The short answer to iZotope RX vs Ozone: these two plugins do completely different jobs. RX is a repair and restoration suite for cleaning up problems in a recording — noise, clicks, hum, mouth sounds, reverb. Ozone is a mastering suite for putting the final polish, loudness and tonal balance on a finished mix. They are not competitors; they sit at opposite ends of your workflow. If you have to pick one, choose the tool that fixes the problem you actually have.
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iZotope RX vs Ozone at a glance
Here is the quick-pick before we get into the detail. Think of RX as the tool you reach for before mixing, and Ozone as the tool you reach for after mixing.
| iZotope RX | iZotope Ozone | |
|---|---|---|
| What it’s for | Audio repair & restoration — removing problems | Mastering — final loudness, tone & polish |
| Where it sits in the workflow | Before/during editing, on individual tracks or dialogue | Last stage, on the finished stereo mix |
| Typical user | Podcasters, video editors, dialogue/post, anyone with noisy recordings | Producers & engineers finishing tracks for release |
| Signature tools | Spectral De-noise, De-click, De-hum, Mouth De-click, Dialogue Isolate, spectral editor | Maximizer, Master EQ, multiband dynamics, Imager, Match EQ, assistant |
| Runs as | Standalone app + plugins | Plugin + standalone; sits on your master bus |
| Buy it if… | Your recordings have noise, hum, or clicks you can’t fix by re-recording | Your mixes are clean but sound quiet, dull or unfinished next to commercial tracks |
Best repair/clean-up pick: iZotope RX
Best mastering pick: iZotope Ozone
What iZotope RX actually does
RX is a dedicated audio-repair suite. Its whole reason to exist is to remove things from a recording that shouldn’t be there. It became an industry standard in film and TV post-production precisely because it can rescue dialogue that would otherwise be unusable, but the same tools are just as useful for podcasts, YouTube voiceovers, interviews recorded in a bad room, and vocal takes with distracting background noise.
The centrepiece is the spectral editor — a display that shows your audio as a spectrogram (frequency over time) rather than just a waveform. That lets you literally see a cough, a phone buzz, a dropped pen or a bit of hiss, select it like a Photoshop layer, and remove it while leaving the rest of the audio intact. Around that sit a stack of specialised modules:
- Spectral De-noise — learns the fingerprint of a constant background noise (air-con, hiss, room tone) and subtracts it.
- De-hum — kills electrical hum and its harmonics (the 50/60 Hz buzz from bad grounding or cheap gear).
- De-click and De-crackle — for digital clicks, vinyl crackle and edit pops.
- Mouth De-click and De-ess — tames lip-smacks, saliva noises and harsh sibilance in close-mic’d voice.
- De-reverb / Dialogue Isolate — pulls a voice out of a boomy room or a noisy environment.
What RX does not do is make a finished track loud and release-ready. It has no mastering maximizer, no genre-matching assistant for your master bus, no loudness target for streaming delivery in the way Ozone does. It’s a surgeon, not a finisher. If your recording is already clean, you may barely touch it.
What iZotope Ozone actually does
Ozone is a mastering suite. Mastering is the final stage of production: you take a completed stereo mix and give it consistent loudness, a balanced tone, glue, width and the competitive level that lets it sit comfortably next to commercial releases on Spotify, Apple Music or a club system. Ozone bundles every module you need for that into one chain that sits on your master bus.
The core modules include a Maximizer (the loudness/limiting stage), a Master EQ for surgical and tonal shaping, multiband dynamics and a multiband compressor for controlling the low end and glueing the mix, an Imager for stereo width, and tools like Match EQ that let you match the tonal balance of a reference track you love. There’s also an assistant feature that listens to your mix, compares it against genre targets and suggests a starting chain — a genuinely useful head-start for anyone new to mastering.
The thing Ozone can’t do is fix a bad recording. If there’s hiss, hum, a click or room reverb baked into the mix, Ozone will happily make all of it louder along with the music. Mastering works on the whole stereo file — it can’t reach inside and surgically remove a single cough the way RX can. Clean first, then master.
How the two fit together in a real workflow
This is the key point that the “vs” framing hides: in a serious project you often use both, at different stages. A realistic order of operations looks like this:
- Record. Get the best raw take you can.
- Repair with RX. Clean each problem track — de-noise the vocal, de-hum the guitar DI, remove the clicks — before it ever hits the mix.
- Mix. Balance, EQ, compress and add effects in your DAW. (New to this stage? Start with our beginner’s guide to mixing your first song and the EQ and compression fundamentals.)
- Master with Ozone. Put the finished stereo mix through Ozone for tone, glue and loudness, hitting the right LUFS target for streaming.
So RX handles step 2 and Ozone handles step 4. They never overlap — one removes problems from the source, the other finishes the result. If you’re unsure what mastering even involves, our explainer on what mastering is gives the full picture, and if you already own Ozone you’ll get more from our iZotope Ozone review.
Which one do you actually need?
Match the tool to the problem you keep running into:
Choose RX if your recordings are the weak link. Podcasters recording in an untreated room, video editors dealing with location dialogue, anyone capturing interviews on the road, or a producer who keeps getting vocal takes with air-con hum and mouth noise — RX solves problems that no amount of mixing or mastering can. If you find yourself thinking “I wish I could just delete that noise,” you need RX.
Choose Ozone if your recordings are already clean but your finished tracks sound quiet, dull or amateur next to commercial releases. If your mix is solid and you just can’t get it loud and polished, that’s a mastering gap, and Ozone fills it — especially for producers who don’t want to send every track to an outside mastering engineer.
Choose both if you’re running a full production chain end to end — say a one-person studio handling recording, mixing and release. Many producers get RX for the source clean-up and Ozone for the finish. iZotope frequently bundles them together in larger collections, which is usually cheaper than buying each separately.
One more practical note: both come in tiered editions (a lighter, cheaper version and a full “Advanced” version with more modules). For most home-studio users the standard editions cover the essentials; the Advanced tiers add specialist modules that mainly matter to full-time post-production and mastering pros. Check the iZotope site for current editions and pricing before you buy.
Frequently asked questions
Is iZotope RX or Ozone better for mastering?
Ozone, without question. Ozone is purpose-built for mastering — maximizer, master EQ, multiband dynamics, imaging and reference-matching all in one master-bus chain. RX has no mastering tools; it’s for repairing and cleaning audio before you ever get to the mastering stage. For mastering, Ozone is the right tool.
Do I need both iZotope RX and Ozone?
Only if you handle the whole chain yourself. If you record in less-than-ideal conditions and master your own tracks for release, owning both makes sense — RX cleans the source, Ozone finishes the master. If your recordings are already clean, you may only need Ozone; if you never self-master, you may only need RX. iZotope’s bundles often include both for less than buying them apart.
Can Ozone remove background noise like RX does?
Not really. Ozone works on the finished stereo mix and has no dedicated noise, hum or click removal comparable to RX’s spectral tools. Anything you don’t clean before mastering just gets louder. Remove noise with RX at the track stage first, then master with Ozone. For a fuller finishing overview, see our guide to mastering and the mixing & mastering hub.
