fx

fx is an open-source developer tool for working with structured data on Linux. Built in Go, it is distributed as a single self-contained binary. It is suited to developers who need to inspect or process JSON and YAML from the terminal.

The tool can read JSON as a stream, including one JSON value per line or values separated by newlines. Data processing uses expressions with familiar JavaScript syntax instead of requiring a separate domain-specific language. fx preserves precision when handling large integers and accepts JSON containing comments or trailing commas. It also supports YAML, a human-readable data serialization format.

For terminal use, fx provides autocompletion for bash, zsh, and fish. Long strings can be wrapped or previewed in a separate viewer. As a Linux application in the Developer Tools category, it is distributed under an open-source license. MirrorNest stores the official build directly on its own storage and scans it for malware before publishing.