How to generate a sound effect
- Describe the soundWrite what you want to hear and where it happens, for example “footsteps on gravel, slow walk.”
- Set the durationChoose a length between 3 and 15 seconds. Short hits like a click need 3–4 seconds; ambiences like rain benefit from 10–15.
- Enter the codeType the 5-digit security code shown next to the button.
- GeneratePress Generate SFX and preview the result on the right.
- Download and layerSave the clip and drop it into your editor. Generate a few variations and layer them for a richer sound.
Writing prompts for realistic sound effects
Sound designers describe sounds by source, action, material and space. Including all four gives the AI sound effect generator much more to work with.
- Source: what makes the sound (a car, a dog, a crowd, a sword).
- Action: what it is doing (skidding, barking twice, cheering, being unsheathed).
- Material: what surfaces are involved (wet asphalt, wooden floor, metal).
- Space: where it happens (small kitchen, empty warehouse, open field, inside a car).
Compare: “explosion” vs. “distant explosion echoing across a desert canyon, low rumble fading out.” The second prompt tells the AI distance, environment and how the sound should end.
20 sound effect prompts to try
Copy any of these into the prompt box. Each one is written to produce a usable 5–15 second clip.
- Home and everyday: “coffee maker brewing and gurgling,” “keys jingling then a front door unlocking,” “microwave beep three times,” “dog barking at the mail carrier,” “phone vibrating on a wooden table.”
- Nature and weather: “heavy thunderstorm with rain on a tin roof,” “crickets on a summer night in the countryside,” “ocean waves on a sandy beach,” “wind howling through pine trees,” “campfire crackling.”
- City and transport: “New York street traffic with distant sirens,” “subway train arriving at a platform,” “pickup truck engine starting on a cold morning,” “crowd cheering in a baseball stadium,” “school bell ringing in a hallway.”
- Games and fantasy: “retro 8-bit coin pickup,” “magic spell charging up then releasing,” “sword clash with metallic ring,” “sci-fi door sliding open with a hiss,” “dragon roar in a cave.”
Why use an AI sound effect generator
Exactly the sound you imagine
Not finding the right clip in a library? Describe it and get something made for your scene.
Video and short films
Footsteps, doors, whooshes and ambiences for YouTube, TikTok and student films.
Game development
Pickups, hits, UI clicks and creature sounds for indie and jam games.
Podcasts and audio drama
Scene-setting ambiences that make storytelling feel real.
Use it commercially
Generated sound effects can be used in monetized and commercial projects.
No account
Generate right away in your browser, on desktop or phone.
Sound effects generator at a glance
| Feature | Free on Speechma |
|---|---|
| Input | A text description of the sound |
| Clip length | 3 to 15 seconds |
| Output | Audio clip to preview and download |
| Commercial use | Included |
| Sign-up | Not required |
Need longer background audio, such as a full ambient bed or a theme? Use the AI Music Generator for tracks from 30 seconds to 8 minutes.
Editing tips: making AI sound effects fit your project
- Trim the start. Cut any silence before the sound begins so it lines up exactly with the action on screen.
- Fade ambiences. Add a half-second fade in and out to rain, wind or crowd clips so they do not start or stop abruptly.
- Loop for longer scenes. Generate a 15-second ambience, then crossfade two copies to cover a full minute.
- Layer for impact. A big punch in a fight scene might combine a “body hit,” a “cloth whoosh” and a “low thud.”
- Mix under dialogue. Keep ambiences quieter than the voice. If you use AI narration from text to speech, lower the effects by a few decibels during speech.
Frequently asked questions
Is the AI sound effect generator free?
Yes. It is free with no account and no credit card. Each sound just needs a 5-digit security code.
How long can a sound effect be?
Between 3 and 15 seconds per generation. For longer ambient audio, loop or crossfade several clips, or use the music generator.
Can I use the sound effects in commercial videos and games?
Yes. Commercial use of the generated audio is included, so you can use it in monetized YouTube videos, apps, games and ads.
Why does my sound effect not sound right?
Short prompts leave a lot to chance. Add the material and the space, for example “glass bottle shattering on a concrete floor in an empty garage,” and try a few variations.
Can it make voice sounds or speech?
The sound effects tool is designed for non-speech sounds. For spoken words, use text to speech or the AI voice generator.
Will I get the same sound if I use the same prompt again?
Usually not exactly. Each generation is a new variation, which is useful: run one prompt three or four times, keep the best take, and save the others for layering or for repeated actions like footsteps so they do not sound copy-pasted.
Do I need any software?
No. Everything runs in your browser. Download the clip and import it into any video or audio editor, such as CapCut, Premiere Pro, GarageBand or Audacity.
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