Free three-band upward/downward multiband compressor originally from Ableton's Multiband Dynamics preset.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
Checked September 2026 · 4 picks
Best Free Mastering Tools (2026)
The best free mastering tools are OTT, BandLab Mastering and TDR Kotelnikov. OTT is best for aggressive multiband upward/downward compression. BandLab Mastering is best for bandlab users who want free instant AI mastering with genre-style presets. TDR Kotelnikov is best for transparent mastering-bus compression.
- FREE
#2BandLab Technologies
BandLab Mastering
Free AI-powered instant mastering built into the BandLab music-making platform.
VST3not supportedAUnot supportedAAXnot supportedCLAPnot supportedWINnot supportedMACnot supportedLNXnot supported+ Web · iOS · Android Free wideband mastering compressor combining high fidelity control with musical flexibility.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supportedFree mixing/mastering EQ with four vintage-modeled EQ character options.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
Questions people ask
OTT by Xfer Records. It is best for aggressive multiband upward/downward compression and is free to use.