fblog ☆

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Description:
Small command-line JSON log viewer

Type: Formula | Latest Version: 4.17.0@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: json logs cli viewer developer-tools

Install: brew install fblog

About:
fblog is a command-line utility designed to parse and colorize JSON-formatted log streams, making them human-readable. It transforms verbose, single-line JSON logs into a structured, multi-line format, highlighting key fields like timestamps, log levels, and messages. This tool significantly improves the debugging and monitoring experience for developers working with JSON-based logging systems.

Key Features:

Automatic colorization of log levels and key fields
Support for custom log format patterns
Efficient streaming of large log files
Handles both pretty-printed and minified JSON input

Use Cases:

Parsing JSON logs from cloud services or containerized applications
Real-time log monitoring during development or debugging
Filtering and formatting log files for better readability in terminals

Alternatives:

jq – jq is a powerful general-purpose JSON processor, while fblog is specialized for log viewing with built-in formatting and coloring.
gron – gron converts JSON into discrete JavaScript assignments, useful for scripting, whereas fblog focuses on human-readable log output.

License: WTFPL

Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, sonoma, arm64_linux, x86_64_linux

Version History

Detected	Change	Commit
Sep 29, 2025 7:59am	VERSION_BUMP	3f6c548f
Sep 24, 2025 5:21pm	VERSION_BUMP	b8c30a89
Sep 13, 2025 5:57pm	VERSION_BUMP	90a0daaa
Dec 21, 2024 12:31am	VERSION_BUMP	dd840914
Oct 4, 2024 12:33pm	VERSION_BUMP	2e746383
Sep 27, 2024 10:27am	VERSION_BUMP	3bfbcb5a
Sep 27, 2024 9:32am	VERSION_BUMP	9039427d
Sep 27, 2024 6:54am	VERSION_BUMP	b63be111
Sep 27, 2024 6:33am	VERSION_BUMP	9ccbedff
Sep 13, 2024 4:26am	VERSION_BUMP	3213706e