Celtx originates from desktop software built on open, non-proprietary standards and licensed under the Mozilla Public License version 2.0. Feature development and language translations of the application were driven largely by the feedback and volunteer efforts of members of the international Celtx community. In 2013, development, support, and distribution of the desktop software of version 2.9.7 and older was discontinued, and is no longer officially available. But the Windows executable and macOS file of 2.9.7 were still available in June 2014. The 32-bit source code for 2.9.7 is still available for download. The 64-bit source code for 2.9.7 was available until at least August 2015. "Celtx" is an acronym for Crew, Equipment, Location, Talent and XML.
Features
Celtx offers several features to screenwriters and anyone involved in pre-production. ;Writing: Celtx uses an industry standardscreenwriting editor typical for screenplays and stageplays. Celtx also includes a rich text editor module for writing novels. ;Project collaboration, management and storage: Celtx Studio offers project collaboration and online file storage. ;Publishing: Scripts can be uploaded to the Celtx Exchange for public viewing, peer reviews and commentary. ;Scheduling: Celtx supports creation of production calendars, stripboards, shooting schedules, and call sheets. ;Elements: Celtx features thirty-five different elements, such as Actor or Special Effects, that can be added to the project. These elements can have various information added to them, such as media or text. Celtx allows directors and writers to tag elements within each script. These tagged elements can then be automatically transferred to a script breakdown.
Pre-visualization tools
;Storyboarding: Celtx allows people to create storyboardsequences, which can be printed or viewed using Celtx's built-in animatic playback feature. ;Shot Blocker: The Shot Blocker tool can be used to draw a sketch or setup which can also be added to a storyboard. The Shot Blocker includes pre-loaded icons and imagery for cameras, lights and people that can be tagged with text, and tools for drawing lines, arrows, shapes and text.
