Free online tool

Slow Down Music Online

Slow down music online to learn a part, catch fast lyrics or build a calmer study mix. Set the speed, keep or drop the pitch, add light reverb, export MP3 free.

Open the free editor: upload MP3, WAV, AAC, OGG or FLAC, adjust speed, reverb, bass, tone, width and space, then export MP3 or a ZIP of many tracks. Everything runs in your browser.

Not everyone who slows down music is making a slowed + reverb edit for TikTok. A lot of people want to slow a song so they can hear it better: a guitarist chasing a fast run, a language learner trying to catch lyrics, a student who finds a familiar playlist less distracting at a slower, softer tempo. The editor above handles all of that in the browser, for free, with nothing uploaded. This page is for listeners and learners rather than creators.

If you are making content and want the full style, the slowed reverb maker is the right page. If you want to slow music you are streaming on YouTube rather than a file you own, the YouTube extension does that live. And if you want the detail on how the tool keeps the key steady while changing tempo, read Preserve pitch.

Start with the pitch question

When music is slowed the natural way, by playing it at a lower rate, its pitch drops. At 0.84x everything is about 3 semitones lower. For a listener that can be pleasant. For a learner it is usually a problem, because the notes you hear no longer match the notes on your instrument.

The editor has a Preserve pitch switch. On, the tempo changes and the key stays put. Off, both change together. Most of the uses on this page want it on. Preserve pitch changes the live preview only; exported files keep the speed-linked pitch, so for an in-key file to keep, find your speed here and then render it with Audacity's Change Tempo or a DAW time-stretch. The study and sleep uses are the exception, where the lower pitch is part of the appeal.

Learning an instrument part

Fast passages are hard to hear, not just hard to play. Slowing them down separates the notes so you can tell what is actually being played.

1. Add the recording. Any MP3, WAV, AAC, OGG or FLAC file works.
2. Turn on Preserve pitch so the notes match your instrument.
3. Set Speed to 0.70x. If you still cannot pick the notes apart, go to 0.60x. If it is comfortable, come up to 0.80x and work toward full tempo gradually.
4. Leave Reverb at 0%. You want to hear the attack of each note, and reverb hides it.
5. Use Bass and Tone to isolate your part. For bass guitar, raise Bass and cut Tone. For a lead line or vocal melody, cut Bass and raise Tone a little so the low end stops masking it.
6. Download the slowed MP3 and loop it in any player.

The slider stops at 0.50x, half speed. Half speed with Preserve pitch on will sound a little watery, but it is often good enough for working out which notes are in a fast run before you bring the tempo back up.

Hearing lyrics clearly

Rap verses, fast folk, dense pop choruses and any song in a language you are learning become far easier to follow at 0.75x to 0.85x. Preserve pitch keeps the singer's voice natural rather than turning it into a growl, which matters when you are trying to learn how words are actually pronounced.

A small Tone boost of +2 to +3 dB sharpens consonants. Keep Reverb at zero. If a backing track is drowning the vocal, pull Bass down to -3 or -4 dB.

Study, focus and sleep playlists

This is the one case on this page where turning Preserve pitch off is the better choice. A familiar playlist at 0.85x with the pitch dropped feels calmer and less demanding of your attention, which is why slowed versions have become common background audio for studying and winding down. A little reverb helps here too, because it softens edges and fills gaps.

Keep the effect gentle. Heavy reverb and a very slow speed turn music into a wash that some people find pleasant and others find distracting. Start at 0.85x, 25% Reverb and 3.0 s Space and adjust.

Dance, choreography and fitness

Rehearsing a routine at a slower count is easier when the music still sounds like the music. Preserve pitch on, Speed at 0.75x to 0.90x, no reverb. Because the tool exports a file, you can save the same song at 0.75x, 0.85x and 1.00x and step through them during a session, with the caveat that exported files keep the speed-linked pitch; for in-key rehearsal files, render them in Audacity at the speeds you settled on. Add the file three times to the track list, give each copy its own speed by selecting them one at a time, and Download All gives you a ZIP.

Settings by purpose

Space is listed at the default for the dry rows because it has no effect when Reverb is 0%.

Doing this on a phone

The editor works in Android Chrome and iOS Safari. Processing takes longer than on a laptop, and very long files use more memory, but a four-minute song is fine. A practical routine for musicians: slow the tracks you are working on at your desk, download the ZIP, and keep the slowed files on your phone for practice sessions away from the computer. The iPhone page covers Safari specifics.

What to expect from the sound

Slowing with Preserve pitch on is a time-stretch. Between 0.75x and 0.95x it is nearly transparent. Below 0.70x you will hear some softening of drum hits and a faint watery texture on long notes. That is normal for every time-stretch algorithm, not a fault in your file, and for practice purposes it rarely matters.

Slowing with Preserve pitch off is a resample, which is clean on its own but stretches any compression artifacts in the source. If a song sounds grainy after slowing, the fix is a better source file, not a different setting.

Exports are MP3 at 96 kbps and 32 kHz, which is more than enough for practice, listening and study playlists. There is no WAV export.