99Sounds

99Sounds is a free repository of sound libraries and instrument plugins for producers, editors, game makers, podcasters, and other audio creators. It is best for anyone who needs varied source material without a purchase or credit requirement. The trade-off is a license that blocks redistribution and certain sound-based applications, plus a Catalina compatibility cutoff for its instruments.

Overview

Founded in 2014 by sound designer Tomislav Zlatić in Belgrade, 99Sounds operates as an independent sound-design label rather than a conventional subscription catalog. Its collections cover cinematic effects, drum samples, field recordings, rain, loops, and related categories, so it can supply both musical building blocks and production effects. That breadth makes it a practical starting point for smaller creative projects that cannot justify a paid library.

Royalty-free permission covers personal and commercial work in music, video, games, podcasts, and sound design, and no credit to 99Sounds or an individual library creator is required. The permission is not a resale right: downloaded files may not be sold or redistributed, including as a separate attachment to another work. The license also forbids using the sounds to create noise, white-noise, sleep-sound, or similar apps. Those conditions are manageable for ordinary production, but they rule out products built around repackaging or continuous sound playback.

Key features

Sample and instrument material is supplied in WAV, MIDI, NKI, SFZ, and Serum preset formats, with MIDI and stems included. This combination accommodates mainstream DAW sampling, sampler instruments, and preset-based workflows. It is particularly useful when a project needs editable musical parts as well as rendered effects, although the included stems and source files remain subject to the no-redistribution rule.

Free instrument plugins are offered in VST, VST3, and AU formats. Drumplayer provides twelve drum kits, eight drum slots, stereo and multiple mono outputs, channel volume and pan controls, and a pitch-modulation LFO. The routing options make it more useful for shaping a kit inside a mix than a bare one-shot player. Upright Piano uses four sampled notes per octave and six dynamic layers per note, with adjustable envelope, tremolo, filter, and reverb controls. That layered sampling and set of sound-shaping controls give it more expressive range than a fixed playback patch, while still keeping the instruments free.

Pricing

99Sounds has one plan, Free sounds and plugins, priced at free. It includes free sound libraries and plugins under the site license, with no required trial period or paid renewal. For independent musicians, student projects, video makers, and small game teams, the absence of a purchase makes experimentation low risk. The plan does not relax the license restrictions: commercial use is allowed, but reselling or redistributing the files and building prohibited noise or sleep-sound apps is not.

Platforms

The service is offered on macOS, Windows, and the web. The maker lists VST, VST3, and AU plugin formats, with virtual instruments intended for 32-bit and 64-bit Windows and macOS hosts. macOS Catalina is specifically unsupported, so Catalina users should not choose the instruments without a compatible alternative workflow. The web presence remains useful for accessing the repository even when a host cannot run the plugins.

Who it's for

Choose 99Sounds when you need royalty-free effects, samples, loops, or free instruments for music, video, games, podcasts, or general sound design and can keep the downloaded assets inside your finished work. It suits creators who value multiple file formats, stems, and MIDI without adding attribution lines. Look elsewhere if your product redistributes source audio, is itself a noise or sleep-sound app, or depends on instruments running on macOS Catalina.

Pros and cons

Pros

No-cost access: the sole plan is free, with libraries and plugins included.

Broad creative coverage: effects, recordings, drums, rain, loops, MIDI, stems, and instrument formats support varied projects.

Commercial-friendly licensing: personal and commercial use is allowed without mandatory attribution.

Useful instrument controls: Drumplayer offers flexible outputs and modulation, while Upright Piano includes layered samples and envelope, filter, tremolo, and reverb controls.

Cons

Redistribution is prohibited: you cannot sell the files or pass them on as separate attachments.

App-use restriction: noise, white-noise, sleep-sound, and similar applications are excluded.

Catalina incompatibility: the stated plugin support does not include macOS Catalina.

Alternatives

Sound Effects Libraries and Music Sample Libraries are useful starting points when you want to compare broader categories rather than a single free label.

SoundMorph is the better pick if you want a freemium catalog with a free online version and optional one-time purchases such as its $29 Galactic Assistant. Epic Stock Media suits projects that need a larger paid vault, including an 8,003-effect, 180-plus-GB Trailer Vault for $249, while retaining a free sound vault. Soundly is preferable for desktop searching across a 3,000-plus free library and 10,000 indexed local effects on macOS or Windows. Pro Sound Effects fits buyers seeking themed, one-user lifetime libraries such as Cinematic Dread at $79. Sound Ideas is aimed at larger annual access, with Creator Access at $500 per year and 100 downloads. The Recordist targets buyers wanting an extensive professional collection, including its 92,500-plus-sound complete package. TONSTURM is another paid option to consider. ZapSplat is a web-only alternative whose free Basic plan is MP3-only, capped in downloads, and requires attribution.

Verdict

99Sounds is a strong choice for creators who want a varied, genuinely free source of effects, samples, stems, MIDI, and usable instrument plugins for finished personal or commercial work. Choose it for breadth and zero cost; choose another library if your project must redistribute source audio, power a prohibited sound app, or run the instruments on macOS Catalina.