Having quality plugins is a must when you’re mastering in the box. You’re going to need a good EQ, compressor, limiter, and a handful of other tools to get the best sound possible.

• Free Mixing And Mastering Vst Plug-ins
• Free Mastering Vst Plug-ins

37 Best Free Vst Compressor Plugins For Mixing & Mastering By Monji Omer / Plugins & DAW In this post, we will talk further about the 37 best VST compressor plugins great for mixing and mastering. It can be frustrating not knowing exactly how to get your music comparable to your favourite mixes. Our plugin REFERENCE is packed with powerful tools and never seen before insights to help you get closer than ever to the sound of your favourite music. Check out our new site for even more FREE DOWNLOADS! Our plugin REFERENCE is packed with powerful tools and never seen before insights to help you get closer than ever to the sound of your favourite music. Mixing and mastering utility plugin. Regular price £49.00. Sale price £49.00 Sale. 7 Best FREE Limiter VST / AU Plugins for Mastering. If you’re looking for a limiter plugin, here is a list of some of the best FREE limiters VST / AU plugins used by many music producers and sound engineers. LoudMax certainly is among the most popular free limiter plugins.

In some cases, companies have created plugins with a combination of functions allowing you to manipulate just about every part of your music in one interface. Others have compiled bundles of their “best” software to give you everything you need to complete a successful master.

If you’re new to mastering or a professional looking for new tools to up your game, we’ve compiled a list of some of the best mastering plugins out there.

Let’s check them out.

Top 9 VST Plugins for Mastering

1. FabFilter Mastering Bundle

As a company, FabFilter is still relatively young in the audio processing world. Even still, they happen to make some of the most forward-thinking VST plugins on the market. Grabbing the Mastering Bundle will equip you with FabFilter’s best tools all in one bundle.

The Mastering Bundle comes with the following plugins:

• Pro-C mastering compressor – Comes with a variety of compression modes allowing you to change the tone of your mix. You can also work in M/S or L/R mode which is a big deal in the mastering world.
• Pro-Q – By far this EQ is one of the most flexible on the market. The Pro Q comes equipped with a very precise frequency analyzer allowing you to make better mastering decisions all while use 24 bands simultaneously! Left/Right and Mid/Side processing are both available here as well.
• Pro-L Limiter – Want that brick wall sound? You go it here. You get 4 limiting modes to help shape and tone your track. The Pro-L also include some other parameters an adjustable Lookahead control and Channel Linking options for transient detection.

Overall, we like the FabFilter Mastering bundle for its flexibility. What makes these plugins much more powerful, however, is that they can also be used for in mixing sessions as well. In fact, you’d be hard pressed to find a competent mixing engineer that doesn’t have FabFilter products in their toolbox.

Pros

• Can apply to a wide variety of situations
• Amazing for detailed tasks
• L/R and M/S options

Cons

• Pro-C Output volume can get hot quickly

2. iZotope Ozone 9

Izotope is a well-established brand and has created some of the best mastering software. Ozone, Izotope’s flagship product, is an all-in-one solution for mastering in the box and has been favored by engineers for mastering solutions, since it’s first iteration.

Ozone 9 acts as a wonderful standalone solution for all your mastering needs. Probably the best feature is that you can use their plugin outside of your DAW, helping to create a much-needed alternative perspective.

While inside your DAW, you can easily bring up the Ozone’s wide selection of processors like their dynamics section, limiter, exciter, and more. Even though the plugin looks complicated at first glance, Izotope tries to make it as beginner-friendly as possible by including a ton of presets. Browse the preset library to find something that best matches your sound or better yet, use that as a starting point to “dial-in” your sound.

We couldn’t end our Izotope overview without mentioning their Master Assistant. This is by far the one feature that sets it apart from other mastering VSTs. Just click a button and the Master Assistant will analyze your song before deciding on the best combinations of settings. A truly customized “done for you” solution. Just be aware you will most likely still need to do some tweaking.

