ActOne is an open-source Fountain screenplay editor for Windows and Linux, created by a filmmaker for writers. It provides a focused writing environment, uses plain-text Fountain files, and stores projects in portable .actone bundles.
Features
- Fountain editing with live syntax highlighting
- Character, scene, location, and transition autocomplete
- Keyboard-driven formatting and scene navigation
- Outline view with sections, synopses, scene colors, and storylines
- Multi-script
.actoneprojects - Local snapshots stored in each project's
.snapshots/directory - Optional offline spellcheck with downloadable dictionaries
- Import from PDF (
.pdf), Final Draft (.fdx), Fade In (.fadein), Fountain, and text - Export to PDF, FDX, Fade In, and Fountain
- Title page editor and structure templates
- X-Ray screenplay analysis
- Writing sprints, tasks, markers, parking, and notepad tools
- Custom themes
- Optional UrAI AI support with AI Model Palette (Ollama or OpenAI-compatible)
Screenshots

Install
If this does not work, see FAQ#1
If this button doesn't work, see FAQ #1
How to install?
Screenshots
Sites
Sources
Exact match
Name match
Description match
No applications found
No applications found matching "{0}"
Try selecting "All architectures" or broadening your search keywords.
Check for typos or try searching with different keywords.
Clear search
{0} results
Failed to load apps.