# ysc3839/FontMod

Simple hook tool to change Win32 program font.

Repository: https://github.com/ysc3839/FontMod
Canonical: https://ross.abutalabs.com/products/fontmod
Language: C++
License: MIT
License Family: permissive
Topics: windows, dll-hijacking, dll-hijack, hook, hooks, arm, arm64, gdiplus, gdi
Last push: 2021-08-09T06:21:28+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3655, "days_push": 1850, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1355, forks 61 (observed 2026-08-28T04:04:29.204148+00:00)

## What it is
FontMod is a Windows DLL hooking tool that changes the fonts used by Win32 programs, including GDI, GDI+, and Qt-based applications. It works via DLL hijacking (renaming the DLL to a name like version.dll) and is configured with a YAML file to replace or restyle fonts without installing them system-wide.

## Use cases
- change the default font of a Win32 desktop application
- replace SimSun with Microsoft YaHei in a Chinese Windows app
- customize fonts in Telegram Desktop or Mendeley Desktop
- use custom fonts without installing them system-wide
- fix ugly fallback fonts in GDI+ applications
- override font size and weight in a legacy Windows program

## When to choose
- you need to change fonts in a closed-source Win32, GDI/GDI+, or Qt app you cannot modify
- you want per-application font replacement without touching system fonts
- you need ARM/ARM64 support on Windows

## When to avoid
- you need to change fonts in UWP or DirectX-rendered applications
- you want a system-wide font substitution solution
- you need a supported, officially sanctioned customization method for the target app

## Facets
- artifact type: library
- maturity: maintenance
- function: middleware, configuration-management
- domain: windows, desktop-applications
- platform: windows
- tags: dll-hijacking, hooking, gdi, gdiplus, font-replacement, qt, yaml-config, fonts, arm64

## Member repositories
- ysc3839/FontMod (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:29.204148+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:41:59.226803+00:00, confidence not recorded.
  - readme: https://github.com/ysc3839/FontMod (fetched 2026-08-28T04:04:29.204148+00:00, sha 2a3c0bb134be)
- Data as of 2026-08-30T08:39:29.467469+00:00.