Fathom Reader

Load a .fathom document to begin reading.

Drag & drop a .fathom file here

or

New to Fathom?

A .fathom file contains layered content at different depths. Here are the core concepts:

Front Matter: Start with YAML metadata

--- title: My Document author: Your Name default_layer: 1 layers: 1:Summary, 2:Details, 3:Deep Dive ---

Inline Replacement: Click to expand text with [trigger]{N:replacement}

[the capital]{2:Paris} is beautiful.

Block Insertion: Add new content at deeper layers with {+N:content}

{+2:This appears when you go deeper.}

For complete syntax and examples, read the full specification.