A reader that also lets you fix the line you just read.

Switch between reading and editing

Click the pencil in the toolbar, or press Command-E. The rendered page becomes the whole document as text. Click the eye, or press Command-E again, to return to reading.

Save, undo, or put the file back

Press Command-S to save. Press Command-Z to undo your typing and Shift-Command-Z to redo it. Revert discards the unsaved text and reads the file from disk again.

Unsaved work stops live reload

Imark normally follows every save made by another app. As soon as you type, it stops following the file so an external save cannot erase your unsaved work. The close button shows the edited dot, and closing the window, quitting Imark, or opening another document asks what to do first.

If the file changes somewhere else

Imark checks the file on disk before every save. If another app or person changed it after Imark read it, Imark refuses the save instead of writing over that work.

Open a larger change in a full editor

Open in stays in the toolbar while you edit. Use it to send the file to Cursor, VS Code, Zed, Sublime, Claude, or ChatGPT when the change grows beyond a quick correction. Imark runs nothing on your machine and asks nothing of your accounts.