Pros

• A Vast catalog of processing modules
• The Master Assistant
• Beautiful and intuitive interface

Cons

• No zoom controls for trimming and fading
• Lacks song-spacing ability for Compact Discs

3. Eventide Elevate Mastering Bundle

It’s no secret that Eventide has high-quality reverb plugins, but many producers and engineers aren’t aware of their mastering bundles. In the Elevate bundle, you’ll get four quality plugins but the crown jewel lies in the Mastering/Limiting plugin, which will give you all the loudness you want all while maintaining as much dynamics where possible.

After journeying through a 26-band filter, the signal hits a limiter with dynamic transient emphasis and spectral clipper controls. A nice feature with the filter bank is that the built-in AI assists with setting the amount of gain, speed and transient variation into each band. The AI can also be applied to other limiting parameters, which can go a long way in helping to create a more natural end result. Obviously, tweaking is a must as that’s where all the fun is!

Beyond the limiter, you get another 3 high-quality plugins.

1. Equivocate – An EQ with 26 bands based on the human ear, giving you natural sounds for your mix.
2. Saturate – is a spectral clipper, to help with the peaks.
3. Punctuate – A transient shaper that lets you breath some life back after limiting.

Elevate is basically a complex processing plugin which can automatically raise the loudness of your tracks without sacrificing the original tone or character. Whether you want to use the vast amounts of presets or experiment your heart out, it’s totally up to you.

Pros

• Auditory filter bank concept is unique
• Offers a transparent and natural sound
• Intuitive interface

Cons

• filters on Equivocate are not very flexible

4. Audified MixChecker

The Audified MixCheker isn’t a set of mastering tools like you’d normally think. It’s a software bundle comprised of multiple speaker simulations for mix reference. You can toggle through 12 different buttons allowing you to hear how the mix would sound in different environments such as inEar, radio, PA, etc. The plugin comes with a total of 62 models giving you a variety of reference points.

Because the plugin is set up to “monitor” and not “tweak”, there aren’t any modifications built-in. What you can do is rename buttons, check distortion and noise levels as well as change speaker models. In terms of presets, you can save 5 at time, allowing you to bundle together your favorite hi-fi models into a single button.

A limiting factor that we see for this VST is that you need to be listening on a set of really good monitors to begin with. If you want to replicate a pair of Ns-10’s for example, you won’t be doing yourself any favors listening on cheap speakers.

With that said, it doesn’t mean the plugin won’t replicate a reliable impression of the different speaker models. It shines in the fact that it can give you different mixing perspectives, allowing you to make broad-stroke decisions you may not have thought of without it. For improving the overall sound of your record, we’re happy to report that MixChecker Pro is a great tool.

Pros

• detailed response provided by the simulations
• Mono mode
• A plethora of models to choose from

Cons

• Play back system could affect the accuracy
• Uninspiring interface

5. Mastering the Mix EXPOSE

Think of Expose like a second set of ears on your mix – a set that has the knowledge to tell you exactly where your record needs improvement and what you can do to make the necessary changes to come out with a professional sound. It only takes but a few seconds to load and could potentially be the audio lifeline you have been looking for.

Just load the program and drag your song into the dashboard. From there, you can choose between a number of different presets for your track like Spotify, YouTube, SoundCloud, CD, Broadcast, etc. Surprisingly, the software provides a vast amount of information on the peaks, dynamic range, overall loudness, phase, stereo information, etc. If any audio issues arise, they are highlighted in red so you can visualize exactly where the problem(s) exist.

An interesting feature is that you can highlight your mouse over the problem area and the software will give detailed information about the problem as well as some suggestions on how to fix it.

Free Mixing And Mastering Vst Plug-ins

Basically, Expose is a data-driven plugin helping to get your mixes to the level of some of the top masters in the business. This mastering VST plugin certainly isn’t the flashiest on our list, but it is high-quality and one that will help you craft flawless mixes every time.

Pros

• Details the technical issues in your records
• Offers helpful tips and solutions
• Budget-friendly

Cons

• Some users have seen errors when uploading professional masters

6. Softube Weiss MM-1

Weiss first made a name for themselves with the DS1-MK3, a master processing unit that became a centerpiece for a number of mastering studios worldwide.

