How to check what your clipboard manager sends to the internet
A clipboard manager sees everything you copy — passwords, tokens, private messages, unpublished work. So "it's private" deserves more than a marketing line. Here's how to check for yourself, in about ten minutes, what any clipboard manager actually sends over the network.
Why this is worth ten minutes
Privacy policies describe intent. Network traffic is fact. If an app makes no outbound connections while you use it, it cannot be leaking your clipboard — no promise required. The tools to confirm this are on your Mac or a free trial away.
Method 1 — Little Snitch (clearest)
- Install Little Snitch (a network monitor) and open its Network Monitor.
- Quit the clipboard manager you want to test, then relaunch it.
- Use it normally for a few minutes — copy text, images, files; open the panel; paste.
- Watch the app's row in Little Snitch. Note every domain it connects to, and when.
Expect to see connections only for things you'd predict: an update check, or license validation if you entered a key. Continuous traffic while you copy and paste is the red flag.
Method 2 — built-in tools (free)
No Little Snitch? Use what's already on macOS:
- Activity Monitor → Network tab: watch the app's sent/received bytes while you copy and paste.
- Terminal:
nettop -p <pid>shows live connections for a single process (find the pid in Activity Monitor).
What to look for
- Traffic tied to copying/pasting — the thing that should never need the network.
- Analytics or telemetry domains — connections that fire on launch or in the background.
- Sync endpoints you didn't enable — cloud upload that's on by default.
- Silence — the best result: nothing while you work.
What Copydrop's traffic looks like
We'll state ours plainly so you can check it against the method above. In normal use Copydrop makes zero network calls. The only times it talks to the network are:
- Update checks (Sparkle) — no personal data attached.
- License validation — only if you enter a key; the key and a device label go to our merchant, nothing else.
Your clipboard history itself is a local database on your disk. There's no account, no telemetry, no analytics in the app, and no sync unless a future opt-in feature is explicitly turned on. Password-manager content is never captured. Don't take our word for it — run Method 1 or 2 during your free trial.
The honest bit: "zero network calls" means during normal clipboard use — not that the app never touches the network at all. An update check is a feature, not a leak. The point is that what you copy never travels.
Do the same for any app
This method isn't about us — run it on whatever clipboard manager you're considering, including free and open-source ones. An app that stays silent while you copy has earned the "private" label. That's the bar worth holding every tool to.
Verify it yourself — free for 4 days
Full app, no card, no account. Then $8.99 once — one-time, no subscription.
Try Copydrop freeZero network calls in normal use. Your clipboard never leaves your Mac.
Related: keep passwords out of your clipboard · pay-once managers · best clipboard managers