A small online service to convert a LaTeX document to SVG, using Bun, Elysia, texlive.net and pdf2svg.

This is mainly intended for internal usage in a company, so it's run on a pretty small machine and I don't want to pay too much for this. Hence an API key is required to prevent over-use. If you want an API key, feel free to contact [email protected].

const texContent = `
\\documentclass[tikz]{standalone}
\\begin{document}
\\begin{tikzpicture}
  \\draw (0,0) circle (1cm);
\\end{tikzpicture}
\\end{document}
`.trimStart();

const res = await fetch("https://latex2svg.joulev.dev/v1", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({ fileContent: texContent }),
});
const svg = await res.text();
// <svg xmlns="http://www.w3.org/2000/svg" ...

The endpoint accepts JSON requests of type

interface BodySchema {
  fileContent: string;
}

The file will then be run on pdflatex.

The endpoint always returns textual response so res.text() is safe.

If the compilation succeeds, the Content-Type of the response is set to image/svg+xml with the text response being the SVG code.

If the compilation fails with an error, the 400 status code is used with Content-Type being text/plain and the response being the compilation log. You may want to let the user know this log content for them to debug the compilation error.