SIREN — Sirens, Alarms & Klaxons SFX Generator

🎼 Part of the Background Music Generators collection → https://itch.io/c/8090376/background-music-generators 80+ generators · bundle deals · new tools added regularly · every note in the collection trailer was generated by these tools.

SIREN is a single-file HTML generator that builds 18 emergency sirens, alarms and klaxons from scratch — no recordings, no samples. Pick a sound, shape it with six sliders, hit ↻ New variation for a fresh take, and export a seamless looping .ogg (with LOOPSTART / LOOPLENGTH tags baked in for RPG Maker MZ / MV) plus a .wav.

Civil Defense & Disaster — the big outdoor rotor sirens, with a rotating-head sweep you can dial in:

Tornado Warning (steady dual-tone wail) · Storm / Attack (rise-fall) · Air Raid Siren · Hi-Lo Civil Alarm · All Clear (steady, then wind-down) · Siren Wind-Down (motor-off coast to silence)

Emergency Vehicles — electronic horn-speaker sirens plus a mechanical fire siren:

Ambulance Wail · Yelp · Hi-Lo Two-Tone · Phaser / Piercer · Mechanical Fire Siren · Siren Pass-By (true doppler shift, pan and swell) · Fire Truck Air Horn

Alarms & Klaxons:

Bomb / Missile Alert Pulse · Dive Klaxon (“ah-OO-gah”) · Ship Foghorn · Evacuation Whoop · Fire Alarm Bell

Controls: Level · Pitch · Rate (cycle speed) · Rotation / Drive / Harsh (per family) · Bright · Space (reverb + stereo width). Loop length selector for loops; one-shots export with clean tails. Custom export file name. Same seed + sliders = the exact same sound again.

Use in RPG Maker: drop loops into audio/bgs/ (tornado, air raid, wail, alert pulse…) and one-shots into audio/se/ (pass-by, air horn, klaxon, foghorn, wind-down). Perfect for disaster events, war scenes, modern/urban maps, horror alarms, sci-fi bases and submarine sequences.

License: Royalty-free. Use and sell the exported audio in your games, client work, videos, streams and other products — no attribution required. You may not resell or redistribute the generator itself (this HTML tool).

All sound is synthesized in-browser from pure DSP — no recordings or samples. Original audio; not affiliated with RPG Maker or any rights holder. Produced with AI assistance.

Cheat-sheet
Family Loops One-shots
Civil Defense & Disaster tornado, stormalert, airraid, hilocivil allclear, winddown
Emergency Vehicles wail, yelp, hilo, phaser, qsiren passby, airhorn
Alarms & Klaxons alertpulse, evac, firebell klaxon, foghorn

Exported file names default to siren_ (e.g. siren_tornado.ogg).