You do not need an expensive bundle to master your own tracks. A solid free mastering plugin chain can get you a clean, competitive master if you know what each tool is for and use it with restraint. Below are the free plugins worth installing, grouped by job, plus how to put them together.
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Quick answer: a free mastering chain
For most home masters, this order works well:
- Corrective EQ — TDR Nova (free) for surgical cuts and dynamic EQ.
- Glue compression — TDR Kotelnikov for transparent bus compression.
- Tonal EQ — a gentle broad boost or cut to taste.
- Limiter — LoudMax or Kilohearts Limiter to set final loudness.
- Metering — Youlean Loudness Meter to check your LUFS target.
What a free mastering plugin needs to do
Mastering is mostly small moves: balancing tone, controlling dynamics, adding a little loudness and checking the result against a target. The tools you need are EQ, compression, a limiter and a meter. The free options below cover all of those at a quality that holds up on a real release. If you are new to the whole process, start with our overview of what mastering actually does.
Best free EQ for mastering: TDR Nova
TDR Nova is a parametric EQ with dynamic bands, meaning each band can react to level like a compressor. That makes it ideal for taming a harsh 3 kHz region or a boomy low-mid build-up only when it gets loud, instead of cutting it permanently. The free version is more than enough for mastering. Use narrow, gentle cuts for problems and wide, small boosts for tone. For the fundamentals behind these moves, see our guide to EQ and compression.
Best free mastering compressor: TDR Kotelnikov
TDR Kotelnikov is a clean, wideband bus compressor built for exactly this stage. Keep the ratio low (around 1.5:1 to 2:1), aim for one to two decibels of gain reduction on peaks, and use a slowish attack so transients stay punchy. The goal is glue, not squash. If the mix already sounds cohesive, you may not need much compression at all.
Best free limiter: LoudMax and Kilohearts Limiter
LoudMax is a tiny, transparent brickwall limiter that is hard to make sound bad. The Kilohearts Limiter (free in the Kilohearts free tier) is another clean option. Both let you pull down the output ceiling to around -1 dBFS and push the input until you hit your loudness target. If you are unsure how this stage works, our guide to what a limiter actually does covers the controls in plain terms. Do not chase the loudest possible master — past a point you only add distortion and crush the life out of the track. Read our explainer on how loud your master should be before you set the ceiling.
Best free metering: Youlean Loudness Meter
You cannot master to a target you cannot see. Youlean Loudness Meter (free version) shows integrated LUFS, short-term loudness and true peak, so you can match streaming-friendly levels and avoid clipping on conversion. Put it last in the chain and reference it constantly.
Other free tools worth knowing
- Voxengo SPAN — a clear spectrum analyser for checking tonal balance against reference tracks.
- Valhalla Supermassive — not a mastering tool as such, but free and useful for subtle ambience in special cases.
- Ozone (free elements/trial) — iZotope occasionally offers a free Ozone element; handy for an assistant view, though you can do everything above without it.
How to build the chain step by step
Loading the plugins is the easy part; using them in the right order with the right amount is what separates a clean master from a mangled one. Work through the chain like this:
- Gain-stage first. Before you touch anything, drop your master fader or add a utility gain so the mix peaks somewhere around -6 dBFS. Plugins behave more predictably when they are not being slammed at the input, and it leaves you headroom to work.
- Fix problems with corrective EQ. Sweep TDR Nova to find any resonant peak, harsh top end or muddy build-up, then cut it gently. Resist the urge to boost here — this stage is about removing what is wrong, not adding flavour.
- Glue with compression. Bring in Kotelnikov for just one to two decibels of gain reduction. Listen for the mix feeling more like one cohesive thing rather than separate tracks. If you cannot hear a difference, you are probably using it correctly.
- Shape tone with a second EQ. Now you can add character: a wide, half-decibel lift in the air band, or a touch of warmth in the low-mids. Small moves only.
- Set loudness with the limiter. Pull the ceiling to around -1 dBFS, then raise the input until the loudest sections are kissing your target. Watch the gain-reduction meter and back off if it is working hard all the time.
- Check against the meter. Keep Youlean open and confirm your integrated LUFS and true peak land where you want them across the whole song, not just the chorus.
Common free-mastering mistakes to avoid
Most home masters go wrong in a handful of predictable ways. Knowing them in advance saves a lot of frustration:
- Trying to fix the mix at the master. If a vocal is buried or the low end is wrong, mastering cannot rescue it. Go back to the mix. A great master is a small improvement on an already-good mix.
- Over-limiting for loudness. Pushing the limiter hard makes the track louder in isolation but flatter, more distorted and more fatiguing. Streaming platforms normalise loudness anyway, so the loudness war is one you cannot win.
- Mastering too loud in the room. Cranking your monitors makes everything sound good and hides harshness. Master at a moderate, consistent listening level and take regular breaks to reset your ears.
- Never referencing. Without a commercial track in the same genre to compare against, you have no anchor for tone or loudness. Pull in a reference track and match levels when you A/B so the louder one does not simply seem “better”.
- Stacking too many plugins. More processors means more places to introduce phase issues and artefacts. The five tools above are plenty for the vast majority of releases.
How to use these without ruining your mix
Master at a sensible monitoring level, take breaks, and compare to commercial references in the same genre. If your mix needs heavy fixing at the mastering stage, the better move is to go back and fix the mix. For a refresher on getting the mix right first, see our beginner’s guide to mixing your first song. For more mixing and mastering walkthroughs, browse the mixing and mastering hub.
Frequently asked questions
Can you get a professional master with only free plugins?
Yes. The bottleneck is usually the mix and the engineer’s ears, not the price of the plugins. TDR Nova, Kotelnikov, LoudMax and Youlean cover everything a basic master needs.
What order should mastering plugins go in?
A common order is corrective EQ, compression, tonal EQ, limiter, then a loudness meter to check the result. Adjust to taste, but the limiter and meter almost always come last.
How loud should my master be?
For streaming, aim for roughly -14 LUFS integrated with true peak no higher than -1 dBTP, though louder genres often master hotter. Use a meter rather than your eyes or ears alone.
Do free mastering plugins sound worse than paid ones?
Not in any way most listeners can hear. Tools like TDR Nova and Kotelnikov are genuinely professional-grade; paid bundles mainly add convenience, presets and visual feedback rather than fundamentally better sound. Your skill and your mix matter far more than the price tag.
Should I master each song separately or as an album?
Master each track so it sounds its best on its own, then do a final pass across the whole record to even out tone and loudness between songs. The goal is consistency, so no track feels jarringly louder or duller than the one before it.
