01
Upload Your Audio
Choose a song, beat, vocal, podcast, or loop from your device. MP3, WAV, M4A, FLAC, AAC, and OGG are common choices.
Free online tool
Change Audio Speed Online
Upload audio, set speed and pitch, render a preview, then download a WAV file.
Set Up Your Change
Upload audio, then choose a speed, target BPM, and pitch shift.
Keep this at 0 to preserve the original key while speed changes. Move it to transpose the result independently.
Preview Result
Render and listen to the selected speed and pitch before you download.
Upload audio to preview
Your processed speed-and-pitch preview and download controls will appear here.
New speed
1.00x
Estimated BPM
120
New length
--:--
Speed and pitch are rendered locally in this browser. Your audio is not uploaded.
Free online toolChange speed, tempo, and BPM
Free Music Speed Changer
Slow Down or Speed Up Audio
Upload a song, beat, vocal, podcast, or loop. Change the speed online for free. Slow music down for practice, speed audio up for quick review, or match a target BPM for edits, DJ sets, workouts, and remixes.
Need the original tempo? Find the BPM first then choose your target speed.
Three Simple Steps
How to Change Music Speed Online for Free
Upload a file, set the speed or target BPM, and choose a pitch. Then render a preview and download the result.
02
Choose Speed or Target BPM
Choose a speed or enter the current and target BPM. Leave pitch at 0 to keep the original key, or shift it by semitones.
03
Preview & Download
Render a local preview. Check the timing and pitch, then download the same result as a WAV file.
Upload your audio to test the controls.
Upload AudioUse Cases
Music Speed Changer Use Cases
Set the right pace for practice, editing, DJ prep, workouts, spoken audio, and remixes.
Musicians and Students
Practice at the Right Speed
Slow down hard parts and practice at a comfortable pace. Learn riffs, solos, drum fills, chord changes, or vocal lines before returning to full speed.
Slow hard parts
Count the rhythm
Return to full speed
MakeBPM Advantage
Change Tempo by BPM, Not Guesswork
Use BPM when timing matters. Enter the current and target tempo, and MakeBPM calculates the required speed.
Current
128 BPM
Target
96 BPM
Speed
0.75x
Required speed = Target BPM ÷ Current BPM. For this example, 96 ÷ 128 = 0.75x.
1
Find the Current BPM
Detect the tempo or enter it yourself. This gives MakeBPM a clear starting point.
2
Set the Target BPM
Enter the tempo you need. MakeBPM calculates the required playback speed.
3
Preview the Result
Listen before you export. If the count feels half-time or double-time, correct the BPM and render again.
Know the Controls
Speed, BPM, and Pitch: Choose the Right Control
Speed controls duration. BPM sets a tempo target. Pitch changes the musical key. Each control can be set separately.
Quick rule
Use speed for duration, BPM for timing, and pitch for key or vocal range.
01
Speed
Changes playback length. Use a value below 1x to slow audio down or above 1x to speed it up.
02
BPM
Sets a tempo target. MakeBPM calculates the speed from the current and target BPM.
03
Pitch
Moves the audio up or down from -12 to +12 semitones without changing the selected speed.
04
Original Key
Leave pitch at 0 semitones to change speed while keeping the original musical key.
Music Speed Changer Before and After
Compare the same AI-generated track at its original tempo and 0.75x speed, with the pitch unchanged.
Sunny Vlog BGM
AI-generated instrumental, 95 → 71 BPM
Before
Original
95 BPM, 1.00x, original pitch
0:000:12
After
Slowed
≈71 BPM, 0.75x, same key
0:000:16
Same passage, 0.75x speed, pitch unchanged.
Try 0.75xWant the full method, BPM formula, and quality checks? Read how to slow down a song without changing pitch.
Files and Output
Use the Audio Files You Already Have
Your audio stays on your device. Process supported files in a modern browser, then export the result as WAV.
Processed on your device
Speed, pitch, preview, and WAV rendering run locally in your browser. Your audio is not uploaded to a server.
Browser Support
Use a modern browser with Web Audio and AudioWorklet support. Keep this tab open while your file is processing.
Input Formats
Choose MP3, WAV, M4A, AAC, FLAC, or OGG. Decoding support depends on your browser and operating system.
WAV Export
Downloads are uncompressed 16-bit PCM WAV files. MP3, M4A, and AAC export are not available.
Processing Limits
Large speed or pitch changes may add audible artifacts, especially to vocals, drums, cymbals, and reverb. Longer files take more time and memory to process.
Related Tools
Continue Your Music Workflow
Find the BPM or key, turn audio into MIDI, or extend a track.
FreeFree
BPM Finder
Find a track’s tempo for edits, loops, practice, and remixes.
Key Finder
Detect key, scale, and Camelot code for harmonic mixing.
Audio to MIDI
Turn melodies, vocals, instruments, or stems into editable MIDI notes.
AI Music Extender
Extend songs, loops, and unfinished demos with a new continuation.
Music Speed Changer FAQ
Questions About Music Speed, BPM, and Pitch
Still have questions? Email our support team at support@makebpm.com.
Last updated:
Can I use this as a song speed changer or an audio speed changer?
Yes. Choose an MP3, WAV, M4A, AAC, FLAC, or OGG file. Set the speed from 0.25x to 2x. Keep Pitch at 0 to preserve the original key. Preview the result in your browser and export it as a WAV file.
Is this music speed changer free?
Yes. The speed changer is free to use and does not require MakeBPM credits.
How do I slow down or speed up audio?
Upload a file and choose a speed. Values below 1x slow it down. Values above 1x speed it up. Render a preview before you download.
Can I change a song to a target BPM?
Yes. Enter the current and target BPM. MakeBPM calculates the required speed and shows the new duration before export.
Can I change pitch without changing speed?
Yes. Adjust pitch independently from -12 to +12 semitones. Set it to 0 to keep the original key. Your pitch setting applies to both the preview and exported WAV.
What audio formats are supported?
Choose MP3, WAV, M4A, AAC, FLAC, or OGG. Decoding support depends on your browser and operating system.
Is my audio uploaded?
No. Decoding, speed and pitch processing, preview, and WAV rendering run locally in your browser.
What can I download?
You can download the processed result as an uncompressed 16-bit PCM WAV file. MP3, M4A, and AAC export are not available.
Will large speed or pitch changes affect quality?
They can. Extreme changes may add artifacts to vocals, drums, cymbals, and reverb. Smaller adjustments usually sound more natural.
Change Speed.
Match BPM. Keep Creating.
Change speed, match a target BPM, or shift the key. Preview the result and export a WAV file for free.
Upload Audio