The 11 Best Free Flanger VST/AU Plugins Available in 2020!

Last Updated on April 20, 2020 by Facundo

Finding great sounding effects is already pretty hard, but finding free ones that also sound great is even harder.

I put together a list of the best free Flanger VST/AU plugins which I think sound awesome.

I will also include three premium ones at the end, should you be looking for something a bit better.

Let’s get started!

Best Free Flanger Plugins

  1. Blue Cat’s Flanger – (Windows/Mac)
  2. Classic Flanger – (Windows)
  3. MFlanger – (Windows/Mac)
  4. TAL-Flanger – (Windows/Mac)
  5. FlangerHand – (Windows)
  6. Transilient – (Windows)
  7. FlangerBox – (Windows)
  8. Retrodelay – (Windows)
  9. DLYM Delay Modulator – (Windows/Mac)
  10. Dead Duck Flanger – (Windows)
  11. HY-MBMFX2 Free – (Windows/Mac)

Best Premium Flanger Plugins

  1. EFEKTOR FL3606 Flanger – (Windows, Mac)
  2. Antresol – (Windows, Mac)
  3. Instant Flanger MK II – (Windows,Mac)

Blue Cat’s Flanger – (Windows/Mac)

Very famous during the 70’s and 80’s, the Flanger effect can be used on almost any audio track: on drums, voices synths or guitars, from a subtle effect to a deep alien-like voice effect.

This plugin has a fairly simple user interface and is pretty easy to use, but it’s very versatile and sounds great!

The stereo version allows you to transform it into a stereo flanging effect with just one knob.

It works on Windows and Mac and is also available in a lot of formats!


  • Vintage flanger effect.
  • Stereo spread control.
  • Sine or triangle LFO shapes.
  • In or out of phase feedforward and feedback paths.

You can download it here.

Related: List of the Best Delay VST/AU plugins.

Classic Flanger – (Windows)

This is a great flanging plugin which allows you to boost the flanging effect to maximum without getting unwanted effects.

This plugin is part of the Audio Classic Series by Kjaerhus which includes almost ten free plugins.

I would definitely recommend that you try this one out, and all the other plugins in the bundle as well…

The whole bundle is only 3.2mb and all of the plugins go extremely easy on your CPU, which is always good.


  • Smooth Flanger effects Stereo spread
  • Ultra low CPU usage
  • Supports sampling rates up to 96kHz
  • Full VST automation

You can download it here.

Related: Best 225 free VST Plugins in the World!

MFlanger – (Windows/Mac)

MFlanger is a versatile flanger a variable oscillator shape for greater flexibility, and integrated tube saturation.

This adds up to a responsive plugin with an analog sound.

It sounds damn impressive, so check it out.


  • Unique visualization engine with classic meters and time graphs
  • M/S, single channel, up to 8 channels surround processing…
  • Adjustable oscillator shape technology

You can download it here.

Related: Best free DAWs currently available!

TAL-Flanger – (Windows/Mac)

TAL-Flanger is a very simple and easy to use flanger plugin which has a pretty unique sound to it and some asymmetric analog like components in the feedback corner.

Useful for a wide range of flanger effects from subtle to extreme.

It works both on Windows and Mac, 32-bit and 64-bit.

You can download it here.

Related: Orchestral VST/AU Plugins currently available!

FlangerHand – (Windows)

FlangerHand is based on the early flanging effects of the ‘60s.

It is an incredibly light-weight plugins that’s also easy to use.

However, it’s Windows only, so keep that in mind!

You can download it here.

Transilient – (Windows)

Transilient is a FSU/Glitch type multi-effect unit created by Liquidclear and designed to make strange and unusual new sounds, however it’s still pretty easy to use and control.

The 5 different effects can be modulated by one of two 16-step sequencers, a LFO, any WAV file, and/or manually controlled.

Additionally, the modulators can be synced to your host’s tempo. You can easiliy turn a single sustained note or chord into an electronic drum loop.

Or take an existing drum loop and turn it into something glitch-like and noisy.

Slower tempos work great for drone and ambient sounds.

16 presets are included to get you started.

You can download it here.

You might also be looking for the best Guitar VST/AU Plugins Available. Check out this post I wrote!

FlangerBox – (Windows)

FlangerBox can do the typical flanger sounds, which are easy to achieve and sound pretty good.

However, it can also produce cool chorus and comb filter sounds too.

A selection of five different waveforms are available in this unit; the first two “Sine” and “triangular” will work for the typical Flanger/Chorus modulation sound.