The Softube Weiss MM-1 mastering VST replicates the best components of the DS1 hardware and transfers them into a digital format for the modern ages. The unit comes with 5 different limiting options: Loud, Transparent, Wide, Punch, and De-ess.

For a more natural and precise sound, the MM-1 comes with a Mix knob (should be standard in all plugins), as well as an Amount knob.

Even though the MM1 doesn’t have as many features as some of the other plugins on our list, it does have a top notch mastering algorithm, allowing you to easily compete with any song on the radio today.

Pros

• Straightforward interface with professional results
• Very Transparent
• Includes 5 different modes

Cons

• For the price, it’s not as flexible but the few things it does, it does well!

7. Leapwing Audio DynOne 3

Oh no, not ANOTHER multiband compressor. We get it! But the Dynone 3 is definitely worth taking a look at. The Dynone really stands out in its ease of use. While other multiband compressors feel like they need a lot of tweaking to “get it right”, the Dynone has a very intuitive workflow and makes it easy to dial in the right tone.

A unique feature of the Dynone is that it automatically applies variable timing values in a transient dependent manner, assisting you in achieving the most natural sound possible. You can also blend in the processed signal with the original to give your sound a bit more impact.

The controls on the unit are enhanced specifically for mastering and they include stereo linking percentages, variable RMS vs. peak detection, smart variable controls, and an adjustable retina interface with a smooth and ultramodern design.

In our opinion, there is no digital multi-band compressor available right now, better for mastering, than the Leapwing Audio Dynone 3.

Pros

• Interface is very intuitive and simple to operate
• Non-intrusive compression design
• Helps to achieve loudness while still sounding natural

Cons

• fixed crossover points

8. Softube Weiss DS1-MK3

Ask any engineer and they’ll tell you that the Weiss DS1-MK3 is the gold standard for mastering applications. The reason is because the MK3 provides compression, limiting and de-essing all while retaining the original sound. If you’re after the “perfect” master, you can certainly achieve it with the DS1-MK3.

Though the DS1 plugin is based on the hardware unit from the 1990’s, the plugin actually offers much more versatility. It can perform the same tasks as the original unit and then additional tasks that the DS1 never could while giving you a number of settings to play around with.

The DS1 allows you to de-ess mid-side separately and compress with variable soft-knee settings, while also having one of the most transparent brick wall limiters of any mastering plugin.

If you’re looking for a plugin that allows you to maintain dynamics all while creating a mix that feels punchy, natural and loud, then the DS1 algorithm is unparalleled.

Pros

• Can be transparent or add character
• Waveform view is very informative
• RMS and True Peak limiters are helpful

Cons

• Lacking presets. I guess if you’re a pro, you don’t need them
• A bit pricey

9. Sonnox Mastering Collection

At first glance, the Sonnox Mastering Collection might not look like much, but included in the bundle are some of the most dynamic and transparent plugins on the market. To make things easier for beginner and intermediate mastering engineers, Sonnox hand-picked these plugins specifically from their extensive collection.

Included in the bundle are the following five plugins:

• Oxford Dynamic V3 compressor
• Oxford EQ V3
• Oxford Inflator V3
• Oxford Limiter V3
• Fraunhofer Pro-Codec

The V3 compressor offers musical-sounding compression while retaining sonic clarity throughout. Besides that, the compressor ships with six independent parameters allowing for more control.

The EQ V3 is transparent and flexible allowing you to boost or cut with confidence. Want to achieve overall loudness without adding any pumping compression? That’s where the Inflator shines as it adds both power and presence, without the dreaded “pump”, perfect for helping the focus points stick out.

The true-peak limiter, which lies at the end of the chain, offers enhanced accuracy and maximum loudness. This plugin Collection bundle is all you need for mastering, making it easy to create a reliable chain every time you sit down to master a song.

