Is 99Sounds free for commercial use?

Yes. 99Sounds is free, and its license allows commercial use.

“All audio files and plugins available for download via 99Sounds are royalty-free for personal and commercial projects.” 99sounds.org/license/

Read on the official page 99sounds.org/license/ on Oct 14, 2026. Not legal advice: terms change, check the page before you ship.

Price

Free

All sounds and plugins are free to download

Commercial use

Yes

99Sounds License (royalty-free)

Credit the author

Not needed

No credit needed

Do you need to credit 99Sounds?

No credit needed. You can use it without naming the source.

“Giving credit to 99Sounds or the individual sound library creator is not obligatory.” 99sounds.org/license/

Can you ship 99Sounds content inside an app or game?

Ship inside your app with conditions.

“You may modify audio files according to your requirements and use them for projects like game development, YouTube videos, composition, music production, podcasts, sound design, and more.” 99sounds.org/license/

Can you use 99Sounds in monetized YouTube videos?

OK in monetized YouTube videos.

“You may modify audio files according to your requirements and use them for projects like game development, YouTube videos, composition, music production, podcasts, sound design, and more.” 99sounds.org/license/

Rules to follow

Do not sell or redistribute the audio files on their own or as a separate attachment, even for free.
Do not use the sounds to build noise, white noise, sleep sound or similar apps.
Credit is optional; you may mention 99Sounds or the library author in the project description.
Bundle the sounds only as part of your own project, such as a game, video or podcast.

Rules for your agent

- 99Sounds (Sound effects). Free downloadable sound effect libraries, sample packs and VST plugins, royalty-free for personal and commercial projects. Price: free; commercial use OK; no credit needed; ship inside your app with conditions.
  Connect: download from https://99sounds.org (no API).
  Get files: Manual download (ZIP archive) from the library pages on 99sounds.org, e.g. https://99sounds.org/free-sound-effects/ (wav).
  Not allowed: Don't sell or redistribute the audio files on their own or as a separate attachment, even for free.
  Not allowed: Don't use the sounds to build noise, white noise, sleep sound or similar apps.
  Not allowed: Credit is optional.
  Rule: Do not sell or redistribute the audio files on their own or as a separate attachment, even for free.
  Rule: Do not use the sounds to build noise, white noise, sleep sound or similar apps.
  Rule: Credit is optional; you may mention 99Sounds or the library author in the project description.
  Rule: Bundle the sounds only as part of your own project, such as a game, video or podcast.
  License: https://99sounds.org/license/ (checked 2026-10-14; details: https://agentgid.com/assets/99sounds/)

99Sounds: full license, pricing and API details →

Free for commercial use: other sound effects

All 24 sources

Source	Price	License	Monetized YouTube	Agent access
Freesound Collaborative database of CC0, CC BY and CC BY-NC sounds with a REST API. agent.md	Free	Commercial: conditions Credit varies	With conditions	API
Pixabay Free photos, illustrations, vectors, videos, music and sound effects; the API covers images and videos only. agent.md	Free	Commercial OK Credit (API) No AI training No bots	With conditions	API
Cuelume Fourteen interaction sound cues for web interfaces, synthesized live with Web Audio and bound to elements through data attributes. agent.md	Free	Commercial OK No credit	—	npm `cuelume`
UI SFX Open-source library of 936 interface sound effects in 12 packs, with a Web Audio player and MP3/Ogg files, installed via npm. agent.md	Free	Commercial OK No credit	—	npm `uisfx`
Adobe Audition Sound Effects Free downloadable ZIP packs of royalty-free, uncompressed sound effects grouped by type, such as ambience, foley and impacts. agent.md	Free	Commercial: conditions	Unclear	Download
BOOM Library Professional sound effects libraries, nature ambiences and sound design plug-ins, sold as buyout or subscription. agent.md	Free tier	Commercial OK No credit No AI training	Yes	Download