Krakli
X-Citer
X-Citer is a spectral effect by Krakli that splits audio into four tunable frequency bands to modulate an FM oscillator, ideal for real-time manipulation of harmonically rich signals.
VST2Spectral
Instruments, effects, and hidden gems
Free plugins: Spectral
Browse 21 reviewed free spectral plugins for Windows, with compatibility, formats, interface previews, and installation details.
2140reviewed plugins
79%install-ready
Top 5category ranks
40sound categories
All categoriesDelay · 84Reverb · 76Dynamics · 106Mastering · 88Gates & de-essers · 24Pitch · 31Eq · 80Spectral · 21Filters · 69Distortion & overdrive · 70Lofi · 36Tube & tape · 19Preamps & amps · 29Modulation · 73Spatial · 51Multi-effects · 24
Filtered catalog
21 plugins
Every reviewed plugin matching the current filters.
Wavegrove
Vastaus
Vastaus by Wavegrove is a spectral harmonic enhancer designed for use on instrument tracks, buses, and master channels to enrich and sculpt your audio.
VST2Spectral
Variety Of Sound
ThrillseekerXTC
ThrillseekerXTC by Variety Of Sound is a parallel analog-style exciter that adds weight and character to digital audio using a true analog equalizer design.
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ViatorDSP
Stimulate
Stimulate by ViatorDSP is a free harmonic exciter plugin that brightens your audio by adding odd, even, or both harmonic types. Control the harmonic distortion amount and target frequencies to enhance your signal.
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Andrew Reeman
Spectral Suite
Spectral Suite by Andrew Reeman is a free collection of FFT-based VST2 plugins for Windows x64 offering unique spectral processing including a spectral gate and sinusoidal shaped filter.
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Jeroen Breebaart
Smash Pro
Smash Pro is a spectral processor plugin offering detailed frequency-based control over compression, harmonic excitation, and equalization to create a warm and fat sound.
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Robin Schmidt
Signal Analyzer
Signal Analyzer by Robin Schmidt is a free VST2 plugin offering combined oscilloscope and spectrum analyzer functionality for real-time waveform inspection on Windows.
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Jeroen Breebaart
SEND
SEND is a free spectrum enhancing plugin featuring resonating low and high-pass filters combined with non-linear elements to generate even or odd harmonics.
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Analog Obsession
ReLife
ReLife by Analog Obsession is a dynamic enhancer designed to revive lifeless tracks with simple controls and instant results. Adjust input gain and shape with predefined EQ for softer or harder effects.
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lkjb Plugins
ReFine
ReFine by lkjb Plugins subtly enhances mixes by extracting psycho-acoustic parameters to add warmth, space, and punch in a level-dependent way without heavy distortion.
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Analog Obsession
Lovend
Lovend by Analog Obsession is a free harmonic bass enhancer plugin that provides selectable frequencies and continuous boost to strengthen weak low-end material.
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Krakli
Isol8tor
Isol8tor by Krakli is a free VST2 plugin for Windows that removes or isolates vocals and offers unique filter and timebase effects based on phase cancellation.
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ToneBytes
GLS
GLS by ToneBytes is a free vocal remover plugin using central channel subtraction to isolate and remove singer's voice while preserving bass and drums.
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Full Bucket Music
Frequency Shifter
Frequency Shifter by Full Bucket Music is a free VST2 effect plugin that shifts the spectrum of input signals up or down by up to ±5000 Hz, offering unique spectral transformations.
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Digital Suburban
Exitixe
Exitixe by Digital Suburban is a spectral enhancer plugin inspired by the BBE Sonic Maximizer process. It phases high harmonics with lows including harmonic distortion for a unique sound shaping experience.
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Digitalfishphones
Dominion
Dominion by Digitalfishphones is a free VST2 plugin for Windows that offers precise control over a signal's attack and sustain phases, allowing detailed envelope shaping.
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Mastrcode Music
Substrate
Substrate by Mastrcode Music is a bass enhancer VST2 effect that adds sub-harmonic frequencies to enrich your bass sounds on Windows.
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Noisebud
Noisebud Binvert
Noisebud Binvert is a free spectral effect plugin for Windows that splits audio into two adjustable frequency bands and allows independent phase inversion for each band, helping to preserve heavy bass.
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The free-plugin pulseUpdated Sep 11, 2026
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