Pros

• High-quality and transparent
• The Transient Modulator is a unique take on dynamic processing
• Available in multiple formats

Cons

• Can be costly for non-professionals

Nailing the Master

Before purchasing any mastering plugins, be aware that the ones you choose will ultimately shape the entire mix. It’s impossible to polish a turd (excuse my French), but you can certainly make a really good mix sound even better with the right tools. Whether you are shaping the EQ curve of an entire album or adding in some power and emotion to a hit single, having quality plugins can make all the difference.

Due to their undeniable complexity, a seasoned engineer can easily spend hours mastering a single vocal track…

Afterall, compressing and paying special attention to levels on the most dynamic instrument only makes sense.

Luckily, there are several free vocal mastering VST plugins to assist in the process without breaking the bank.

In this article, we’ll dive into a couple of compressors, exciters, equalizers, and noise gate VSTs that mimic many of the tools used by the pros to give mixes the extra polish they need.

Free Plugins For Mastering Vocals

Compressor VSTs

With vocal audio constantly wavering between high and low levels, a good compressor is nothing short of essential to the final mastering process. Check out some of these options to achieve a cohesive, condensed vocal sound.

Related: Proper Compression Settings for Vocals, Best Paid Vocal Compressors

OTT by Xfer Records

Pick it up here

With a simple yet sleek user interface, this plugin is approachable to engineers at all ends of the spectrum. The VST consists of 3 bands and is geared towards trap/electronic genres. OTT has the standard controls of any compressor: In/Out Gain, depth, and time without the clutter from any unnecessary bells and whistles. Each band is equipped with a modest visualizer, allowing you to see how your sound is being altered at different frequency ranges.

Although some producers may find the lack of options control-wise limiting, OTT is quick to get you to the sound you desire without wasting unnecessary time. Overall, the price is more than right, and OTT does an excellent job at evening out levels.

DC1A by Klanghelm

Pick it up here

If you’re looking for a simple compressor to give your vocals a bit more of an analog/classic feel, the Klanghelm DC1A is an excellent free plugin to start with. Its most notable feature is the 4 built-in presets with deep, relaxed, negative, and dual mono compression modes.

To add to its retro vibe, the VST has an embedded meter that looks like those on vintage rack mounts and is just as useful. The meter itself is easily understood and has a delineated red threshold so you can tell whether or not you’re clipping even with just a quick glance. The main focus of the plugin is the input and output, nothing else really besides the compression modes, making it a great option for beginners.

Moreover, Klanghelm produces a bulkier compressor VST entitled DC8C, so DC1A acts as a great trial run before investing in a paid plugin. For a seasoned engineer, this VST may be oversimplified, but those looking for efficiency or that classic mono sound, this is an excellent choice.

Equalizers (EQ) VSTs

When mastering a vocal, especially in pop/more current styles of music, producers commonly boost/cut out frequencies to help it stand out a bit more in the master mix. Here are a couple of free EQs that can fulfill all of your vocal mastering needs.

Related post: Best Paid EQ plugins for Vocals

ReaEQ by Reaper

Pick it up here

In general, this EQ plugin is great for the entire production process, but it also has a couple of key features that lend themselves particularly towards vocal mastering. For example, the VST has a dial-in frequency feature that allows the user to enter precisely what frequency he/she would like to be emphasized or lowered. You are able to add an unlimited amount of bands to give absolute clarity to the vocal and add polish to its final master. The bandwidth can be widened or narrowed with a few mouse clicks, streamlining the process.

Moreover, each band has a separate bypass toggle, meaning that you can easily switch one on/off to compare a sound before/after processing. ReaEQ comes equipped with high and low pass filters, bands, much more. The central visualizer makes it easy to locate all of your bands. Although the plugin is not the most aesthetically pleasing, it certainly works well and has a lot of features that normally come with paid plugins.

It is a great plugin to download as a beginner, but able to translate into more mature mastering practices with its potentially highly specified input/output values. ReaEQ is a superb tool and comes as a part of the Rea PLugs bundle with many other useful VSTs.

Luftikus By Lkjb

Pick it up here

This EQ is super useful in achieving a retro sound, as it is a digitized version of an analog-style Equalizer. Luftikus is set up like a traditional rack mount and has 5 fixed-frequency EQ bands with corresponding knobs. This feature could be seen as limiting during the mastering process as you cannot type in specific frequencies in the same way that you can with previously mentioned ReaEQ.

