Convert AGDA to PDF Online

The short version: Converting your Agda source files into a PDF document is primarily about presentation and portability. While Agda is a powerful proof assistant, its native files, which you might [open AGDA files](https://openanyfile.app/agda-file) to inspect, aren't designed for direct, human-friendly reading or archival without the Agda environment. PDF, on the other hand, is a universal document format. This process generally involves compiling your Agda code to a TeX/LaTeX intermediate and then processing that into a PDF.

Real-World Scenarios for AGDA to PDF Conversion

You might wonder why bother converting Agda code, a [Programming files](https://openanyfile.app/programming-file-types), to something like PDF. There are several common scenarios where this is absolutely essential. Imagine you've developed a significant proof or formalization in Agda, detailing complex mathematical structures or software properties.

1. Academic Publication/Submission: Many academic conferences and journals require submissions in PDF format. Sending raw .agda files, even with extensive comments, is just not acceptable. A PDF ensures consistent rendering across different systems and provides a static, verifiable record of your proof's structure and output. This is similar to how you might share results from a [JULIA format](https://openanyfile.app/format/julia) script or document output from [Lean format](https://openanyfile.app/format/lean) for a paper.
2. Code Review and Collaboration (Offline): While live Agda development benefits from the interactive environment, sometimes you need to print out sections for extensive review or annotate them manually. A high-quality PDF with syntax highlighting makes this much easier than staring at plain text.
3. Archival and Documentation: For long-term archival, a PDF is much more stable than a dependency-heavy Agda project. You're preserving the visual representation of your proof at a specific point in time, independent of future Agda version changes or specific compiler setups. This is also true for documenting [HEEX format](https://openanyfile.app/format/heex) files in web development, for instance.
4. Presentation Materials: If you're giving a talk about your Agda work, embedding rendered proofs as PDFs into slides (or even printing them as handouts) can be far more effective than trying to navigate live Agda code during a presentation. It provides a clean, professional look.
5. Sharing with Non-Agda Users: Not everyone you're collaborating with will have Agda installed or be familiar with its environment. A PDF allows them to view your formal proofs and their structure without any specialized software, making it accessible to a broader audience. If you need to [convert AGDA files](https://openanyfile.app/convert/agda) for someone who isn't a power user, PDF is often the way to go.

Step-by-Step Conversion Process

Converting Agda to PDF isn't a single-command operation, but it's well-supported by Agda's tooling. Here's the general workflow you'd follow. For general information on [how to open AGDA](https://openanyfile.app/how-to-open-agda-file) files before conversion, check our guides.

1. Ensure TeX/LaTeX Setup: You need a working TeX distribution (like TeX Live or MiKTeX) installed on your system. Agda doesn't directly create PDFs; it generates LaTeX code that then gets compiled into a PDF.
2. Agda's LaTeX Backend: Agda itself has a --latex flag (or agda-mode latex if you're using Emacs) that generates a .tex file for each Agda module. This LaTeX output is designed to format your Agda code, including syntax highlighting, and display proof terms where appropriate.

• From the command line, you might run: agda --latex YourModule.agda
• This will produce YourModule.tex in a latex/ subdirectory (by default) from your project root.

1. Compile LaTeX to PDF: Once you have the .tex file, you use a LaTeX compiler (like pdflatex) to generate the PDF.

• Navigate to the directory containing the generated .tex file (e.g., cd latex/).
• Run: pdflatex YourModule.tex (you might need to run this command multiple times for cross-references to resolve correctly, typically 2-3 times).
• This will produce YourModule.pdf.

1. Post-processing (Optional): You might want to clean up intermediate files (.aux, .log, .out, etc.) generated by LaTeX.

OpenAnyFile.app provides generalized [file conversion tools](https://openanyfile.app/conversions) for many formats, but for Agda, thisTeX/LaTeX intermediate step is quite specific to the proof assistant's design.

Output Differences and Considerations

The PDF output from Agda's LaTeX backend is quite distinct from a mere printout of your Agda source.

