Sound effects

Sound effects carry a lot of a video. A door that doesn't thud or a transition with no whoosh feels cheap even when the viewer can't say why. This category covers two ways to get them: AI tools that generate an effect from a description, and libraries of recorded sounds you can search and license.

Generators such as ElevenLabs Sound Effects take a prompt like "heavy wooden door creaking open in a stone hall" and return a few versions. They are quick for effects that are hard to find in a library, or for odd sounds a game needs. Results vary, so generate several and layer them with recorded sounds when one take is thin.

Libraries are still the backbone of sound design. Freesound is a free community collection where each sound carries its own Creative Commons license. Zapsplat offers free downloads with attribution and paid plans without it. Soundsnap, Pro Sound Effects and BOOM Library sell professional recordings made for film, TV and games. Krotos takes a different route: software that lets you perform footsteps, weapons and creature sounds in real time so they sync to picture.

The checks are the same as for music. Read the license for commercial use, attribution and redistribution. Game developers should look at whether a license allows sounds to ship inside a game build, since that counts as distributing the file. Keep a list of the sounds you used and where they came from.

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7 AI music tools in sound effects

ElevenLabs Sound Effects

by ElevenLabs

Generates sound effects from a text description, from footsteps and doors to sci-fi hums.

  • Works in the browser
  • Developer API

Freesound

by Music Technology Group, UPF

Community library of sound recordings shared under Creative Commons licenses, free to search and download.

  • Free plan or free version
  • Works in the browser
  • Developer API

Zapsplat

Large sound effects and music library with free downloads that need attribution and paid plans that remove it.

  • Free plan or free version
  • Works in the browser

Soundsnap

Subscription sound effects library from professional sound designers and libraries.

  • Works in the browser

Pro Sound Effects

Professional sound effects libraries and bundles licensed for film, TV and games.

  • Works in the browser

Krotos

Sound design software for performing effects such as footsteps, weapons and creatures in real time.

  • Desktop app or plugin

BOOM Library

Sound effects libraries made for film, games and trailers, sold as collections.

  • Works in the browser

File format and quality matter more for effects than for music. For video, 48 kHz WAV files match most editing timelines. For games, check which formats your engine prefers and whether you need loopable ambiences. Short, dry recordings are easier to layer and process than effects that already have reverb baked in.

Organize what you download. A simple folder per category, with the license and source noted in the file name or a text file, saves searching later and makes credit lists quick to write.

Mix effects with care. A whoosh that sounds exciting on its own can bury a line of dialogue, and stacking several loud hits makes an edit tiring. Keep effects a little lower than you think, check them against the music bed, and save the biggest sounds for the moments that matter most in the edit.

Questions about sound effects

Are AI-generated sound effects free to use commercially?

That depends on the tool and your plan. Check the terms for commercial use and whether attribution is needed on lower tiers before you publish.

Can I use Freesound sounds in a monetized video?

Many, yes, but each sound has its own license. Some need attribution and some forbid commercial use. Check the license on each sound page and keep a credit list.

What should game developers check in a sound license?

Whether the license covers distributing the sound inside a game, on every platform you plan to ship to. Some licenses cover video use but not shipping the file in software.

Should I generate effects or use a library?

Use both. Libraries give you clean, tested recordings for common sounds. Generators help with unusual sounds and quick variations. Layering a generated effect with a recorded one often sounds best.

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