Ozone 12 EQ is the most mix-and-mastering-oriented freebie in the lineup, and it comes from a pedigree that already carries serious weight. Native Instruments presents it as a standalone EQ from iZotope’s Ozone 12 mastering suite, with Transient/Sustain mode, a Delta button for hearing exactly what is being changed, and Mid/Side processing for more precise stereo work. In practice, that gives producers a flexible EQ that can handle both problem-solving and creative tone shaping.

This is a strong option for mixing engineers who want tighter control over impact and clarity, but it is equally useful for producers working on beats, electronic tracks, vocals, or stereo busses. It is not just a “free EQ.” It is a free EQ with a mastering brain and a workflow designed to help users hear what they are doing instead of guess their way into trouble.

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Vocal Doubler is exactly the kind of plugin that becomes a quiet studio staple because it solves a common problem quickly. iZotope describes it as a free vocal production plugin designed to add a natural doubling effect, creating more richness, width, and depth without forcing users into a maze of unnecessary parameters. Its interface is deliberately simple: vertical movement adjusts stereo separation, while horizontal movement controls human variation.

That simplicity is its superpower. Vocal Doubler is ideal for lead vocals that need more spread, hooks that need a stronger presence, backing vocals that should feel bigger, and pop, rap, indie, or electronic productions where a vocal has to sit forward without becoming harsh or overprocessed. It is also light on CPU, which makes it easy to keep around across larger sessions.

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Vinyl remains one of iZotope’s most recognizable free plugins for a reason. It simulates dust, scratches, warp, and mechanical noise, and the current page also highlights a Lo-fi effect designed to evoke the saturated, worn tone associated with late-1980s hip-hop resampling. In plain studio language, Vinyl is a quick route to nostalgia, patina, and believable sonic age.

It works beautifully on keys, drums, samples, intros, transitions, vocals, and full texture layers. Used gently, it adds character. Used more aggressively, it can make a polished modern sound feel like it was discovered in a dusty basement with excellent taste in records. It is still one of the easiest and most effective free ways to inject lo-fi personality into a mix.

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Ozone Imager is the stereo specialist of the group, built to widen, narrow, and visually monitor a mix with speed and clarity. The current version emphasizes fluid visuals, full resizability, and a smoother Stereoize mode for turning mono material into stereo without resorting to reverb or simple doubling tricks. It also includes multiple vectorscope displays so users can see how left and right channels are behaving.

This makes Ozone Imager useful far beyond mastering. It is equally handy on synths, cymbals, guitars, pianos, and backing elements that need a little more width, as well as on low-end material that benefits from being tightened toward the center. For producers who like hearing width but also want to see it before accidentally launching the mix into stereo nonsense, it is a very strong free utility.

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Trash Lite is the chaos merchant of the collection, but in a disciplined way. iZotope’s page positions it as the free Lite mode of Trash, centered on the signature distortion module. It includes more than 60 distortion types, an XY pad for blending up to four settings, Drive modulation, a Tilt control for spectral shaping, plus Autogain and a Limiter to keep output levels under control while things get gloriously unruly.

For drums, synth bass, leads, vocals, parallel effects, re-amping chains, and sound design, Trash Lite is one of those free plugins that can instantly make a session more exciting. It is not just for destruction. It can add warmth, bite, edge, or full-on creative vandalism depending on how far you push it. Some plugins politely ask to be inserted. Trash Lite kicks the door in.

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Audiolens deserves a separate note because it still appears on the iZotope free plugins hub, but its current product page explicitly says that it is no longer available. iZotope now says its defining reference-track workflow lives inside Tonal Balance Control 3. Historically, Audiolens was a clever referencing utility for capturing and comparing the sonic profile of tracks from sources running on your computer, including streaming services.

So yes, it is part of the page’s story, but no, it should not be presented as an actively downloadable free plugin today. If you want that workflow now, the official product direction points you toward Tonal Balance Control 3 instead.

Official Audiolens page |
Tonal Balance Control 3