Best Free Filter Plugins For PC & Mac (2018)!

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Inear Display Regressif

Regressif is an audio plugin focused on sound degradation. Combining a multimode filter with distortion, samplerate reduction and bitcrushing effects, it can turn the most innocent sound into a wall of digital noise. Two LFO modules and an additional LFO mixer can then be brought into the mix to further mutilate your audio.

With its clever design, it’s possible to use Regressif as distortion but also as classic filter plugin. 

Inear Display Regressif Free Filter Plugin


  • Analog Style Filter.
  • 4 Filter Types: Lowpass, Highpass, Bandpass, Notch.
  • Digital Distortion (pre or post Filter).
  • Samplerate Reduction.
  • Bit Crusher.
  • 3 Routing Options for the LoFi Module Effects: Chain, Parallel, Ringmod.
  • Processed signal Amplitude control.
  • Dry/Wet Control.
  • 2 LFO Modules.
  • 7 Classic Shapes for the LFO Modules.
  • Optional Host Clock Sync for the LFO Modules.
  • LFO Mixer to combine the 2 LFO Modules.
  • Intuitive Modulation Routing Paradigm using Patch Chords.
  • Randomizer.
  • 40 factory presets.
  • Resizable User Interface.
  • Define a custom startup patch.
  • Cross-Platform presets.

Available here: Regressif

Stagecraft Software SC-Autofilter

SC Autofilter gives you all the essential functionality you’d expect from an autofilter, along with features designed specifically with the DJ/electronic musician in mind. Parameters are fully automatable, quantizable, and a display showing filter response and output FFT allows you to see the filter’s effect in real-time.

Stagecraft Software Autofilter Free Filter Plugin


  • Variable lowpass filter.
  • LFO control for frequency and resonance of filter.
  • LFO % (range of frequency swept by an LFO).
  • Duty cycle warping.
  • Wet/dry mix.
  • Full parameter automation.
  • Preset sharing.

Available here: SC-AutoFilter

Musical Entropy Guitar Gadgets

Guitar Gadgets is a compilation of “false” analog guitar pedal simulations, made to be used mainly with electric guitars and guitar amp simulations, but which may be sound interesting in any situation. The focus here wasn’t to design classic effects, but weird, strange, ugly or “different” ones instead. 

Guitar Gadgets Free Filter Plugin

The effects included are the following:

  • Filtrator: a filter pedal effect like, based on the EMS VCS3 analog filter.
  • Combulator: a modulated comb filter effect.
  • and many more!

Available here: Guitar Gadgets

Tekit-Audio 8kut-2

8kut, an 8-band frequency cutter, is a stripped down version of Tek’it Audio’s Kutter plug-in, designed with DJs and live performance in mind, allowing you to cut frequencies on eight bands easily.


  • 8-band frequency cutter.
  • Independent left and right channel pass through.
  • Phase inverter, Effect Bypass, Gain boost and Dry/Wet Mix.
  • ZDF Filter design.
  • 64-bit internal processing.
  • Full MIDI automation support.
  • Works in mono or stereo.
  • Undo your changes to initial preset value.
  • Integrated Preset manager, rename, copy, save, load…
  • Randomize all parameters.
  • 40 Factory presets.
  • Up to 64 user presets per bank.

Available here: 8kut 

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