Primer: choosing a file format for upload

Six formats are named on the register: .txt, .docx or Word, PDF, .md, and two screenplay formats, FDX and Fountain. A tool that names none of them takes text by paste, or by an upload of unnamed type. From 7 source pages, read 2026-09-25; no maker pays to be listed.

Plain text is the safest: every tool with a paste box takes it, and four name .txt files. Word files are where most manuscripts live, but only three tools name them. PDF keeps a screenplay's layout and is named by three.

Markdown is plain text with a few marks for emphasis and headings; its own project page, dated December 2004 for version 1.0.1, describes it as both a syntax and a converter to HTML.

1From the register

Markdown 1.0.1 (18 KB) — 17 Dec 2004

Daring Fireball, Markdown project page

ECMA-376 Office Open XML file formats 5th edition, December 2021

Ecma International, ECMA-376 page

Currently, LTX Studio only supports plain text (.txt) files.

LTX Studio, script to video page

Start from a one-line brief, or import a screenplay PDF and build straight from the pages you already wrote.

M Studio, pricing page (workflow and plans)

• Text files, version
  Markdown 1.0.1 is dated 17 December 2004Daring Fireball, Markdown project page / since 2004-12-17 / checked 2026-09-25
• Word files, the standard behind .docx
  ECMA-376 defines the Office Open XML file formats; the 5th edition is dated December 2021Ecma International, ECMA-376 page / since 2021-12-01 / checked 2026-09-25
• Formats, FAQ: supported formats
  Plain text (.txt) files only, per the FAQLTX Studio, script to video page / recorded 2026-09-25
• Formats, step 01: start a film
  A one-line brief, or a screenplay imported as PDFM Studio, pricing page (workflow and plans) / recorded 2026-09-25
• Formats, home page
  The home page adds a URL, PDF, image, video, audio or an idea as starting pointsPexo, home page / recorded 2026-09-25
• Formats, upload script
  A .txt or .docx file is uploaded, or text pasted directlyPippit, one sentence one drama guide / recorded 2026-09-25
• Formats, FAQ: how does it work
  PDF, FDX, Fountain, Word or TXT scripts, or a shot list imported from ExcelStoryboarder.ai, home page FAQ / recorded 2026-09-25

2One intake, followed through

After the intake question in “Choosing a file format for upload”, SceneMixer describes what it does with the text:

Voices are matched from a library of sampled preset voices, or supplied by you as an upload of your own audio.

SceneMixer, AI Character Voices — “Can SceneMixer clone a voice?” (read 2026-10-13)

The clip you upload is used for one thing: to be read.

SceneMixer, The Clip You Upload for a Remake: Where It Is Stored, What It Is Used For, and What It Is Never Used For (read 2026-10-13)

3Other primers

• Primer: characters, words and pages
• Primer: what a breakdown returns

The primers describe what vendors wrote on their intake pages; product behaviour beyond the wording is not claimed.