> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://mezmo.ferndocs.com/ai-guides-compact-field-processor/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://mezmo.ferndocs.com/_mcp/server.

# Compact Fields Processor

## Compact Fields Processor

**Purpose:** This processor removes empty or unnecessary fields from log events, compacting data to reduce transmission size.

**Key Features:**

* **Field Filtering:** Specify fields to retain; empty values are automatically removed.
* **Data Efficiency:** Ideal for logs with sparse or redundant data (e.g., empty fields).

**Steps to Add:**

1. Edit your pipeline and click **Add Processor**.
2. Select **Compact Fields** and add a title/description.
3. Define the fields to compact, referencing data profiles (found in the secondary sidebar) for field structure insights.