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* **Compare**: Ability to compare scripts, so you know what changed between versions.
* **Import**: Screenplay formatted text, Final Draft XML (.fdx), Celtx (.celtx), Fountain (.fountain), Adobe Story (.astx) and Fade In Pro (.fadein).
* **Export**: PDF, formatted text, HTML, RTF, Final Draft XML (.fdx) and Fountain (.fountain).
* **PDF**: Built-in, highly configurable PDF generator. Supports embedding your chosen font. Also supports generating PDFs with custom watermarks, to help track shared files.
* **Free software**: Licensed under the GPL, Trelby welcomes developers and screenwriters to contribute in making it more useful.