Karps Music — KARPS and cyan MUSIC stacked beside an original ink-drawn listening robot with rectangular LED sensors and headphones
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Free · In your browser · Nothing to install

Any track.
Any vibe.
In seconds.

Professional audio effects at your fingertips. Add reverb, 8D audio, echo, pitch shifting and more — right in your browser.

  • No credit card
  • 3 free credits / month
  • MP3, M4A & WAV export
SOUND / INK / MOTION

01 / Listen before you create

Hear it. Right now.

Hit play and switch presets — every clip here was rendered by the same engine that processes your tracks. Real IR reverb, real time-stretching, real loudness normalization.

Interactive demo · Studio Default

Karps Demo · Original

Click a preset. Hear the difference.
DEMO PRESETS

KEEP EXPLORING

A taste of the library. These effects are available in the full studio.

Explore all 34 effects
Paused / Ready to listen
0:000:00

Real Karps Music renders. Use headphones for 8D audio.

02 / Effect library

Every effect you need

Every change re-renders from your original lossless master. Add, remove, combine — zero quality loss, and you can undo anything.

34 effectsSelect an effect to read more.

Speed04

Slowed

Free

Slow down your track for a dreamy, lo-fi feel.

Ultra Slowed

Premium

Extreme slow-down for deep, atmospheric textures.

Sped Up

Premium

Speed up your track for high-energy edits and remixes.

Ultra Sped Up

Premium

Maximum speed boost for hyperpop and nightcore edits.

Space02

Echo

Free

Add depth and space with customizable echo delay.

Reverb

Premium

12 spaces recorded in real places, from a small booth to a huge dome.

Pitch04

Lower

Free

Shift the pitch down for a deeper, darker tone.

Ultra Lower

Premium

Extreme pitch-down for sub-bass and dark atmospheres.

Higher

Premium

Shift the pitch up for bright, airy sounds.

Ultra Higher

Premium

Maximum pitch-up for hyperpop and chipmunk effects.

Modulation & Movement03

8D

Free

Pan audio in a 360° soundscape for an immersive experience.

Chorus

Premium

Lush modulated doubling for vocals and synthesizers.

Tremolo

Premium

Rhythmic pulsing amplitude and analog volume modulation.

Tone / Character03

Bass Boost

Premium

Heavy low-end boost for massive punchy bass.

Lo-fi

Premium

Warm vintage filter emulating analog tape and vinyl.

Radio

Premium

Bandpass filter mimicking vintage radio broadcast.

Phonk & Funk02

Phonk

Premium

Saturated 808, lower pitch and tempo, and the mix breathing with the bass. Three variations: Dark, Drift and Tape.

Funk

Premium

Blown-out bass up front and open highs, in the style of Brazilian funk. Three variations: Heavy, Overdrive and Light.

Drive / Digital02

Robot

Premium

Transform any voice into a robotic, electronic sound.

Bitcrusher

Premium

Lo-fi 8-bit digital crunch and rhythmic distortion.

Ambient04

Rain

Premium

Layer soothing rain sounds beneath your track.

Thunder

Premium

Add dramatic thunder rumble to your audio.

Forest

Premium

Surround your track with peaceful forest ambience.

Ocean

Premium

Layer calming ocean waves beneath your music.

Scenes04

Another Room

Premium

The song playing at the party on the other side of the wall: only the bass gets through, with the room around it.

Headphones

Premium

The song leaking from someone else's headphones: just the thin highs, no bass.

Car

Premium

Inside a car with a subwoofer: swollen bass, a closed-in cabin and an almost mono image.

Bathroom

Premium

In the bathroom at the party: the song muffled through the door, with the tiles' echo.

Pro — Fade02

Fade In

Pro

Smooth adaptive volume rise at the start of your track.

Fade Out

Pro

Smooth adaptive volume decay at the end of your track.

Pro — Transform02

Reverse

Pro

Play audio in reverse for seamless transitions and reverse vocal chops.

Stutter

Pro

Rhythmic digital glitch repeat and quick dynamic cuts.

