FastLog — Analyze large log files in seconds

🔍 FastLog — fast CLI log analyzer for huge files (Windows)

FastLog is a high-performance command-line log analyzer designed for developers who work with large log files and don’t want to open them in slow or crashing text editors. It lets you quickly inspect, filter, and summarize logs directly from the terminal — even when files are hundreds of megabytes or more.

FastLog is available in Free and Pro versions.

🆓 Free version (included)

The free version is perfect for quick inspection and everyday debugging:

Show top 50 results

Single-threaded processing

Basic filtering and analysis

Windows native binary

No installation, no dependencies

You can download and use the free version without any registration.

⭐ Pro version (paid)

Upgrade to FastLog Pro if you work with large logs regularly or need deeper analysis:

Unlimited results (no Top-50 limit)

Multi-threaded processing for maximum speed

Export results to JSON

Designed for multi-GB log files

Priority updates and future features

⚙️ Download & Install

Download the FastLog ZIP archive

Extract it to any folder

Run fastlog.exe from Command Prompt or PowerShell

Example:

fastlog analyze server.log --level ERROR

No installation required. No external libraries needed.

💡 Why FastLog?

Avoid opening huge logs in Notepad++ or IDEs

Get results in seconds, not minutes

Script-friendly CLI tool

Built for performance and simplicity

If FastLog saves you time, consider upgrading to the Pro version to remove limits and support development.