Everything here stayson your machine.

It turns on when a run starts and off when the run ends. Every frame goes into a pose model running inside this browser tab, which hands back the positions of your head, hands and hips. Those coordinates are what move the sabers.

The video itself is never recorded, never uploaded and never seen by anyone but you. It is not sent anywhere because there is nowhere for it to be sent.

Your name, level, scores and settings sit in this browser's local storage. Music you import or add from search is held in IndexedDB on the same machine along with its artwork. So is each song from the game's own library once it has downloaded. All of it is readable only by this site, in this browser, on this computer.

None of it syncs. Open the game on another machine and it will not know you.

Four downloads and a song search. None of them say who you are.

The tracks that ship with the game download from this site once and then stay on this device. Your first visit to Play fetches one picked at random for you. A track you add by link is fetched from wherever that link points, so that site sees the request the same way it would if you had opened it yourself. A YouTube or Spotify link is looked up by this site instead. It asks that service what the song is called and then searches for it. That service sees the request come from this site and not from you.

When you search a song, the site looks it up and hands back the matches. Nothing ties a search to you. Each answer is cached for up to an hour so it is quicker the next time. A song you add and its artwork come through this site and stay on your device.

Songs you add and web pages you give the quiz count against a daily allowance so one network cannot use them all up. Each count is filed under a scrambled tag of your network address. The tag changes every day and is deleted after two days.

The pose model and the runtime it needs come from Google's and jsDelivr's public file hosts the first time you run the game, and your browser keeps them after that. They are files being fetched and nothing more.

A duel connects your browser straight to your opponent's. Finding each other takes a broker, and this game uses the free public one run by the PeerJS project. It sees a four letter room code and the two addresses trying to meet. After that the connection is direct and the scores travel between the two of you.

Every cut you land in a duel also carries where your hand and saber tip were and how fast they moved at that moment. That is what lets the other players check your score against the song. It is a few numbers per cut and never any video.

Quiz mode downloads a small language model from Hugging Face the first time you switch it on, keeps it in your browser cache, and then runs it here. Whatever you feed it is read on this machine and does not travel with it.

Quiz mode can instead use a language model server you run yourself on this computer, such as Ollama. Your material then goes from this tab to that server and nowhere else, since the game only ever connects to servers on this computer. The address and model you pick are remembered in this browser. An API key, if your server needs one, is kept only until you close or reload the page.

The game counts runs so it can be made better. A count says which tier and song and hall a run used, what it scored, how accurate it was, whether it finished and how the frame rate held up. It counts the seconds the camera could not see you and, if the setup check ran, which step you were stuck on. It names the family your graphics chip belongs to, so a slow frame rate has something to blame. It also says when the camera was refused, when a song or the pose model would not load and when the graphics dropped out, which is the only way those get noticed. Alongside it go the ordinary things a web server sees anyway. Your browser and operating system, whether the screen is a desktop one, its size, and the page that linked you here.

The counts go to PostHog. There is no cookie and no stored identifier, so the same person on two days is two numbers and neither can be traced to the other. Nothing is recorded, nothing on screen is captured, no part of the camera picture or of the skeleton read from it is ever sent to PostHog, and your name, your imported files, the songs you search for, the links you paste and a duel's room code are never part of it. PostHog's servers see an IP address the way every site you open does. It is used to work out which country the visit came from and is then discarded, so the address itself is never stored.

Settings has a switch under Your data called Anonymous stats. Turn it off and nothing is sent at all. Browsers that send Do Not Track or Global Privacy Control are never counted in the first place.

Settings has a Data section with two controls. Reset progress clears your scores and XP and leaves your name alone. Delete all data takes the profile with it.

Clearing site data in your browser does the same job from the outside, and it takes any music you imported or downloaded along too.

SlashBeatz is a workout. You swing your arms and duck and lean for the length of a song. Before a run make sure you can swing a full arm's length in every direction. Move anything you could hit or trip over and keep pets and people out of reach.

Warm up first and take breaks between songs. Keep some water close by. Stop straight away if you feel pain or dizziness or get short of breath. Talk to a doctor before you play if you have a heart condition or an injury or any other reason to be careful with exercise.

The arena lights flash and pulse with the music. A small number of people can have a seizure when they see flashing lights or patterns. It can happen even to someone who has never had one. Speak to a doctor first if you have epilepsy or have ever had a seizure. The same goes if either runs in your family. Stop at once if your vision blurs or a muscle twitches or you feel dizzy or confused. Turn on Reduce flashing in Settings to keep the arena lights to three flashes a second at most. Younger players should have an adult close by while they play. It helps if that adult reads this section first.

SlashBeatz is not affiliated with Beat Games or Meta. Neither company has endorsed or sponsored it or had any part in making it. Beat Saber and Oculus are trademarks of Meta Platforms or its affiliates. They are mentioned here only to credit the game that inspired this one. All other product names belong to their respective owners.

The songs that ship with the game belong to their artists. Each one is credited in the Music panel in Settings.

Certain sound effects and voice recordings in SlashBeatz originate from Beat Saber. These include the sounds heard when a block is cut as well as the tutorial narration and select voice callouts during play. All credit for these recordings goes to Beat Games. They remain the property of Beat Games and Meta Platforms.

Music you import or add by link or find through search is for your own play. It stays on your device and is never shared with other players or posted anywhere. Please only add music you have the right to use.

Hold the rights to a song or anything else here and want it removed? Write to us, and it will be taken down.

SlashBeatz is free to play. You're welcome to play it & share it. Please don't copy it or sell it or pass it off as your own.

It comes as it is. There may be bugs and features can change or go away without notice. You play at your own risk. As far as the law allows the maker is not responsible for any injury or damage or loss that comes from using it.

Play fair in multiplayer. Everyone in a room sees the name you play under and your score. So pick a name you are happy for others to see. Don't tamper with scores or try to overload the site.

Have a question or found a bug? Write to dev@neilblaze.live.