Excel tool im Browser

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+# Excel Filter Tool - Streamlit Web Application
+
+A modern web-based Excel filtering tool built with Streamlit. This application allows you to filter Excel files using regex patterns, numeric filters, and column selection - all from your browser without installing any software.
+
+## Features
+
+- 📁 **Easy File Upload**: Drag and drop Excel files (.xlsx, .xls)
+- 🔍 **Regex Filtering**: Filter rows using powerful regex patterns
+- 🔢 **Numeric Filters**: Filter by numeric comparisons (>, <, >=, <=, =)
+- 📊 **Column Selection**: Choose specific columns for output
+- 🌐 **Multi-language Support**: German and English interface
+- 📈 **Statistics**: View filtering statistics and retention rates
+- 💾 **Configuration**: Save and load filter configurations
+
+## Quick Start
+
+### Run Locally (Windows)
+
+```bash
+run_streamlit.bat
+```
+
+### Run Locally (Linux/Mac)
+
+```bash
+chmod +x run_streamlit.sh
+./run_streamlit.sh
+```
+
+### Run with Docker
+
+```bash
+docker build -t excel-filter .
+docker run -p 8501:8501 excel-filter
+```
+
+### Run with Docker Compose
+
+```bash
+docker-compose up -d
+```
+
+## Coolify Deployment
+
+### Option 1: Docker Compose
+
+1. Push this repository to your Git server
+2. In Coolify, create a new resource and select "Docker Compose"
+3. Point to your repository
+4. Deploy!
+
+### Option 2: Dockerfile
+
+1. In Coolify, create a new resource and select "Dockerfile"
+2. Point to your repository
+3. Set the port to `8501`
+4. Deploy!
+
+### Environment Variables (Optional)
+
+No environment variables are required, but you can set:
+
+- `TZ` - Timezone (default: UTC)
+
+## Usage
+
+1. **Upload**: Drag and drop an Excel file or click to browse
+2. **Select Sheet**: Choose the worksheet to filter
+3. **Configure Filters**:
+   - **Regex Tab**: Enable regex filtering and enter a pattern
+   - **Numeric Tab**: Set up numeric comparisons
+   - **Columns Tab**: Select which columns to include
+4. **Apply**: Click "Apply Filters" to process
+5. **Download**: Click "Download Filtered File" to get results
+
+## File Structure
+
+```
+├── streamlit_app.py         # Main Streamlit application
+├── Dockerfile               # Docker configuration
+├── docker-compose.yml       # Docker Compose configuration
+├── .dockerignore            # Docker ignore file
+├── .streamlit/
+│   └── config.toml          # Streamlit configuration
+├── run_streamlit.bat        # Windows runner script
+├── run_streamlit.sh         # Linux/Mac runner script
+└── excel_filter/            # Core filter module
+    ├── filter.py            # Main filter logic
+    ├── requirements.txt     # Python dependencies
+    └── locales/             # Translations
+        ├── de.json
+        └── en.json
+```
+
+## Regex Examples
+
+| Pattern | Description |
+|---------|-------------|
+| `error\|warning` | Find rows with "error" OR "warning" |
+| `[0-9]{4}` | Find 4-digit numbers |
+| `[a-z]+@[a-z]+\.[a-z]{2,}` | Find email addresses |
+| `\d{4}-\d{2}-\d{2}` | Find dates (YYYY-MM-DD) |
+| `error.*critical` | Find "error" followed by "critical" |
+
+## Development
+
+### Prerequisites
+
+- Python 3.11+
+- pip
+
+### Installation
+
+```bash
+python -m venv venv
+source venv/bin/activate  # Linux/Mac
+# or
+venv\Scripts\activate  # Windows
+
+pip install -r excel_filter/requirements.txt
+pip install streamlit
+```
+
+### Run Development Server
+
+```bash
+streamlit run streamlit_app.py
+```
+
+## License
+
+See LICENSE file for details.