markdown_to_pdf

Generate a searchable, paginated PDF from CommonMark/GFM Markdown, with embedded fonts, tables and explicitly bound raster images. No Pdfium or external renderer is required to generate the file.

See Markdown Documents for the complete parameter table, supported syntax, fixed resource limits, cancellation and durability contract. Bundled fonts and bidi-aware layout support Ukrainian, Chinese, Japanese, Korean, Hebrew, Arabic and mixed-direction text. direction defaults to auto; language defaults to und. Missing glyphs fail rather than silently disappearing. Logical ActualText spans preserve Unicode for compatible readers; IronFlow's extract_pdf consumes these spans for the tested multilingual round trip. Untagged PDFs and other readers still have font/reading-order limitations. Links include their URLs as text, not clickable annotations. No PDF/A or PDF/UA compliance is claimed.

local flow = Flow.new("markdown_pdf")

flow:step("render", nodes.markdown_to_pdf({
    source_key = "report_markdown",
    output_path = "output/report.pdf",
    output_key = "pdf",
    page_size = "a4",
    margin = 54,
    font_size = 11,
    title = "Quarterly Report"
}))

return flow

Outputs are pdf (path), pdf_success and pdf_metadata, including a known pages count. Existing output files require explicit overwrite = true. Use markdown_to_docx for an editable Word document.