Billy Bob Games

HTML5 Slot Machine

Test a five-reel Web Animations demo with manual Spin and optional Autoplay—using no real money.

Loading HTML5 Slot Machine Game…Large games may need a few seconds.

How to Play

  • Press Spin to set all five reels in motion.
  • Enable Autoplay to keep the reels spinning automatically.
  • Uncheck Autoplay to stop the automatic sequence after the current spin finishes.
  • The symbols are randomized for demonstration only; there are no bets, balances, prizes, or cash-out.

About HTML5 Slot Machine

This page runs Johannes Kronmüller's open-source HTML5 Slot Machine, a lightweight proof of concept built with plain JavaScript, CSS, and the Web Animations API.

It demonstrates staggered reel movement and randomized symbols. The jackpot label is visual decoration: this build has no wagering system, player balance, payout calculation, account, or real-money feature.

Controls

  • Spin button: animate all five reels once.
  • Autoplay checkbox: start another spin shortly after the reels stop.
  • Uncheck Autoplay to end the repeating sequence after the active spin.

Goal

Explore the reel animation and generate new five-reel symbol arrangements. This is an interactive technical demo, not a gambling service or a scored casino game.

Desktop and mobile compatibility

Desktop
Works in current desktop browsers that support the Web Animations API. A wider window makes all five reels easier to see.
Mobile
The upstream layout is responsive and the buttons accept touch input. Landscape orientation is best on narrow screens.

Black screen, sound, or loading problems

  1. If the reels are blank, reload and wait for the bundled SVG symbols and JavaScript to load.
  2. If Spin does nothing, disable a script blocker for this page and try a current browser.
  3. If Autoplay will not stop immediately, uncheck it and allow the current reel animation to finish.
  4. This demo has no sound. A silent spin is expected and is not an audio failure.

Gameplay screenshots

HTML5 Slot Machine five reels with Spin and Autoplay controls
The running five-reel demo with its two available controls.

Developer, source, and test status

Last tested
October 9, 2026

Billy Bob Games hosts a browser build of the open-source project and does not claim to be its developer.