However, if you’re mastering a vocal bus with multiple vocal tracks, having fixed bands can help simplify the process and give you a little boost without being excessive. In addition, the VST has an added “mastering” mode which removes superfluous features to get you in and out of mastering efficiently. Luftikus has a separate section dedicated to boosting the high-end frequencies and a couple of preset options between 2.5-40K Hz which is particularly useful during the vocal mastering process.

Outside of the presets, the high-end boost has a knob that can be altered for a more specific vocal top-end boost. The plugin has a “keep gain” button designed to make changes appear more subtle than drastic while EQing, ideal for mastering. The colorful interface makes it exciting to use and Luftikus proves to consistently create masters with a bit more of a vintage feel.

Nova-67P by Vladg/sound

Pick it up here

The Nova-67p is a hybrid between a compressor and an equalizer making it a fine resource for mastering. The plugin is centered around the main visualizer where you can view the waveforms and respective bands. It’s nice that you’re able to see the waveforms in realtime, especially since vocals are fickle and quick to change from one level to the next. Since it also acts as a compressor, there is a small level meter as well to prevent clipping the vocal tracks.

This unique combination makes the VST a one-stop-shop for vocal mastering. Although sidechaining is traditionally done within the mixing stage, it is certainly worth mentioning that this plugin has sidechain capabilities built-in, along with high and low pass filters. It comes with attack, release, and ratio knobs and a separate toggle for mastering. If you’re looking to EQ or compress exclusively, this plugin may not be the best choice as the two components are designed to be used together in the mastering process.

For those looking to do both processes anyway, this plugin certainly accelerates mastering and will give you a more put together sound as the EQ and compressor interact with one another beautifully.

Noise Gate VSTs

A less common but underrated gating possibility is centered around the vocals. Condenser and other common microphones, often pick up unneeded frequencies that can cloud your vocal clarity during the mastering process. In order to eliminate this, try out one of these free noise gate plugins and place it on a vocal track.

Related post: Best Paid Noise Reduction Plugins

preFix by Variety of Sound

Pick it up here

Prefix acts as a couple of plugins built into one with EQ, sidechain, compression, and phasing built-in. Similarly to Nova-67P, the features are meant to be used with one another without external interference. The noise gate feature is notable as it has specified attack, release, hold, and pre-gate knobs allowing the user to hone in on which frequencies they’d like to be ducked.

Although this plugin is best used during the mixing process, it can be a great reference point during mastering since it includes so many of the tools needed to create a polished track. If someone was stuck on a vocal mix and wanted to be able to visualize a finished or mastered product, preFix could be placed on the corresponding vocal bus and quickly adjusted to give the user a vague idea of the polished product. Since there are so many controls and a lack of a frequency visualizer, this plugin can certainly be intimidating and time consuming for a beginner. However, a reference track on its own is extremely valuable, especially for something as nuanced as vocals, and when mastered, preFix is as effective as comparable costly VSTs.

GGate by GVST

Pick it up here

This plugin is as simple as it can get, but don’t let its minimal approach fool you- GGate is very powerful and is straightforward enough to be added to all kinds of vocals. The plugin consists of 3 knobs: The threshold, attack, and fade; Each pretty self-explanatory in their own right. GGate has a dry/wet meter so that the gated signal can be played alongside the unaltered signal. This opens the door to parallel processing for vocals, which can make a significant difference in the listener’s experience.

Moreover, the “fade” knob is suited to create subtle changes in the overall level of a vocal track. For those looking to give a more processed/clear sound to vocals, i.e those centered around commercial/pop genres, this plugin may prove to be insufficient. However, if you’re in a pinch or just need to eliminate a minute level of noise without being too obvious, you can’t beat the control offered by GGate.

Exciter VSTs

In the same way it is helpful to boost the preexisting high-end of vocals in order to bring the sound more upfront during mastering, exciters generate artificial/organic tones typically in the 3K range and above.

