BPM Changer
Speed a song up or slow it down without changing its pitch — free and private
Last updated: August 11, 2026
Change your song's tempo in seconds:
Open BPM ChangerWhat Is BPM and Why Change It?
BPM — beats per minute — is how music measures speed. A ballad might sit at 70 BPM, a pop song near 120, a drum-and-bass track at 174. Changing a song's BPM means making it genuinely faster or slower, and the useful part is doing it without altering how the song sounds in every other way.
A good BPM changer uses time-stretching, so a track slowed from 120 to 90 BPM keeps its original pitch — no deep-voiced "slow-motion" effect, and no chipmunk voices when speeding up. The song simply plays at a new tempo, as if the band had performed it that way.
How to Change a Song's BPM
Open your song
Load your file into the speed changer. It is decoded right in your browser — nothing is uploaded anywhere.
Find the current BPM (optional)
If you need an exact number, use the free tap BPM counter — tap along with the beat for a few bars and it reads out the song's tempo.
Set the new speed
Drag the speed slider. 0.75× turns 120 BPM into 90; 1.25× turns it into 150. Preview instantly and adjust until the groove feels right.
Process and download
Render the new version and download it as MP3 or WAV, ready for your practice session, set, or routine.
Change BPM Without Changing Pitch
Old-school speed changes — spinning a record faster, playing tape at double speed — always dragged the pitch along: faster meant squeaky, slower meant deep and muddy. Time-stretching separates the two, so the tempo moves while every note keeps its original pitch.
The same tool also lets you deliberately link them again if you want the classic effect — the "slowed + reverb" sound leans on lowered pitch, and "sped up" edits embrace the chipmunk lift. But for practice, DJ prep, and choreography, pitch-locked BPM changing is almost always what you want.
What People Use a BPM Changer For
Instrument practice
Slow a difficult solo to 50–75% to learn it note by note, then step the tempo back up as it gets under your fingers — the classic "slow is smooth" method.
DJ sets and mashups
Nudge tracks toward a common BPM before a set, or check how two songs blend at the same tempo before committing to a transition.
Dance and choreography
Rehearse a routine slightly under tempo while learning the moves, then bring it back to full speed for performance runs.
Workouts and running
Match songs to your target cadence — many runners aim near 180 steps per minute, and a small BPM nudge puts a favorite song right on stride.
BPM Changer FAQ
Is the BPM changer free?
Yes — free with no signup, no watermark, and no limits. Everything runs in your browser.
Does changing BPM affect the pitch?
No — by default the pitch stays locked at the original, so the song just plays faster or slower. If you want the old-school linked effect, you can change pitch independently with the same tool.
How do I find out a song's current BPM?
Use the free tap BPM counter: play the song and tap any key in time with the beat. After a few bars it shows the tempo. Multiply that by your speed factor to know the new BPM.
How much can I change the tempo before it sounds bad?
Between about 0.7× and 1.4×, most songs stay clean. Beyond that, drums start to smear and transients soften. For practice purposes even 0.5× remains perfectly usable, just audibly processed.
Are my songs uploaded to a server?
No. The BPM change is computed locally on your device — files never leave your browser, and processing starts instantly regardless of file size.
Set Your Tempo
Faster, slower, same song — without the chipmunk effect.
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