FREE Mastering Plugins you Should Check Out !

Mastering is one of the final stages in music production. This is where you bring your mix to life by tuning frequencies, adding compression, saturation, stereo width, and finally bringing your overall loudness to the right level. If you are just starting off in mastering and looking to buy plugins that are dedicated to mastering, it can be extremely expensive. So here are some great free options that you can try out and see which one suits you the best to the kind of music you do.
Plugins are categorised in no particular order.
ANALYSERS
Manalyzer By Melda Productions
Download Link - https://www.meldaproduction.com/MAnalyzer
System Requirements
â–· Windows 8 / 10 / 11 (64-bit) [ VST / VST3 / AAX compatible host (64-bit) ]
â–· macOS 10.14 Mojave to macOS 12 Monterey (64-bit) [ VST / VST3 / AU / AAX compatible host ]
â–· M1 (native Apple Silicon ARM CPU) support
SPAN Plus by Voxengo
Download Link - https://www.voxengo.com/product/spanplus/
System Requirement
â–· Windows (32- and 64-bit Windows XP, Vista, 7, 8, 10 and later version
â–· macOS (10.11 and later version,Apple Silicon native, Big Sur, Monterey, and Ventura are supported
FreqAnalyst by Blue Cat Audio
Download Link - https://www.bluecataudio.com/Products/Product_FreqAnalyst/
System Requirement
MacOS
â–· An Intel or Apple Silicon processor.
â–· Mac OS 10.9 or newer.
â–· Any VST / Audio Unit / AAX compatible application (64-bit) .
Windows
â–· An SSE2-enabled processor (Pentium 4 or newer).
â–· Microsoft Windows Vista, Windows 7, 8 or 10.
â–· Any VST / AAX compatible host software (32 or 64 bit).

MultiInspector by Vertex Audio
Download Link - https://www.vertexdsp.com/products_multiinspectorfree.html
System Requirement
Windows:
â–· Windows XP/Vista/7/8.
â–· VST 2.4 compatible host software.
Mac OS X:
â–· Mac OS X 10.4/10.5/10.6/10.7/10.8.
â–· VST 2.4 or AU compatible host software. Universal Binary, PowerPC and Intel supported
LIMITERS
VladG Limiter N°6 By Tokyo Dawn Records
Download Link - https://www.tokyodawn.net/vladg-limiter-n6/
System Requirement
VST plugin format for Windows and Mac.
[the product no more actively supported. Compatibility with modern systems is not guaranteed.]
Loud Max V1.42 by Loudmax
Download Link - https://loudmax.blogspot.com
System Requirement
â–·Windows (VST 2.4 and VST 3 Plugin)
â–· Mac OS X, VST 2.4 and VST 3 Plugin ,Audio Unit Plugin for Mac OS X/ Intel Mac and ARM64 based Silicon.
Frontier by D16 Group
Download Link - https://d16.pl/frontier
System Requirement
â–· Windows 7 or newer [ VST2 / VST3 / AAX compatible host application (32bit or 64bit)]
â–· Mac OS X 10.9 to macOS 12 [Supports Apple Silicon]
Unlimited by Sonic Anomaly
Download Link - https://web.archive.org/web/20181203014924/http://sonic.supermaailma.net/plugins
System Requirement
EQUALIZERS
Overtone GEQ by Voxengo
Download Link - https://www.voxengo.com/product/overtonegeq/
System Requirement
â–· Windows (32- and 64-bit Windows XP, Vista, 7, 8, 10 and later version
â–· macOS (10.11 and later version. Apple Silicon native, Big Sur, Monterey, and Ventura are supported.
AudioUnit, AAX, or VST
Rare SE by Analog Obsession
Download Link - https://www.patreon.com/analogobsession/posts
System Requirement
â–· Windows & macOS VST, VST3, and AU plugin formats
TDR Nova by Tokyo Dawn
Download Link - https://www.tokyodawn.net/tdr-nova/
System Requirement
â–· Win XP SP2 or above, Mac OS X 10.9 or above.

SonEQ by Sonimus
Download Link - https://sonimus.com/products/soneq
System Requirement
â–· Mac OSX 10.6 or newer
â–· Windows XP or newer
â–· Audio Unit, VST 2.4, VST 3, AAX, RTAS. All platforms support both 32 and 64 bit operation.
VOS SlickEQ by Tokyo Dawn Records
Download Link - https://www.tokyodawn.net/tdr-vos-slickeq/
System Requirement
â–· Win XP SP2 or above, Mac OS X 10.9 or above.
COMPRESSORS
MCompressor by Melda Productions
Download Link - https://www.meldaproduction.com/MCompressor
System Requirement
â–· Windows 8 / 10 / 11 (64-bit) [ VST / VST3 / AAX compatible host (64-bit) ]
â–· macOS 10.14 Mojave to macOS 12 Monterey (64-bit) [ VST / VST3 / AU / AAX compatible host ]
â–· M1 (native Apple Silicon ARM CPU) support

SpecComp by Analog Obsession
Download Link - https://www.patreon.com/posts/specomp-51285294
System Requirement
â–· VST/VST3/AU | Mac 10.9 - 12.X
â–· VST/VST3 | Windows 7 - 8 - 10 - 11

