sing-box-config-converter 0.1.0

Generate sing-box client configs from server configs, with QR code output

sing-box-config-converter

Generate a sing-box client config from a server config, with optional QR code output.

Supported protocols: hysteria2, shadowsocks, trojan
Supported transports: plain TCP/UDP, TLS (including Reality / XTLS)

Requirements

• Python 3.10+
• uv

Quick Start with uvx

No installation required — run directly with:

uvx sing-box-config-converter server.json

With QR code support:

uvx --with "sing-box-config-converter[qr]" sing-box-config-converter server.json

Installation

uv sync --extra qr

The --extra qr flag installs qrcode[pil] for QR code support. Omit it if you don't need QR output.

Usage

uv run sing-box-config-converter <server_config> [server_address] [options]

Arguments

Argument	Description
server_config	Path to the sing-box server config JSON
server_address	Public IP or hostname for clients to connect to. If omitted, auto-detected from the current machine

Options

Option	Default	Description
-o, --output	client.json	Output path for the generated client config
--use-tun	off	Use TUN inbound instead of mixed (SOCKS+HTTP)
--mixed-port	random	Port for mixed (SOCKS+HTTP) inbound
--show-terminal-qr	off	Print QR code as ASCII art in the terminal
--qr-dir	—	Directory to save QR code as a PNG image

Examples

Generate a client config (server address auto-detected):

uv run sing-box-config-converter /etc/sing-box/config.json

Specify the server address explicitly:

uv run sing-box-config-converter /etc/sing-box/config.json 203.0.113.42

Use TUN mode and save a QR code image:

uv run sing-box-config-converter config.json 203.0.113.42 --use-tun --qr-dir ./qr

Print a QR code in the terminal:

uv run sing-box-config-converter config.json --show-terminal-qr

Output

The generated client config includes:

• Outbounds — one per supported inbound in the server config; wrapped in a urltest selector when there are multiple
• DNS — fakeip for remote, 223.5.5.5 for local/direct
• Route — DNS hijack, private IP bypass, sniff
• Inbound — mixed (SOCKS5+HTTP) on a local port, or tun with auto_route

Notes

• __SERVER_ADDRESS__ placeholders in the output are replaced with the provided (or auto-detected) server address.
• QR codes encode the full client config JSON. Large configs may exceed QR capacity; consider sharing the config file directly if the QR is unreadable.