Brim for Windows

Brim — a fast desktop tool for packet and log inspection

Brim is a free Windows desktop application built to help analysts explore large packet capture files and Zeek-generated logs. It’s designed for quick discovery and inspection of network activity, offering searchable views and visualizations that make it easier to interpret complex traffic and forensic data.

Core capabilities

• Rapid text and field searches across very large captures, so you can locate interesting events quickly
• A spreadsheet-style table view that presents structured records for easier inspection
• Built-in data-wrangling utilities that simplify filtering, transforming, and narrowing results
• A typed data model that helps surface consistent fields and speeds up queries
• Integrations that make working with Zeek logs and other network telemetry straightforward

Supported file types and formats

• CSV files for importing tabular exports from other tools or reports
• JSON documents when logs or exports are stored in structured text form
• Packet captures (pcap) and native Zeek logs for raw traffic and protocol-level records

When to choose Brim

Brim is a good fit if you need a desktop-focused environment to sift through very large captures without moving to cloud services, and if you want a combination of fast search, tabular inspection, and lightweight visualization. Its interface is approachable for security analysts and network engineers who prefer point-and-click exploration backed by powerful query capabilities.

Other options to consider

• SHAREit — a free utility often used for rapid file transfer; note that it is not a packet-analysis tool and serves a different purpose than Brim