Jemma

Press ⌘C twice to keep what you copied.

A menu bar app for macOS. Double ⌘C saves the selection as a note. The last 50 notes live in a dropdown, and the newest ten are a retrievable back to clipboard via keyboard shortcuts. Built for the shell commands, IDs, snippets and URLs you need again ten minutes later.

Mac App Store · macOS 15+ · 14-day trial, then $5.99 once · no subscription

Keys

`⌘C` `⌘C`	Save the selection. The first press still copies as usual.
`⌃⌥V`	Open the dropdown from anywhere. Rebindable.
`⌘1`–`0`	Copy note 1–10 while the dropdown is open.
`⇧⌘1`–`0`	Delete note 1–10. Hold `⇧` to see delete on every row.

Scripting

Copy a note by position from a shell, Raycast, Alfred or anything else that opens URLs:

# newest note to the clipboard
open -g jemma://copy/1

Save from a pipe without touching the clipboard. Turn on Save from scripts in Settings, then add this to your shell config (macOS 15 ships jq):

jemma() { open -g "jemma://save?text=$(jq -sRr 'rtrimstr("\n") | @uri')"; }

kubectl get pods | jemma

Any app or web page can open a jemma:// link, so this is off by default. When it's on, every save shows a confirmation, notes are labelled jemma://save, and saves are limited to 10 a minute.

Any app's Services menu also has Save to Jemma, which doesn't need the ⌘C listener.

Behaviour

Plain text only, up to 1 MB per note. Saving the same text again moves the existing note to the top.
It keeps the newest 50 notes. Auto-delete after 1–30 days is optional.
Each note records the source app and, in Chromium browsers, the page URL.
Export every note to one Markdown file, with times, source apps and URLs.
The double-press window is adjustable from 250 to 600 ms. The menu bar icon can be hidden.

Privacy

Notes are stored locally in a SwiftData store in a 0700 folder under Application Support. Nothing syncs and nothing is sent.
It needs Input Monitoring for a listen-only event tap. The tap only matches ⌘C and never blocks, delays or logs keystrokes.
It skips pasteboard contents marked org.nspasteboard.ConcealedType or TransientType, which is what password managers set. 1Password, Bitwarden and Passwords are also ignored by default, and you can add more apps.
No account, no analytics, no Dock icon.