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Trelby

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What Trelby is

Trelby is a free, open source program for writing movie screenplays. Its editor applies screenplay formatting and pagination, with auto-completion and spell checking for drafting. Writers can work in draft, WYSIWYG, or fullscreen views. A character name database contains over 200,000 names from various countries. Reports can cover scenes, locations, characters, and dialogue, and script comparison shows changes between versions.

Trelby imports screenplay-formatted text, Final Draft XML, Celtx, Fountain, Adobe Story, and Fade In Pro files. It exports PDF, formatted text, HTML, RTF, Final Draft XML, and Fountain. Its configurable PDF generator can embed a chosen font and add custom watermarks. The program supports Windows, macOS, and Linux. The download page lists Trelby v2.4 and installation methods including PyPI, Fedora, Debian/Ubuntu, Flatpak, and a generic tarball. The project points users to its FAQ and GitHub issue tracker for support. Trelby is licensed under the GPL, and Gwyn Ciesla is listed as its maintainer.

Who it suits

Trelby suits screenwriters who want a dedicated editor that handles screenplay layout and pagination. It also fits writers who need to import or export several screenplay formats, compare script versions, and use a free, GPL-licensed program on Windows, macOS, or Linux.

What it does well

  • The editor handles screenplay formatting and pagination.
  • Draft, WYSIWYG, and fullscreen views are available.
  • Reports cover scenes, locations, characters, and dialogue.
  • Script comparison shows changes between versions.
  • Imports and exports several screenplay file formats.
  • The configurable PDF generator supports chosen fonts and custom watermarks.

What to know first

  • No free trial is offered; the listed plan is free.
  • The download page lists Trelby v2.4.
  • The project directs support questions to its FAQ and GitHub issue tracker.

Plans

PlanBilled and limitsPrice
TrelbyFree and open source screenwriting softwareFree

As trelby.org lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

  1. Visit https://trelby.org/.
  2. Choose an installation route for Windows, macOS, or Linux from the download page.
  3. Install using a listed option such as PyPI, Fedora, Debian/Ubuntu, Flatpak, or the generic tarball.
  4. Start a screenplay or import a supported format.
  5. Use the FAQ or GitHub issue tracker for support.

Verdict

Choose Trelby if you want a free, open source screenplay editor with formatting, script comparison, and broad import and export support. Its PDF tools can embed a selected font and add a watermark. The project directs users to its FAQ and GitHub issue tracker for support.

Questions

Is Trelby free?

Yes. The listed Trelby plan costs nothing, and the software is free and open source under the GPL.

Which operating systems does Trelby support?

Trelby supports Windows, macOS, and Linux.

What file formats can Trelby import?

It imports screenplay-formatted text, Final Draft XML, Celtx, Fountain, Adobe Story, and Fade In Pro files.

What formats can Trelby export?

It exports PDF, formatted text, HTML, RTF, Final Draft XML, and Fountain files.

Can Trelby compare script versions?

Yes. Script comparison shows changes between versions.

Who maintains Trelby?

Gwyn Ciesla is listed as its maintainer.

Facts from Trelby's own pages

Downloads
The download page lists Trelby v2.4 for Windows, MacOS, and Linux installation methods including PyPI, Fedora, Debian/Ubuntu, Flatpak, and a generic tarball. · trelby.org, 8 Oct 2026
Export formats
It exports PDF, formatted text, HTML, RTF, Final Draft XML, and Fountain files. · trelby.org, 8 Oct 2026
Formatting
The editor enforces screenplay formatting and pagination, and includes auto-completion and spell checking. · trelby.org, 8 Oct 2026
Free plan
Yes · trelby.org, 20 Sept 2026
Import formats
It imports screenplay-formatted text, Final Draft XML, Celtx, Fountain, Adobe Story, and Fade In Pro files. · trelby.org, 8 Oct 2026
License
Trelby is free and open source software licensed under the GPL. · trelby.org, 8 Oct 2026
Maintainer
The listed maintainer is Gwyn Ciesla. · trelby.org, 8 Oct 2026
Name database
Its character name database contains over 200,000 names from various countries. · trelby.org, 8 Oct 2026
PDF tools
Its configurable PDF generator supports embedding a chosen font and adding custom watermarks to generated PDFs. · trelby.org, 8 Oct 2026
Purpose
Trelby is a screenwriting program for writing movie screenplays. · trelby.org, 8 Oct 2026
Reports and comparison
It can generate scene, location, character, and dialogue reports, and compare scripts to show changes between versions. · trelby.org, 8 Oct 2026
Security
The maker pages reviewed provide no security or compliance claims. · trelby.org, 8 Oct 2026
Support
The project directs users to check its FAQ and report issues through the GitHub issue tracker. · trelby.org, 8 Oct 2026
Views
It offers draft, WYSIWYG, and fullscreen views. · trelby.org, 8 Oct 2026

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