Update README with free option details

README.md

@@ -7,4 +7,29 @@ sdk: docker
 pinned: false
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-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# 📊 JSON Field Analyzer
+
+Analyze JSON files and identify important fields using AI models.
+
+## 🆓 FREE to Use!
+
+This app includes **FREE AI models** that require NO API keys:
+- **Hugging Face Inference API** - Completely free, no setup needed!
+
+## 🚀 Quick Start
+
+1. Upload a JSON file
+2. Select "Hugging Face (Free 🌟)" as the LLM provider
+3. Click "Analyze with LLM"
+4. Get instant results with regex patterns!
+
+## 💡 What It Does
+
+- Analyzes JSON structure and detects summary fields
+- Identifies important fields related to your target
+- Generates regex patterns for data extraction
+- Provides reasoning for field prioritization
+
+## 🔧 Optional: Paid Providers
+
+You can also use OpenAI or Anthropic Claude if you want premium models (API keys required).