Zfetch -- Another system information fetcher written in Zig

jiacai2050 · March 19, 2026, 1:15pm

zfetch () is a lightweight, high-performance system information fetcher inspired by the fastfetch.

The “z” stands for both Zig (the language it’s written in) and zap ( lightning-fast). It aims to be extremely fast by avoiding external process calls and using native C APIs or virtual filesystems instead.

Cross-platform: Supports macOS, Linux, and FreeBSD.
Detailed Memory Info:
- On macOS: Provides breakdown of App Memory, Wired Memory, and Compressed Memory (matching Activity Monitor).
- On Linux: Provides Swap usage details.
- On FreeBSD: Uses sysctl for memory and ACPI for battery status.
Hardware Insights: Displays CPU core distribution (Performance vs. Efficiency cores on Apple Silicon), GPU (macOS), and Page Size.
High Performance: Uses sysctl, IOKit, CoreFoundation on macOS, procfs, sysfs on Linux, and sysctl on FreeBSD.

Demo

Install

curl -fsSL https://zigcli.liujiacai.net/install.sh | sh -s -- --bins "zfetch"

Source code

github.com/jiacai2050/zigcli

src/bin/zfetch.zig

main

//! zfetch — system information fetcher in Zig.
//! Inspired by https://github.com/fastfetch-cli/fastfetch

const std = @import("std");
const simargs = @import("simargs");
const util = @import("util.zig");
const builtin = @import("builtin");
const mem = std.mem;
const fmt = std.fmt;

const common = @import("zfetch/common.zig");
const platform = switch (builtin.os.tag) {
    .linux => @import("zfetch/linux.zig"),
    .macos => @import("zfetch/macos.zig"),
    .freebsd => @import("zfetch/freebsd.zig"),
    else => @compileError("Unsupported OS"),
};

const Format = enum { text, json };

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