Celtx (.celtx) Obsolete
Celtx desktop projects are ZIP archives wrapping the script in XML — the single most-requested rescue format since Celtx went cloud-only.
Format facts
- Created
- 2001
- Created by
- Greyfirst Corp (now Celtx Inc.)
- Status
- Obsolete — no current software writes it
- Reference
- Wikipedia: Celtx ↗
Software that uses it
Native format of Celtx.
What it carries
- the screenplay text with typed elements from Celtx desktop projects
- multi-file project archives (script extracted, production assets inventoried)
What it can't represent
- non-script project assets (storyboards, schedules) are not converted — the script is
- cloud-era Celtx exports differ from desktop .celtx files
Where it came from
Celtx (2001) was the free pre-production suite many writers started on; the desktop app was discontinued in 2013 in favor of cloud subscriptions, and in 2022 the cloud itself stopped creating legacy file types — orphaning local .celtx files for good.