Related post: Best Paid Exciter Plugins

Thrillseeker XTC by Variety of Sound

Pick it up here

This exciter is based around analog-style retro sounds and combines a traditional exciter/saturator with a 3-band EQ. Each set EQ range has a separate knob and bypass button so that different frequency ranges can be enhanced independently. This is particularly useful in scenarios where one is utilizing a vocal bus and wants to master an overall sound without emphasizing unwanted tones/frequencies.

The plugin has a “Mojo” and Drive section, catered to leveling out the amplitudes of generated frequencies running parallel to the dry vocal. Moreover, the VST can be switched in between blue or black versions depending on how precise an engineer desires the finished master to be. Thrillseeker in this way lends itself to a variety of genres and applications. Although it is somewhat limited in being linked to retro or vintage type sounds, the VST is absolutely worth a try at no cost.

BuzVintageMaxi by Buzzroom

Buzzroom has created a true exciter plugin with BuzVintageMaxi. The VST is very minimal, with two main knobs: gain and ceiling for the threshold level of the audio signal. The plugin is known for adding thick, warm sounds to any track it is applied to. This can be especially useful for mastering female vocals, where sometimes the upper register can lose warmth/low-end frequencies when translated to an audio signal. It has two included processing modes, normal and deep, to cater to the depth of harmonics applied to the signal.

Although this plugin cannot be used to master an entire vocal tracks alone due to its lack of complexity, it certainly produces a warm vocal within a short amount of time. It’s definitely worth a try, even just train your ears on what a warm/fat vocal should sound like.

Free Mastering Vst Plug-ins

Modern Exciter by Antress

Pick it up here

Antress has a number of strong plugins free for download on their website. Modern Exciter has a user interface resembling a standard rack mount and is not overly muddled by too many controls. Harmonics can be added to low or high frequencies and adjusted with their respective knobs. This lends itself well to mastering vocals as different voices will have different areas in which they need more widening depending on the frequency of the dry audio signal. Modern Exciter includes a VU meter, which especially lends itself to mastering since it helps display the average level of the processed signal.

If you want more of a retro sound, this VST has a built-in analog preset. Moreover, the VST processes in stereo and has separate left and right channels appropriately. The plugin does not have a whole lot of controls which may seem to limit to some, but it notably separates the high and low ends to organically fill in vocal frequency gaps.

Quick Tips For Mastering Vocals

In general, the mastering process involves adding the final polish to a preexisting mix. This includes leveling, preparing for distribution, and making sure that the project as a whole is cohesive. Let’s dive into a couple of tips that illustrate what that process is like for vocals.

#1. Keep Mixing and Mastering Separate

With any aspect of a song, especially vocals, it’s important that you’re giving the mixing and mastering processes their own space. This is because the philosophy behind mixing involves deep adding/subtracting, sometimes involving an entire rework of a track.

When you master, you are looking to polish and heighten the parts of something that is already complete. By keeping the two operations independent of one another, you allow for your vocals to be better thought out in terms of context (mixing) and the overall level/vibe of the song as a whole (mastering). A good master on a bad mix still produces a poor track. Therefore, make sure you do your homework before jumping into the world of mastering plugins- The real work comes out during mixing.

#2. Know your Vocals

What type of voice is presented on your track? What kind of frequency is it lacking? Is your vocal the focus of your song or more in the background? It’s vital that you consider these questions deeply before beginning the mastering process so that you have a clear roadmap to lead you down the right mastering path with plugins that fit accordingly.

#4. Use a Reference Track

Vocals are by far the trickiest aspect of understanding audio engineering since they are so unique. It can be extremely helpful to use a reference track during the mastering process to get your vocal exactly where you desire. Moreover, so many of these free plugins include bypass features, sometimes for each separate band, which makes it easy to compare against your model track.

Mastering is the icing on top of the cake, not the cake itself, but that does not diminish its importance- especially with vocal tracks. A good master sets your music apart and is a mark of a seasoned producer. Try out one of these free vocal mastering VSTs on your next track to get you one step closer to the coveted warm, thick vocal our ears crave.