• Syntax Highlighting: The LaTeX output preserves Agda's syntax highlighting, making the code much more readable and visually structured. Keywords, types, and terms will be colored appropriately, mimicking the experience in an IDE.
• Literate Programming: If you've used Agda's literate programming features (where prose and code are intertwined, often using Agda's Emacs mode), the PDF will seamlessly integrate these prose comments with the code, forming a coherent document. This is one of Agda's strengths for documenting proofs explicitly.
• Symbols and Unicode: Agda often uses specialized mathematical symbols and Unicode characters. The LaTeX backend handles these gracefully, ensuring they render correctly in the PDF, which can be tricky in other text-based conversions like [AGDA to TXT](https://openanyfile.app/convert/agda-to-txt).
• Structure and Formatting: The LaTeX template used by Agda provides reasonable defaults for code blocks, indentation, and overall document structure, turning a raw .agda file into a professionally formatted document.
• Proof Term Display (Optional): Depending on your Agda project's configuration and the specific --latex flags you use, you can choose to display implicit arguments, proof terms, or other details that are usually hidden in the interactive environment, giving a more complete view of the proof in the PDF. This level of detail isn't available in simpler conversions.

Optimization and Automation

For larger Agda projects or frequent documentation updates, manual conversion can become tedious. Automation is key here.

• Makefiles: The most common approach is to use Makefiles. You can define rules that first run agda --latex on all your modules and then loop through the generated .tex files, running pdflatex multiple times on each. This ensures that all components convert with a single make command.
• Shell Scripts: Simple shell scripts can also orchestrate the conversion process. A script can traverse your Agda project directory, find all .agda files, execute agda --latex for each, and then compile the resulting .tex files.
• CI/CD Integration: For collaborative projects, integrate the PDF generation into your Continuous Integration/Continuous Deployment (CI/CD) pipeline. Every successful build or push to your repository could automatically generate an updated PDF, ensuring documentation is always current. This is particularly useful for project with many [all supported formats](https://openanyfile.app/formats) that need to be consistently updated.
• Custom LaTeX Templates: Agda allows you to provide your own LaTeX preamble files, giving you fine-grained control over the PDF's appearance, fonts, margins, headers, and footers. This is where you can align the output with specific journal requirements or institutional branding.

Error Handling During Conversion

Errors in Agda to PDF conversion usually stem from two main areas: your Agda code itself or the LaTeX compilation.

1. Agda Type Errors: If your Agda module has type errors, agda --latex will likely still generate a .tex file but might insert error messages into the output. The best practice is to ensure your Agda code is fully type-checked (agda -c YourModule.agda or in Emacs, C-c C-l) before attempting LaTeX generation.
2. LaTeX Compilation Errors: These are more common and can be cryptic.

• Missing Packages: LaTeX documents often rely on various packages (e.g., amsmath, xcolor, tikz). If your LaTeX installation is minimal or you're using a custom preamble that specifies a package you don't have, pdflatex will error out. Check the .log file for ! LaTeX Error: File ... not found. messages. The fix is usually installing the missing package via your TeX distribution's package manager.
• Bad Characters: While Agda's LaTeX backend generally handles Unicode well, very unusual characters or malformed custom macros in your LaTeX preamble can sometimes cause issues.
• Too Many Passes: Failing to run pdflatex enough times can result in unresolved cross-references or "question marks" instead of page/section numbers. Running it 2-3 times usually fixes this.
• Disk Space/Memory: For very large documents or complex graphics, LaTeX compilation can be resource-intensive. Ensure you have sufficient disk space and memory.

Always review the .log file generated by pdflatex first; it contains the most detailed error messages. When encountering issues converting files even when you can [open AGDA files](https://openanyfile.app/agda-file) without issues, it's almost always on the LaTeX side.

FAQ

Q: Can I convert Agda to PDF online without installing Agda or LaTeX?

A: Due to the two-step nature (Agda generates TeX, TeX generates PDF), a direct, generic online converter for Agda to PDF is less common and often less reliable than using the official tools. Online services would need a full Agda environment and a TeX distribution. For quick viewing without local setup, it's better to share the Agda source directly with someone who has the environment or to share a pre-generated PDF.

Q: How do I ensure my custom LaTeX styling is used?

A: You can tell Agda's --latex backend to use a custom LaTeX preamble. Typically, you create a file (e.g., my-preamble.tex) and then invoke Agda with a flag like --latex-opts='--custom-preamble=my-preamble.tex'. This lets you specify document classes, packages, and custom commands.

Q: Why does my PDF look different from what I see in Emacs/Agda-mode?

A: While the Agda LaTeX backend tries to mimic the interactive environment, there will be subtle differences. Fonts, precise layout, and the display of interactive features (like goal types) are distinct. The PDF aims for a static, print-ready representation, not a live, interactive one.

Q: What if I only want to convert a specific part of my Agda file?

A: Agda's --latex command processes entire modules. If you need a specific snippet, you'd typically extract that snippet into its own small Agda module (ensuring it type-checks independently), convert that module, and then manually incorporate the resulting PDF into your larger document or presentation.