Kotelnikov by Tokyo Dawn
Download Link - https://www.tokyodawn.net/tdr-kotelnikov/
System Requirement
â–· Win XP SP2 or above, Mac OS X 10.9 or above.
DCAM Free Comp by Fxpansion
Download Link - https://fxpansion.com/products/dcamfreecomp/
System Requirement
â–· 32-bit & 64-bit VST/AU/AAX plugin format for Windows & macOS

Leveling Tool by ADHD Tools
Download Link - https://audiotools.se/downloads/leveling-tool/
System Requirements
â–· Windows VST/VST3 64/32 bit host compatible, AAX 64 bit only
â–· Mac AU/VST/VST3 64/32 bit host compatible, AAX 64 bit only
SATURATION
Tube Amp by Voxengo
Download Link - https://www.voxengo.com/product/tubeamp/
System Requirements
â–· Windows 8 / 10 / 11 (64-bit) [ VST / VST3 / AAX compatible host (64-bit) ]
â–· macOS 10.14 Mojave to macOS 12 Monterey (64-bit) [ VST / VST3 / AU / AAX compatible host ]
â–· M1 (native Apple Silicon ARM CPU) support

Tube Driver by Nick Crow Lab
Download Link - http://nickcrowlab.blogspot.com/2009/08/tubedriver-v10.html
System Requirement
â–· Windows (VST 32 and 64bit) and Mac OS X (VST and AU 32 and 64bit).
IVGI by Klanghelm
Download Link - https://klanghelm.com/contents/products/IVGI.php
System Requirement
â–· 32-bit & 64-bit VST/AU plugin for Windows & macOS).
Tube Saturator Vintage by WaveArts
Download Link - https://wavearts.com/products/plugins/tube-saturator-vintage/
System Requirement
â–· Mac - AU, VST2, VST3, AAX â–· OS-X 10.11 to MacOS 13 (Ventura), Apple Silicon natively supported (AU, VST2, VST3, AAX)
â–· AAX - Pro Tools 11 and higher
â–· Windows 7/8/10/11
▷ AAX – Pro Tools 10.3.5 and higher
IMAGER

Ozone Imager by Izotope
Download Link - https://www.izotope.com/en/products/ozone-imager.html
System Requirement
▷ macOS Catalina (10.15.7) – macOS Monterey (12.6.x) * * Supported on Intel Macs & Apple silicon Macs (Apple M1 chips) in Rosetta and native.
▷ Windows: Windows 10 – Windows 11
â–· AU, AAX, VST2, VST3.
Wider by Polyverse
Download Link - https://polyversemusic.com/products/wider/
System Requirement
Supports VST2 / VST3 / AU / AAX plug-in formats
For Windows 64bit and OSX 10.9+ 64bit
MSED by Voxengo
Download Link - https://www.voxengo.com/product/msed/
System Requirement
â–· Windows (32- and 64-bit Windows XP, Vista, 7, 8, 10 and later version
â–· macOS (10.11 and later version. Apple Silicon native, Big Sur, Monterey, and Ventura are supported.
AudioUnit, AAX, or VST
MStereoExpander by Melda Productions
Download Link - https://www.meldaproduction.com/MStereoExpander
System Requirement
â–· Windows 8 / 10 / 11 (64-bit) [ VST / VST3 / AAX compatible host (64-bit) ]
â–· macOS 10.14 Mojave to macOS 12 Monterey (64-bit) [ VST / VST3 / AU / AAX compatible host ]
â–· M1 (native Apple Silicon ARM CPU) support
Stereotool V3 by Flux
Download Link - https://www.flux.audio/project/stereo-tool-v3/
System Requirement
▷ Windows 10 – 64bit and latest
â–· MacOS 10.12.6 Sierra and latest
▷ VST 2 – 64bitAudioUnit – 64bitAAX Native (64bit)
METERING

Loudness Meter by Youlean
Download Link - https://youlean.co/download-youlean-loudness-meter/
System Requirement
▷ Windows 7 or newer versions – 32 Bit, 64 Bit ▷ macOS 10.9 or newer versions – 64 Bit, Intel – Apple Silicon ▷ Available as APP, VST2, VST3, AU, AAX
dpMeter5 by TBProAudio
Download Link - https://www.tbproaudio.de/products/dpmeter
System Requirement
â–· Windows 32/64 bit (GPU) 32/64 bit VST, VST3 and AAX
â–· Mac 64 bit (Intel, Arm, GPU) 64 bit VST, VST3, AAX and AU
Multi-Band Correlation Meter by Voxengo
Download Link - https://www.voxengo.com/product/correlometer/
System Requirement
â–· Windows (32- and 64-bit Windows XP, Vista, 7, 8, 10 and later version
â–· macOS (10.11 and later version. Apple Silicon native, Big Sur, Monterey, and Ventura are supported.
AudioUnit, AAX, or VST
OTHERS
ISLO8 by TBProAudio
Download Link - https://www.tbproaudio.de/products/isol8
System Requirement
â–· Windows 32/64 bit (GPU) 32/64 bit VST, VST3 and AAX
â–· Mac 64 bit (Intel, Arm, GPU) 64 bit VST, VST3, AAX and AU