Every format Crate speaks.
Most of it works out of the box. Free, well-known tools add the rest, and Crate only offers those formats once they're installed.
AES-256 passwords for ZIP, split volumes
Needs ImageMagick or Inkscape
Markdown as input
Needs LibreOffice or pandoc
Optional formats convert to XLSX or PDF
Needs LibreOffice
Needs calibre
Any QuickTime-readable video
Needs ffmpeg
Needs ffmpeg
Needs FontForge
Needs ODA File Converter
Dashed formats need a free optional tool.
Optional tools
All free, installed with Homebrew. Crate’s Settings shows which ones you have, with the install command for each.
ffmpeg
Video and audio: MKV, WebM, AVI, MP3, FLAC and dozens more
LibreOffice
Office documents and spreadsheets: ODT, DOC, PPTX, XLS, Pages, Numbers
pandoc
More document formats
calibre
E-books: MOBI, AZW3, FB2 and more
ImageMagick
WebP and RAW camera formats
Inkscape
SVG
FontForge
Fonts: TTF, OTF, WOFF, WOFF2, EOT