Own Your Words
A free offline editor designed for Substack writers
Your writing stays on your machine. No accounts. No cloud. No telemetry.
Everything You Need
Offline First
Write anywhere, no internet required. Your content is always accessible.
Local Storage
Your content stays on your machine. No cloud sync, no data collection.
Rich Editing
Full WYSIWYG editor with formatting, images, and media support.
AI Assist
Generate images, rewrite text, and translate content. Bring your own API key or use local AI.
Spell Check
Built-in spell checking with support for 12+ languages.
Text-to-Speech
Convert your posts to audio for proofreading or accessibility.
One-Click Export
Copy as HTML and paste directly into your Substack draft.
Multi-Tab
Work on multiple posts at once with tabbed editing.
How It Works
Write
Create your post with rich formatting, images, and media
Save
Everything stored locally in .substackeditor files
Publish
Click "Copy for Substack", paste into your Substack draft
Installation Guide
macOS Installation
- 1Download the .dmg file
- 2Open the downloaded file
- 3Drag Substack Editor to Applications
- 4Right-click the app and select "Open" (required for first launch)
- 5Click "Open" in the security dialog
Note: macOS may show a warning because the app is not signed. This is safe - we just haven't paid for a code signing certificate.
Frequently Asked Questions
Ready to Write?
Download Substack Editor and start writing your next post - no internet required.