Windows Clipboard History: 25 Items, and It Syncs

You copy a password out of an email, paste it into a login box, and think no more about it. Somewhere behind that is a list, and most people have never seen it.

Whether that list exists on your machine is worth two seconds of checking, because it behaves differently from the clipboard you think you are using.

I checked this machine before writing any of it. The setting that controls clipboard history does not exist here at all, which tells you something useful about the default.

Whether it is even on

Start here, because the answer decides how much of this matters to you.

⛔ Read on this machine: the registry key that stores clipboard history settings is not present. Not set to off. Absent, because the feature has never been switched on.

⚡ Documented by Microsoft on its clipboard page: "To turn your clipboard on for the first time, select Windows logo key + V, and then select Turn on."

⭐ That wording gives it away. You have to turn it on, and until you do, Windows keeps only the single last thing you copied.

⚠️ Press Windows and V right now. If you get a small panel offering to turn it on, you have never used it and nothing has been stored.

What it keeps, and for how long

Three numbers, all from Microsoft, and all smaller than people assume.

⭐ Microsoft states the count: "Your clipboard history is limited to 25 copied entries."

⚡ And the size: "Your size limitations are 4 MB per item. Text, HTML, and Bitmap file formats are supported."

⚠️ So a large file you copied is not in there. Copying a file in File Explorer copies a reference, not four megabytes of content.

⛔ Twenty-six copies and the first one is gone. The list rolls, which is why people cannot find something they copied an hour ago.

⚠️ And if nothing pastes at all, history is not your problem. Copy and paste failing outright has its own causes.

The restart rule, and its exception

The exception is the part that matters.

⚡ Microsoft says: "Clipboard history gets cleared each time you restart your PC, except for the items you've pinned."

⭐ Pinning is the whole risk. A pinned item survives every restart, and it survives the button that clears the rest.

⚠️ Microsoft's own description of the clear function says it removes everything on your device and in the cloud "except pinned items". The exception is stated in both places, deliberately.

⛔ So if you ever pinned something sensitive, clearing history does not remove it. Unpin it by hand, from the same panel.

The syncing, which is the part nobody notices

It is off until you switch it on, and then it is not local any more.

⭐ Microsoft says what ties it together: "The sync feature is tied to your Microsoft account or your work account, so remember to use the same login information on all your devices."

⚡ That is the point where a copied password stops being on one machine. It travels to every device signed into that account.

⚠️ There are two modes and the difference is real. Automatic sync sends everything you copy. The other setting sends only what you choose, item by item.

⛔ On a shared or work machine, pick the manual one. The same reasoning applies to anything left signed in when a machine changes hands.

What to do about it, in order

Five steps, and the first two take a minute.

⚡ Press Windows and V and see what is actually there. You cannot decide anything until you have looked.

⭐ Scroll to the bottom of that panel. Anything pinned sits apart, and those are the items that outlive everything else.

⚠️ Clear the list from the panel's own menu, then check the pinned items again, because they do not go with it.

⛔ Then decide about sync deliberately. Off is the private choice, manual is the useful compromise, automatic is the convenient one.

⚡ And stop copying passwords out of anything. A password manager fills the box without the clipboard being involved at all.

When you actively want it on

Because this is not a scare story, and the feature is genuinely good.

⭐ Anyone assembling something from several sources. Quotes, links, references, code. Twenty-five slots is a lot of back and forth saved.

⚡ Pinning is excellent for things you type constantly. Your address, an account number you look up weekly, a signature block.

⚠️ Pin what is boring and keep what is sensitive out of it. That single rule makes the whole feature safe to use.

⛔ And if you type the same thing far more than 25 times a day, a text expander beats a clipboard. Different tool, better fit.

What was and was not read here

Stated rather than implied.

⛔ Nothing was switched on to test it. The finding here is only that the settings key does not exist on this machine.

⚠️ The counts, the size limit, the restart rule and the sync behavior are Microsoft's own wording, quoted from its page rather than summarized from it.

⭐ Ours is the ordering, the pinning warning, and the split between what belongs in a clipboard and what does not.

Status: read against Microsoft's clipboard documentation, 28 August 2026, with the local setting state checked on Windows 11 Home. ⛔ Nothing was enabled and no clipboard content was read.

Is clipboard history on by default in Windows?

No. Microsoft's own instruction is to press the Windows key and V and then select Turn on, which is only there because it starts off. On the machine checked here the registry key that stores the setting did not exist at all, which is what a feature that has never been enabled looks like.

How many things does Windows clipboard history keep?

Twenty-five. Microsoft states the limit as 25 copied entries, with a 4 MB size limit per item, and text, HTML and bitmap supported. Once you reach 26 the oldest one falls off the end.

Does clipboard history clear when I restart?

Yes, apart from anything you have pinned. Microsoft says history is cleared each time you restart your PC except for pinned items, and the same exception applies to the clear button. Pinned entries have to be removed by hand.

Does my clipboard sync to other devices?

Only if you turn syncing on, and then it is tied to your Microsoft or work account across every device signed in with it. There are two modes: one sends everything you copy automatically, and the other sends only the items you pick. On a shared machine, pick the second.

The Short Version

• Clipboard history is off until you turn it on with Windows and V.
• On this machine the setting key did not even exist yet.
• Microsoft's limit is 25 entries and 4 MB per item.
• Text, HTML and bitmaps only. A copied file is a reference, not content.
• History clears on restart, except for anything pinned.
• The clear button also skips pinned items. Unpin them by hand.
• Syncing is account-wide, so a copied password travels.
• Pin the boring things and keep passwords out of it entirely.

Where to Next

Press Windows and V before you read any further advice. Whatever is on that panel is the only thing that decides whether this matters on your PC.

Look at the pinned section specifically. Those items outlive restarts and survive the clear button, so they are the ones worth checking.

If you have syncing on, choose deliberately between sending everything and sending only what you pick. The second setting exists for a reason.

Then make it a habit to pin the dull, repetitive things and never the private ones. That one rule keeps a genuinely useful feature safe.

If you have ever found something in that list you had completely forgotten copying, tell me what it was in the comments. I suspect a lot of people are about to look for the first time.