The other three “Saw”, “Square” and “Random” are more suitable for rhythmically oriented modulations.

Furthermore, a Phase adjust function is included to provide, if required, a more expansive sound.

Also included is a Wave invert function to add some more flexibility to your modulations.

The FlangerBox is fully automatable and has the ability to store 64 presets.

It even comes with a few already pre-programmed ones that will show you what this plugin is all about.

Note: It’s 32-bit only.

You can download it here.

Related: Best Synth VST/AU plugins available!

Retrodelay – (Windows)

Retro Delay is a flexible all-round delay effect in VST format.

It has the character and sound of a vintage delay unit but features many modern options.

Besides delays, it can produce a wide range of modulation, chorus, flanger and phaser effects.

RetroDelay is for Windows only.


  • Independent left and right channel delay lines
  • BPM synced or manual times (up to 6 seconds)
  • Forwards or backwards delays
  • X-feedback
  • Ping-pong delays
  • ‘1 feedback pass’, there will always be 1 feedback
  • And More

You can download it here.

DLYM Delay Modulator – (Windows/Mac)

DLYM is a free ‘Delay Modulator’ plugin which produces flanger and chorus style effects.

Taking inspiration from DRC’s chorus effect, DLYM expands on the functionality, and makes it available for DAW applications on PC, Mac and iOS for free!

Whether you’re looking to add just a touch of depth to your sounds or radically change them, DLYM can do both.

The interface is extremely clean and uncluttered… just the way I like it!


  • 2 processing modes – ‘Analog emulation’ and ‘Dimension style’.
  • 6 time syncable modulation waveforms – Sine, Square, Saw, Triangle, Sample & Hold and Filtered Sample & Hold.
  • Adjustable stereo spread.
  • Crossover/cutoff to control frequency range of the effect.
  • Built-in preset/patch manager.
  • Available in a variety of plugin formats: VST, AU, AUv3.

You can download it here.

Dead Duck Flanger – (Windows)

The Dead Duck Flanger is an extremely simple and easy to use, yet great-sounding flanger VST.

Dead Duck Software also have a lot of other effect bundles, synths, and other stuff which you can download for free here.

If you are looking specifically for the flanger, then I’d recommend that you download it from the VST4Free website.

And lastly…

HY-MBMFX2 Free – (Windows/Mac)

Just one look at this VST’s interface and you know that it’s a pretty complex plugin to use.

However, what it lacks in ease of use it more than makes up in quality and versatility.

MBMFX2 splits your sound into three bands and lets you manipulate each one differently by inserting the 22 built-in effects, one of which is a flanger.

Note: There’s a premium version which sells for $48, and a free version.

With the free version you will only have access to one effect per frequency band, but it’s more than enough for most people.

Plus, if you ever feel the need to upgrade, you can simply do so.

You can download it here.

To get the free version simply scroll down, click on download and select the free version.

3 Premium Flanger plugins which are worth the money!

Here I will list just three affordable Flanger VSTs which I found to be pretty good.

EFEKTOR FL3606 Flanger – (Windows, Mac)

This is a super simple and easy to use flanger which only provides you with a handful of controls… Ideal for beginners.

Find out more about EFEKTOR here.

Antresol – (Windows, Mac)

This is a definite step up in complexity when compared to the previous one on the list, however this means this you will have more control over everything that’s happening.

If you know your way around pretty complex plugins, then take Antresol into consideration.


  • True emulation of BBD based analogue delay line
  • Optional independent parameter control for each stereo channel
  • Selectable L/R or M/S stereo processing modes
  • Mistress mode allows the whole unit to work the same as the classic flanger
  • LFO can be synchronized with your host application

Find out more about Antresol here.

And lastly…

Instant Flanger MK II – (Windows,Mac)

If you’re looking for that great vintage-style flanger sound, then Instant Flanger might be for you.

It is an authentic emulation of the original 1975 studio rackmount and it was famously used on David Bowie’s “Ashes to Ashes” and Cyndi Lauper’s “Time After Time.


  • Depth controls the intensity of the effect. 100% adds the delayed signal to the dry signal. -100 % subtracts the dry signal from the delayed signal
  • Three distinct flavours of flanging. Set the Mode switch for Shallow, Deep or Wide
  • Manual control allows you to control the ‘comb’ effect by turning the Big Knob
  • Oscillator drives the flanging at a user-defined rate.

Find out more about Instant Flanger MK II here.


Most of the plugins on this list should be more than enough for any situation, especially if you’re a beginner.

If you feel like you need something more professional, then simply check out the premium flangers I listed.

Have a nice day!

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