Pen Fight operated by LetsCrak

Play Pen Fight Online With Friends

Last updated: 4 September 2026

One person makes a room and shares the six-character code; everybody else types it in. Up to four players sit at the same desk, with live voice chat built in, so you can hear what everyone thinks of the shot you just played. There is nothing to download and no account to make — a room code and a browser is the whole requirement, on a phone or a laptop, anywhere in the world.

Make a room now and send the code to whoever you were going to send it to.

Play Pen Fight

Starting a room, step by step

  1. Open penfight.site and put in a name. It is the name on the desk, so it can be anything.
  2. Choose to make a room. You get a six-character code and a link.
  3. Send the link — the person who opens it lands straight in the waiting area with the code already filled in.
  4. Anyone who has the code instead of the link can type it into the join box on the front page.
  5. When everybody is in, start. The desk is set and the first player flicks.

The room lives for as long as people are in it. Leaving does not end the match for everybody else, and a room that empties out goes away on its own — so a code is worth exactly one session, and there is no room list to browse and nobody to run into who you did not invite.

Two, three or four at a desk

Two players is the classic game and the one everything else is measured against: alternate flicks, whoever survives takes the round.

Three and four change the shape of it. On a bigger desk the player you knock off is not necessarily the one who is beating you, so scoring stops being a race and becomes a count:

At the desk Scoring Match ends
2 players Rounds won. First to three (best of five) or four (best of seven).
3 or 4 players 1 mark per pen you send off, 2 marks for taking the round. The full distance is played; the highest marks wins.

The marks rule is what stops a four-way turning into three people waiting for each other to move. Taking somebody off the desk pays even if you go off yourself two flicks later.

Voice chat, built in

Every Pen Fight room has live voice chat, in the browser, with nothing to install. Press the microphone button in the corner and the rest of the desk can hear you. There is no separate call to set up, no second app to join and no account — the room code that gets people to the desk is the same thing that gets them into the conversation.

This is the part that makes an online pen fight feel like a real one. The game is thirty seconds long and the best thing in it lasts about three, and almost all of the fun of the original is what the other person says immediately afterwards. Playing it in silence is playing a different, worse game. So voice is not a feature bolted to the side of the desk — it is the half of the desk that everything else was built around.

The mic is off until you turn it on

Nothing is transmitted until you press the button, and pressing it again stops it at the microphone rather than just muting the far end — so "off" means the sound is not leaving your device, not that somebody else has politely stopped listening.

Muting somebody else happens on your machine for the same reason in reverse: the room is never told who is ignoring whom.

It goes straight between the phones

The conversation is peer-to-peer over WebRTC. Our relay carries the handshake — a few kilobytes once, when two people first find each other — and then nothing at all. It never carries a syllable of the audio and could not decode one if it did. A room of four costs the server a short burst at the start and silence afterwards.

Choosing WebRTC rather than encoding the audio ourselves is also why it works on an iPhone or an iPad. Opus is mandatory in WebRTC and Safari has had it since iOS 11, which means every device in the room can talk — not just the ones on desktop Chrome.

It is built to survive a phone on mobile data

Voice packets do not arrive evenly, and one that turns up after its slot has passed is a hole in the middle of a word. The cushion that absorbs that is kept per listener and per talker, and it grows when one particular person keeps arriving late — rather than being a single delay picked for whoever in the room has the best connection. The friend on a bus does not make everybody else sound laggy, and does not have to be the one who drops out.

Or say it without saying it

If voice is more than the moment calls for — a lesson still going on, a sleeping flatmate, somebody you have only just met in a room — there are four reactions on the desk: laugh, speechless, angry and quiet. They cover most of what anybody needs to say after a shot that went in off the edge, and they need no microphone permission at all.

Sending the round on afterwards

When a match ends there is a share that shot button, and what it gives you is the whole round as a link. Not a video and not an upload: the round is described exactly by its starting seed and the list of flicks that were played, and all of that fits inside the address itself. Whoever opens it watches the round replay on a real desk with real physics, at full quality, having downloaded nothing.

It also means a replay link cannot leak anything, because there is nothing on a server to leak. The round exists in the message you sent and nowhere else.

What you need

Common questions

How many people can play Pen Fight online?

Up to four in one room, at the same desk, at the same time.

Is there a time limit on a room code?

A room exists while people are in it. Once everybody has left, the code stops working — so share it when you are ready to play rather than an hour before.

Can I play Pen Fight with a friend on a different device?

Yes. One of you can be on a phone and the other on a laptop; the desk and the physics are identical on both, and the controls are the same drag-and-release either way.

Does Pen Fight have voice chat?

Yes — every room does, in the browser. Press the microphone button and the rest of the desk can hear you. There is no separate call to join and no app to install, and the mic stays off until you turn it on.

Does voice chat work on iPhone and iPad?

Yes. The voice runs over WebRTC, which Safari has supported since iOS 11, so an iPhone in the room can talk as well as a laptop can.

Can other people hear me before I press the button?

No. Nothing is captured or sent until you turn the microphone on, and turning it off stops it at the microphone rather than muting it at the other end.

Does online Pen Fight cost anything?

Rooms, voice and replays are free.

Can I play by myself?

Yes — there is a bench of eleven bot opponents, from one who swings at everything to one who does not miss. How to play covers how the ladder unlocks.

Six characters is the whole invitation.

Play Pen Fight

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