// Open Source Credits

TriFold PDF wouldn't exist without the open-source community. We use these projects to convert your Markdown into beautiful PDFs—and we're grateful for every one of them.

Document Processing

The engines that turn Markdown into PDFs:

• Pandoc (GPL v2+)—Universal document converter. Transforms Markdown to LaTeX.
• Tectonic (MIT)—Modern TeX engine. Compiles LaTeX to PDF.

PDF Fonts

Professional fonts from the GUST e-foundry, all released under the GUST Font License:

• Latin Modern—Default body font. A modern take on Computer Modern.
• TeX Gyre Pagella—Palatino-inspired serif. Elegant and readable.
• TeX Gyre Heros—Helvetica-style sans-serif. Clean and modern.
• TeX Gyre Termes—Times-style serif. Classic and professional.
• TeX Gyre Cursor—Courier-style monospace. For code and fixed-width text.

Web Fonts

Website typography from Google Fonts, licensed under the SIL Open Font License:

• JetBrains Mono (SIL OFL)—Monospace font for code and UI elements.
• Inter (SIL OFL)—Body text and headings.

Backend Framework

The Python ecosystem that powers the API:

• FastAPI (MIT)—High-performance web framework.
• Pydantic (MIT)—Data validation and settings management.
• python-multipart (Apache 2.0)—Form data parsing.
• Uvicorn (BSD-3-Clause)—Lightning-fast ASGI server.
• aiosqlite (MIT)—Async SQLite database access.
• PyJWT (MIT)—JSON Web Token implementation.
• cryptography (Apache 2.0/BSD)—Cryptographic primitives.

Platform and Deployment

The tools that keep everything running:

• Python (PSF License)—The programming language we build on.
• Caddy (Apache 2.0)—Web server with automatic HTTPS.
• Docker (Apache 2.0)—Container runtime for consistent deployment.
• OpenTofu (MPL 2.0)—Infrastructure as Code for AWS.

Services We Use

External services that integrate with TriFold PDF:

• Plausible Analytics—Privacy-friendly usage analytics.
• Stripe—Secure payment processing for Pro.

Thank You

To all the maintainers, contributors, and communities behind these projects—thank you. Your work makes tools like TriFold PDF possible.

TriFold PDF itself is open source under the MIT licence.