New in 3.0

OnEdit

Native macOS editing with Smart Actions, review-before-replace text generation, movable editor tools, and clearer unsaved-tab cues in version 3.0.

Try OnEdit

On-device Smart Actions for selected text

Review sheet before replacements apply

Movable toolbar edge options

Dirty-tab markers and direct window sizing

OnEdit 3.0 Smart Actions review sheet

Version 3.0 highlights

Smart text actions, flexible tools, and clearer document state.

Smart Actions powered by Apple Intelligence

Rewrite, shorten, adjust tone, summarize, or explain selected text with an on-device review flow before anything changes.

Editor tools, right where you want them

The toolbar now defaults to a right-side rail and can move to the right, left, top, or bottom edge from View > Toolbar Edge.

Clearer tabs and exact window sizing

Unsaved tabs now show asterisks, and Window > Set Window Size... adds direct width and height controls.

OnEdit Mermaid preview and export in dark modeOnEdit Mermaid preview and export in light mode

Render Mermaid in Markdown, then export it.

OnEdit turns Mermaid fences into local diagrams inside Preview. Copy Image or Save PNG directly from the preview card, while fenced code blocks render more faithfully across the rest of the document.

Local Mermaid runtime, no cloud renderer required
Copy Image and Save PNG built into Preview

SQL aware and multi-window friendly.

OnEdit adds SQL syntax highlighting and file associations, so database files open in the right mode immediately. External opens also prefer the active window when possible, which keeps multi-window setups tighter and easier to manage.

OnEdit editor with project files in dark modeOnEdit editor with project files in light mode

Local-first behavior that stays out of your way.

OnEdit keeps editing, preview, and file-open behavior consistent while staying focused on local workflows. The result is a macOS editor that feels predictable across windows, opens the right files in the right context, and keeps your work on-device.

Local editing and preview workflows
Privacy-first macOS experience
OnEdit privacy-focused experience in dark modeOnEdit privacy-focused experience in light mode