash
+pip install pillow pngmeta
+```
+
+## Usage
+
+1. Run the application:
+   ```bash
+   python png-meta-editor.py
+   ```
+
+2. Open a PNG file using the "Open PNG File" button
+
+3. View metadata in the tree view on the left
+4. Select a field to see its full value in the detail pane
+5. Use the buttons to add, edit, or delete fields
+
+## Building for Distribution
+
+To create a standalone executable:
+
+```bash
+pyinstaller --name="PNG Metadata Editor" \
+            --windowed \
+            --onefile \
+            --icon=AppIcon.icns \
+            png-meta-editor.py
+```
+
+The resulting executable will be in the `dist/` directory.
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+
+## Author
+
+Robert Tusa
+[Your Contact Information]
+
+## Version History
+
+- 2023-10-01: Initial release