Musicians Learning Songs
Slow solos and grooves down to learn them note by note, then speed back up; turn them into tabs with the guitar tab generator.
BPM Changer: Speed Up or Slow Down Any Song
Drop in a track and this free BPM changer sets a new tempo by percentage or by exact target BPM while the key stays where it is. The original BPM is detected for you, the new tempo updates as you move the control, and you hear it live before you download WAV or MP3. Everything runs in your browser.
Free, No Sign-inBPM Detected for YouKey Stays the SameDownload WAV or MP3
Upload a song to change its tempo and BPM
Supported formats: MP3, WAV, M4A, FLAC, OGG, AAC, MP4, up to 200 MB and 15 minutes
or drag and drop a file here
- Runs in your browser, nothing is uploaded
- Free, no sign-in
- Download WAV or MP3
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Why Use a BPM Changer to Practice, Mix and Train
Learning a fast solo, mixing two tracks a few BPM apart and running a class at exactly 128 BPM all come down to one job: changing the tempo without wrecking the sound. Media players drag the pitch along with the speed, and a DAW is a lot of setup for one edit. A BPM changer does it in your browser in seconds, with the key left where it was.
- A fast solo is a blur at full speed, and slowing it in a media player drags the pitch down with it.
- Two tracks a few BPM apart drift out of sync halfway through the mix.
- Dance and fitness classes need songs at a set tempo, not whatever the artist recorded.
- Speeding a track up for an edit gives every voice the chipmunk effect.
- Working out the exact percentage to get from 124 to 128 BPM is maths a BPM changer should do for you.
What This Tempo Changer Does
A tempo changer with speed control that keeps the music sounding like itself.
Change Tempo, Keep Key
Change tempo anywhere from 50% to 200% and the key stays exactly where it was, so voices and instruments sound natural.
Exact Target BPM
Type the BPM you need, such as 128, and the speed is worked out for you from the detected tempo.
BPM Detected for You
The original BPM and key are found on your device as soon as the song loads.
Live Preview, Loop and A/B
Hear the new tempo instantly, loop a tricky section and flip between the original and the new version.
Slowed, Sped Up and Nightcore
One-click presets for Slowed + Reverb, Daycore, Sped Up and Nightcore, with adjustable reverb.
WAV or MP3 Download
Export lossless WAV or MP3 in three sizes, with the new tempo in the file name and no watermark.
How to Change BPM in Three Steps
From the original tempo to a new one in under a minute.
- 1
Add your track
Drop an MP3, WAV, M4A, FLAC, OGG, AAC or MP4 file of up to 15 minutes into the box above, or try the demo. The original BPM and key appear in a few seconds.
- 2
Set the new tempo
Drag the speed control for a quick tempo adjust, use the 1% steps, or type a target BPM to change BPM exactly. The new BPM and length update live, and the key stays the same unless you switch to vinyl mode.
- 3
Compare and download
Loop the section you care about, flip between the original and the new tempo, then download WAV or MP3.
Features of the EzTranscriber BPM Changer
For practice rooms, DJ booths, dance studios and editing desks.
Slow Down a Song to Learn It
Slow down a song to 50% or 75% and every note of a fast solo, a drum fill or a vocal run becomes clear, at the original pitch so you can play along in tune. Drag across the waveform to loop the hard bar, then raise the tempo a few percent each time you nail it. It is the quickest way to slow down music for practice, a song tempo changer that works like a patient teacher, and it helps just as much when you need to slow down audio to write out lyrics or a lecture by ear.
Slow Down a SongChange BPM to an Exact Target
DJs and producers rarely think in percentages. Type the tempo you want and the BPM changer works out the speed: a 124 BPM track set to 128 runs at 103.2%, and the length updates to match. Use it as a song BPM changer for mashups, an MP3 BPM changer for a fitness playlist or an audio BPM changer for a sample that has to sit in your session, then change BPM online for the next track. It doubles as a music tempo adjuster for live sets, with nothing to install.
Set a Target BPMSpeed Up Audio Without the Chipmunk Effect
Turning up the playback rate in a media player raises the pitch along with the speed, which is why sped up voices sound like cartoons. This tempo changer stretches the audio in time instead, so you can speed up audio, speed up a song for a workout mix or speed up music for a quick edit while the key stays put. Want the vinyl sound on purpose? Switch off Keep original pitch and the pitch rises and falls with the speed, just like a record. Either way you change audio speed in your browser, and the same tool works as an audio speed changer, a music speed changer, a song speed changer and an MP3 speed changer.
Speed Up a SongSlowed + Reverb, Nightcore and Sped Up Presets
One click sets up the sounds you hear all over short video apps. Slowed + Reverb plays the song at 0.8x with a big, washy reverb; Daycore is a gentler 0.85x with light reverb; Sped Up runs at 1.15x and Nightcore at 1.25x, with the pitch moving along with the speed. Every preset is only a starting point: adjust the speed, the reverb mix and the room size, from a small room to a large hall, then download. It is a quick nightcore maker and slowed and reverb maker built into the same BPM changer.
Try a PresetBPM Changer Calculator: Old Tempo to New
Type the original and the target BPM to see the speed, the new length and what vinyl mode would do to the pitch. Hear both tempos on the metronome.