Pro — Sweep02

Low-pass Sweep

Pro

Dynamic low-pass sweep with gradual top-end cut for build-ups.

High-pass Sweep

Pro

Dynamic high-pass sweep filtering the bass for tension before drops.

Karps StudioIllustrative preview
Studio DefaultKarps demo

1 track · 0:11

Effects
Speed
SlowedFreeSped UpPremium
Space
EchoFreeReverbPremium
Movement
8DFreeChorusPremium
Active SlowedApply selected
Export

This diagram illustrates the workflow; use Karps Music to process a track.

03 / Studio

A studio that lives in your browser

Upload your track, apply effects in real time and export — no software to install, no account needed to explore.

  • Interactive waveform editor
  • Stack multiple effects at once
  • Instant preview before export
  • Download as MP3, M4A or WAV
Open the Studio ↗

Behind the sound

Built like a studio. Feels like a toy.

Everything a producer expects, with none of the setup.

01

Effects never stack up

Every change re-renders from your original lossless master. Add, remove, combine — zero quality loss, and you can undo anything.

02

Your browser is the studio

No downloads, no plugins, no updates. Any computer, any OS.

03

30+ effects, 12 reverb spaces

12 real spaces, from Booth to Dome — plus speed, pitch, echo, robot, 8D, chorus, tremolo, bass boost, lo-fi, phonk, funk, scenes like Another Room and Car, reverse, stutter and sweeps.

04

Export the way you need

MP3 for sharing, lossless WAV for production.

05

Private by design

Your files live in private storage, are never public, and are gone the moment you delete them.

06

Go multi-track with Pro

Up to 5 tracks per project. Split, trim and arrange waves on a timeline, then export the full mix.

04 / New · Karps Radar

Track trending hits and remix before anyone else

Market trend intelligence built right into your studio. Track official releases from your favorite artists and Top Charts across 20+ countries in real time — then take any of them into the Studio with your own audio.

Explore Karps Radar ↗
Karps RadarIllustrative preview
Discover / Follow / CreateFind your next idea.
Top Charts / TrendingGlobal
#Track & ArtistAction
  1. 01Track titleArtist nameRemix
  2. 02Track titleArtist nameRemix
  3. 03Track titleArtist nameRemix
Monitored Artists
7 days30 days90 days
Artist nameTrack titleNew
Artist nameTrack titleNew
From Radar to StudioRemix in Studio

A product workflow preview, not a live market feed.

Made for

Whatever you're making.

  • TikTok & Reels edits
  • Slowed + Reverb
  • Nightcore & Sped Up
  • Lo-fi & study beats
  • Robot & vocal FX
  • Ambient & ASMR

05 / From file to finished sound

How it works

Three simple steps to transform your audio.

  1. 01

    Create a project

    Sign up for free, create a project and upload any audio file to get started.

  2. 02

    Apply effects

    Browse our effects library and apply as many as you want — instantly processed.

  3. 03

    Download & share

    Export your processed track and share it with the world.

06 / FAQ

Questions, answered.

Do I need to install anything?

No. Karps runs entirely in your browser. Upload, edit, preview and export — nothing to download.

What is a credit?

One credit renders one track when you create a project. Free gets 3 a month, Premium 50, Pro 100 — and you can buy extra packs that never expire.

Which audio formats are supported?

Every plan uploads MP3, M4A, WAV or FLAC: up to 5 min on Free and up to 8 min on Premium and Pro. Downloads are MP3 or M4A on any plan, plus WAV on Premium and Pro.

Can I switch plans?

Yes. You can upgrade or switch plans at any time. Your data is always preserved.

What happens to my projects if I downgrade?

Your projects remain accessible but you'll be limited to 3. No data is deleted.

Is there a free trial for Premium?

Our Free plan gives you access to the core features permanently. No trial needed to start.

Ready when you are

Your studio is one click away.

Upload a track, add effects, and export — all in your browser. Free to start, nothing to install.

Guides

All guides