The code in imgui.cpp embeds a copy of 'ProggyClean.ttf' that you can use without any external files. Those are only provided as a convenience, you can load your own .TTF files. --------------------------------- LOADING INSTRUCTIONS --------------------------------- Load default font with: ImGuiIO& io = ImGui::GetIO(); io.Fonts->AddFontDefault(); Load .TTF file with: ImGuiIO& io = ImGui::GetIO(); io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels); Detailed options: ImFontConfig config; config.OversampleH = 3; config.OversampleV = 3; config.GlyphExtraSpacing.x = 1.0f; io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, &config); Combine two fonts into one: // Load main font io.Fonts->AddFontDefault(); // Add character ranges and merge into main font // The ranges array is not copied by the AddFont* functions and is used lazily // so ensure it is available for duration of font usage static const ImWchar icons_ranges[] = { 0xf000, 0xf3ff, 0 }; // will not be copied by AddFont* so keep in scope. ImFontConfig config; config.MergeMode = true; io.Fonts->AddFontFromFileTTF("DroidSans.ttf", 18.0f, &config, io.Fonts->GetGlyphRangesJapanese()); io.Fonts->AddFontFromFileTTF("fontawesome-webfont.ttf", 18.0f, &config, icons_ranges); Add a fourth parameter to bake specific font ranges only: // Basic Latin, Extended Latin io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, NULL, io.Fonts->GetGlyphRangesDefault()); // Include full set of about 21000 CJK Unified Ideographs io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, NULL, io.Fonts->GetGlyphRangesJapanese()); // Default + Hiragana, Katakana, Half-Width, Selection of 1946 Ideographs io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels, NULL, io.Fonts->GetGlyphRangesChinese()); Offset font vertically by altering the io.Font->DisplayOffset value: ImFont* font = io.Fonts->AddFontFromFileTTF("font.ttf", size_pixels); font->DisplayOffset.y += 1; // Render 1 pixel down --------------------------------- EMBED A FONT IN SOURCE CODE --------------------------------- Compile and use 'binary_to_compressed_c.cpp' to create a compressed C style array. Then load the font with: ImFont* font = io.Fonts->AddFontFromMemoryCompressedTTF(compressed_data, compressed_data_size, size_pixels, ...); Or ImFont* font = io.Fonts->AddFontFromMemoryCompressedBase85TTF(compressed_data_base85, size_pixels, ...); --------------------------------- INCLUDED FONT FILES --------------------------------- Cousine-Regular.ttf Digitized data copyright (c) 2010 Google Corporation. Licensed under the SIL Open Font License, Version 1.1 DroidSans.ttf Copyright (c) Steve Matteson Apache License, version 2.0 http://www.google.com/fonts/specimen/Droid+Sans ProggyClean.ttf Copyright (c) 2004, 2005 Tristan Grimmer MIT License recommended loading setting in ImGui: Size = 13.0, DisplayOffset.Y = +1 ProggyTiny.ttf Copyright (c) 2004, 2005 Tristan Grimmer MIT License recommended loading setting in ImGui: Size = 10.0, DisplayOffset.Y = +1 Karla-Regular Copyright (c) 2012, Jonathan Pinhorn SIL OPEN FONT LICENSE Version 1.1 --------------------------------- LINKS --------------------------------- Icon fonts https://fortawesome.github.io/Font-Awesome/ https://github.com/SamBrishes/kenney-icon-font Typefaces for source code beautification https://github.com/chrissimpkins/codeface Programmation fonts http://s9w.github.io/font_compare/ Proggy Programming Fonts http://upperbounds.net Inconsolata http://www.levien.com/type/myfonts/inconsolata.html Adobe Source Code Pro: Monospaced font family for user interface and coding environments https://github.com/adobe-fonts/source-code-pro Monospace/Fixed Width Programmer's Fonts http://www.lowing.org/fonts/ (Japanese) M+ fonts by Coji Morishita are free and include most useful Kanjis you would need. http://mplus-fonts.sourceforge.jp/mplus-outline-fonts/index-en.html Or use Arial Unicode or other Unicode fonts provided with Windows for full characters coverage (not sure of their licensing).