BPM calculator
Speed, length and pitch for any tempo change
Speed
80.0%
New length
4:23
Key, pitch kept
Unchanged
In vinyl mode the pitch would move
-3.9 semitones
Not sure of the original tempo? Drop the song into the BPM changer above and it is detected for you.
Speed is simply the target BPM divided by the original: 120 to 96 BPM is 80%, and a 3:30 song becomes about 4:23 long. With Keep original pitch on, the key stays put; in vinyl mode, 80% speed also lowers the pitch by about 3.9 semitones.
Tempo Changer Settings for Common Jobs
Good starting points for the tempo changer, for the most common reasons to change tempo.
| Tempo Changer Settings for Common Jobs | Speed | Example | Tip |
|---|---|---|---|
| Learning a fast solo | 50% to 75% | A 160 BPM riff at 75% plays at 120 | Raise the speed a little each time you nail it |
| Transcribing by ear | 50% to 70% | Words and notes stand apart at slow speed | Loop one phrase at a time |
| DJ beatmatching | 94% to 106% | 124 BPM to 128 BPM is 103.2% | A small BPM change keeps the track sounding natural |
| Dance and fitness classes | 90% to 110% | A 120 BPM song at 105% gives 126 BPM | Type the exact BPM the routine needs |
| Slowed + Reverb | 80% | Pitch drops with the speed, big reverb | Start from the preset, then adjust the reverb mix |
| Nightcore | 125% | Pitch rises with the speed | Keep the reverb light or off |
| Sped up edits | 115% | A short clip for a video | Turn Keep original pitch on if the vocal must sound natural |
Who Uses a BPM Changer
Anyone who needs to change BPM for practice, a mix, a class or an edit.
DJs
Match two tracks to the same tempo before the set, and check any tempo with the BPM and key finder.
Dance and Fitness Instructors
Change music tempo to the exact BPM each routine needs, without the chipmunk effect.
Producers and Remixers
Change song tempo to fit a sample or an a cappella to your session, and shift its key with the pitch changer if it clashes.
Transcribers and Learners
Slow speech down to catch every word, or let our audio to text converter write it out for you.
Content Creators
Make sped up and slowed versions of a sound for short videos in a few clicks.
What Musicians and DJs Say About Our BPM Changer
I learn jazz solos by slowing them to 70% and looping one bar at a time. The pitch stays put, so I can play along on my sax in tune.
Thomas Reed
Saxophonist
Typing 128 and getting the exact speed for a 124 BPM track is all I wanted. No maths, no DAW, done in a browser tab.
Nina Petrov
Club DJ
Every song in my spin class has to sit at a set tempo. I prepare the whole playlist here the night before.
Carlos Rivera
Fitness Instructor
The Slowed + Reverb preset gets me most of the way, then I nudge the reverb and download the MP3 for my edit.
Mia Johnson
Content Creator
BPM Changer FAQs
Quick answers about changing the tempo and speed of a song.
How do I change the BPM of a song?
To change the tempo of a song, drop it into the BPM changer at the top of this page, then drag the speed control or type a target BPM. You hear the new tempo straight away and can download it as WAV or MP3.
How do I slow down a song without changing the pitch?
Leave Keep original pitch on and lower the speed. The tempo drops while every note stays in its original key, which is ideal for practice.
How can you slow down a song to learn it?
Here is how to slow down a track for practice: set the speed to 50% to 75%, drag across the waveform to loop the hard part, and raise the tempo a little each time you play it cleanly.
How do I speed up a song?
Raise the speed above 100% or type a higher target BPM. To increase audio speed without the chipmunk effect, keep the original pitch on; it works the same way to speed up MP3 files or any other track.
Will changing the tempo change the key?
Not by default. When you change audio tempo here, the tempo changer stretches the sound in time so the key stays put. Switch off Keep original pitch for vinyl mode, where pitch follows speed.
How far can I change the tempo?
From 50% to 200% of the original speed, in 1% steps. Changes within about 20% sound the most natural; bigger ones work well as effects.
How do I find the original BPM?
It is detected when the song loads and shown next to the new BPM. For a full analysis with the key and Camelot code, use the BPM and key finder.
Can I change the BPM of an MP3 and save it?
Yes. Change BPM of MP3, WAV, M4A, FLAC, OGG, AAC or MP4 files up to 200 MB and 15 minutes, then download a WAV or an MP3 in high, standard or small size. It works as an MP3 tempo changer and an audio tempo changer online, with no watermark.
What is the difference between tempo and speed?
Tempo is the pace of the beat in BPM; speed is how fast the recording plays. Change the speed by 10% and the tempo moves by 10%: a 120 BPM song at 110% plays at 132 BPM.
Can I loop a section to practice?
Yes. Drag across the waveform to set a loop, then change the tempo while it repeats until it feels right.
Can I change the key as well?
Yes. The pitch controls sit next to the tempo, or open the pitch changer when the key is the main job.
Are my files uploaded?
No. This BPM changer online, also an audio speed changer online, runs entirely in your browser, so your music never leaves your device. It is free, with no sign-in.
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Set a New Tempo With the Free BPM Changer
Free, private and instant: drop a track into the BPM changer above, set the tempo you need, compare it with the original and download WAV or MP3.