Choosing a LaTeX Compiler

Documentation Index

Fetch the complete documentation index at: https://resources.latex-cloud-studio.com/llms.txt

Use this file to discover all available pages before exploring further.

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What is a LaTeX Compiler?

1. Reads your source file (.tex)
2. Processes all commands and content
3. Generates output (PDF, DVI, etc.)
4. Reports any errors or warnings

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Main LaTeX Compilers

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pdfLaTeX (Default Choice)

• Fast compilation
• Excellent compatibility
• Mature and stable
• Supports most packages
• Default in most systems

• Limited to 8-bit fonts
• No direct Unicode support
• Can’t use system fonts

• Most documents
• Academic papers
• When compatibility matters
• Beginning LaTeX users

\documentclass{article}
\usepackage[utf8]{inputenc} % Needed for special characters
\usepackage[T1]{fontenc}     % Better font encoding

\begin{document}
This document compiles perfectly with pdfLaTeX!
\end{document}

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XeLaTeX (Modern Typography)

• Full Unicode support
• Use any system font
• Better multilingual support
• Advanced typography features
• Handles complex scripts

• Slower compilation
• Some packages incompatible
• Larger file sizes

• Documents with special fonts
• Multilingual documents
• Non-Latin scripts
• Typography-focused work

\documentclass{article}
\usepackage{fontspec} % XeLaTeX font selection

% Use any font installed on your system
\setmainfont{Helvetica Neue}
\setsansfont{Arial}
\setmonofont{Consolas}

\begin{document}
XeLaTeX lets you use any font: English, 中文, العربية, ελληνικά!
\end{document}

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LuaLaTeX (Programmable Power)

• Full Unicode support
• Lua scripting capability
• Modern font handling
• Microtype improvements
• Active development

• Slowest compilation
• Newest (less documentation)
• Some compatibility issues

• Complex programmatic documents
• Advanced typography
• When you need scripting
• Future-proof projects

\documentclass{article}
\usepackage{fontspec}
\usepackage{luacode}

\begin{document}
LuaLaTeX can execute Lua code:

\begin{luacode}
for i = 1, 5 do
    tex.print("Line " .. i .. "\\\\")
end
\end{luacode}
\end{document}

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Comparison Table

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How to Choose

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Use pdfLaTeX when:

• You’re just starting with LaTeX
• Writing standard academic documents
• Need maximum compatibility
• Want fastest compilation
• Using traditional LaTeX packages

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Use XeLaTeX when:

• Need specific fonts (corporate branding)
• Writing in multiple languages
• Using non-Latin scripts
• Want OpenType font features
• Typography is crucial

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Use LuaLaTeX when:

• Need programmatic document generation
• Want the latest features
• Require advanced typography
• Can accept slower compilation
• Building complex automated documents

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Compiler-Specific Commands

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Checking Your Compiler

\documentclass{article}

% Load appropriate packages based on compiler
\usepackage{ifxetex,ifluatex}
\ifxetex
    \usepackage{fontspec}
    \newcommand{\mycompiler}{XeLaTeX}
\else\ifluatex
    \usepackage{fontspec}
    \newcommand{\mycompiler}{LuaLaTeX}
\else
    \usepackage[utf8]{inputenc}
    \usepackage[T1]{fontenc}
    \newcommand{\mycompiler}{pdfLaTeX}
\fi\fi

\begin{document}
This document was compiled with \mycompiler.
\end{document}

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Font Selection by Compiler

\documentclass{article}
\usepackage{ifxetex,ifluatex}

% Modern font setup for XeLaTeX/LuaLaTeX
\ifxetex\else\ifluatex\else
    % pdfLaTeX font setup
    \usepackage[T1]{fontenc}
    \usepackage{lmodern} % Latin Modern fonts
\fi\fi

\ifxetex
    \usepackage{fontspec}
    \setmainfont{Times New Roman}
\else\ifluatex
    \usepackage{fontspec}
    \setmainfont{Times New Roman}
\fi\fi

\begin{document}
Fonts work correctly regardless of compiler!
\end{document}

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Special Use Cases

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Mathematical Documents

• Best package support
• Fast compilation
• All math packages work

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Multilingual Documents

• Full Unicode support
• Easy font switching
• Proper script handling

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Presentations

• Fast compilation for iterations
• Full Beamer compatibility
• Reliable output

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Books with Custom Fonts

• Professional typography
• Font flexibility
• Advanced features

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In LaTeX Cloud Studio

1. Automatic Detection: We analyze your document and suggest the best compiler
2. Easy Switching: Change compilers in document settings
3. Error Handling: Clear messages if packages need a different compiler
4. Preconfiqured: All compilers are ready to use

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Setting Compiler in Your Document

% !TEX program = xelatex
\documentclass{article}
\usepackage{fontspec}
...

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Troubleshooting Compiler Issues

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Migration Guide

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From pdfLaTeX to XeLaTeX

% Remove these:
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

% Add this:
\usepackage{fontspec}

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From XeLaTeX to pdfLaTeX

% Remove:
\setmainfont{Arial}

% Add:
\usepackage{helvet}
\renewcommand{\familydefault}{\sfdefault}

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Performance Tips

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Quick Decision Chart

Need special fonts? ──> Yes ──> XeLaTeX
         │
         No
         │
         ▼
Need Unicode? ──> Yes ──> XeLaTeX/LuaLaTeX
         │
         No
         │
         ▼
Need scripting? ──> Yes ──> LuaLaTeX
         │
         No
         │
         ▼
    pdfLaTeX (Best default choice)

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Summary

• Start with pdfLaTeX - It’s fast and compatible
• Switch to XeLaTeX - When you need fonts or languages
• Try LuaLaTeX - For advanced programmable documents