Text and markup file formats

Files that are nothing but characters: plain text, and text with formatting marks that stay readable as written. Any text editor opens them.

Formats

.ADOC

AsciiDoc

Plain text markup for technical documents and books, built by Asciidoctor.

.HTML

HyperText Markup Language

The language of web pages: text marked up with tags that browsers display.

.MD

Markdown

Readable plain text with light marks for headings, emphasis, lists and links.

.ORG

Org mode document

Emacs Org mode’s plain text outlines: headlines, tasks, tables and code blocks.

.RST

reStructuredText

Readable plain text markup with directives, used by Sphinx and Python’s docs.

.TEX

LaTeX and TeX source

Plain text with backslash commands that TeX and LaTeX typeset into pages.

.TXT

Plain text

Characters and line endings, nothing more, in an encoding the file rarely names.