Open Source · Cross-Platform · Free

An AI-assisted WYSIWYG Markdown editor.

Download for Mac View on GitHub

Markdown

WYSIWYG Markdown editing.

Text styles

This is **bold**, this is *italic*, this is ~~~~struck through~~~~, and this is ==highlighted==.

Bold · Italic · Strikethrough · Highlight

Headings

# Chapter one

## Getting started

### Installation

Headings, H1 through H6

Lists

1. Draft the outline

2. Write the first pass

- Research references

- Peer review

- [x] Ship the release

- [ ] Announce it

Unordered · Ordered · Task lists

Math

Euler's identity: e^iπ + 1 = 0

\sum i=1 n i = n(n+1) / 2

LaTeX, inline and block

Code

function quiet(agent) { return agent.joinSilently(); }

Syntax highlighting, any language

Diagrams

Draft → Agent review → Publish

Mermaid flowcharts, sequences, graphs

AI features that join in naturally.

Works with ChatGPT, Claude, an API key, or a custom endpoint.

AI Completion

The quietest tools are the ones you forget are even there, working alongside you.

Ghost-text suggestions, Tab to accept

AI Grammar Fix

We has reviewed the proposal and is ready to move forward.

Inline fixes, one click to apply

Agent Writing

## Migration plan

1. Export existing records…

"Tighten the intro paragraph" agent editing ···

Ask it to write or edit, right in the doc

Download

Get Levis

Free, open source, MIT licensed. Current version v0.6.6.

macOS

"Levis is damaged and can't be opened." We're still saving up for an Apple Developer membership, so the app isn't notarized yet — it's safe and open source. Run this once in Terminal and it opens normally:

xattr -cr /Applications/Levis.app

Apple Silicon

Download .dmg

brew install --cask catvinci-studio/tap/levis

Windows

x64

Download .exe or .msi

Linux

x64

Download .AppImage

.deb .rpm