Fountain+ 
- Reads every Fountain primitive — scene headings, characters, dialogue, parentheticals, transitions, dual dialogue, and title page metadata
- Outputs a Final Draft .fdx project ready to hand to a producer or collaborator who lives in Final Draft
- Conversion runs client-side — your script never leaves your browser
- Preserves italic, bold, and underline as Final Draft inline styling; Fountain notes survive as FDX notes
You write in Fountain because you like text editors, git, and not paying for Final Draft. Your producer doesn't share those preferences. This converter takes your .fountain script and outputs an .fdx file Final Draft opens as a real project — characters, scene headings, dialogue all wired up.
What to expect
Fountain and FDX represent the same screenplay primitives, so this conversion is essentially lossless. Scene headings, characters, dialogue, parentheticals, transitions, dual dialogue, and title page metadata all transfer with full fidelity. Emphasis (italic, bold, underline) is preserved as Final Draft's inline styling. Fountain notes ([[ ... ]]) survive as FDX notes; boneyards are excluded by default. What's not in Fountain — Final Draft-specific scene properties, revision marks, script colours — won't appear in the output because they were never in the source.
How it works
Your file never leaves your browser — conversion runs entirely client-side. The .fountain source is parsed into a Screenplay object by the native Fountain parser, then serialised into Final Draft's .fdx XML schema.
The collaboration handoff
The reason this conversion exists is the handoff problem.
You write in Fountain because plain text version-controls, diffs, and merges. Your producer, script supervisor, or assistant works in Final Draft because that's what the rest of the production uses.
The fight over which format wins is not worth having — convert at the boundary.
What Fountain looks like
Title: Big Fish Credit: written by Author: John August Source: based on the novel by Daniel Wallace Copyright: (c) 2003 Columbia Pictures **FADE IN:** A RIVER. We're underwater, watching a fat catfish swim along. This is The Beast. EDWARD (V.O.) There are some fish that cannot be caught. It's not that they're faster or stronger than other fish. They're just touched by something extra. EDWARD I didn't put any stock into such speculation or superstition. (closer) And on the day you were born, that was the day I finally caught him.
Opening of Big Fish by John August — title page metadata, FADE IN, action, voice-over cue, and a parenthetical.
Source: Fountain syntax reference.