Need to slow down an MP3 or audio file without it dropping in pitch — or shift a song into a different key without speeding it up or slowing it down? LoopTube lets you upload any MP3, WAV, or other audio file and adjust tempo and pitch completely independently: slow down to 25% speed with the pitch untouched, shift up to 12 semitones with the tempo untouched, or move both at once. Everything runs in your browser — your file is never uploaded to a server.
How to Slow Down or Pitch-Shift an Audio File
- Upload Your File — Open LoopTube and drop in an MP3, WAV, M4A, or other audio file. It loads entirely in your browser.
- Set a Loop Region — Drag the A and B markers to select the section you want to repeat.
- Adjust Tempo and Pitch — Independently — Slow down to any speed from 25% to 200% without the pitch dropping, or shift the pitch up to 12 semitones without changing the speed. Adjust either one alone, or both together.
Why Independent Pitch and Tempo Matters
Most tools only let you change playback speed — and changing speed always changes pitch along with it, which is why a slowed-down song sounds like it's underwater and a sped-up one sounds like chipmunks.LoopTube's time-stretching engine separates the two completely: tempo and pitch are each their own control, so you can slow a passage down to study it without it sounding warped, or shift into a different key without the tempo moving at all.
Who Slows Down and Pitch-Shifts Audio Files?
🎸
Musicians
Slow a solo down to 25% speed to catch every note, then shift the pitch to match a capo position or transpose into a key that suits your voice — without re-recording anything.
🎧
DJs & Producers
Pitch-match two tracks for a smoother mix, or test a sample in a different key, all without touching the tempo. The same independent control used in professional DAW software.
🗣️
Language Learners
Slow down a podcast or interview to catch every word, loop the tricky phrase, and repeat it until the pronunciation sticks.
📝
Transcribers & Podcast Editors
Drop speed to catch every word in a fast interview, loop a section to re-check a quote, all without warping the voice into a different register.
💃
Dancers & Choreographers
Break a routine down to quarter speed to see exactly what the feet and hands are doing, then loop just the hard section on repeat.
🎓
Students
Slow down a recorded lecture or a foreign-language listening exercise, and loop the part you didn't catch the first time.
Frequently Asked Questions
Upload your MP3 (or WAV, M4A, or other audio file) into LoopTube and drag the Tempo slider — it uses studio-grade time-stretching, so the pitch stays exactly where it is even down to 25% speed. This is different from just changing playback speed, which always drops the pitch too.
Yes — pitch and tempo are fully independent controls. Shift up or down by up to 12 semitones (a full octave either way) while the tempo stays completely unchanged. It's the same capability DJs and producers use for key-matching two tracks.
Any format your browser can decode — MP3, WAV, M4A, AAC, OGG, and FLAC all work.
No. Your file is decoded and processed entirely in your browser and is never sent to a server. You add it each session, and if you save loop points, only the start/end times sync to your account — never the audio itself.
LoopTube uses studio-grade time-stretching, the same class of algorithm found in professional DAW software, so tempo and pitch changes stay clean and natural at most settings. Results still depend on the source recording and how extreme the change is — very large shifts on dense or noisy audio can start to show artifacts, same as any time-stretching engine.
Yes. Looping and slowing down YouTube videos is free on LoopTube, forever — and so is uploading your own audio file with independent pitch and tempo control. LoopTube Pro adds exporting your finished result, keeping files on your device between sessions, and cloud-synced loop points.
Amazing Slow Downer and Transcribe! are long-established paid apps you install on your computer (Amazing Slow Downer also on phones). LoopTube does the core job — slow down without changing pitch and loop a section, plus shift the key of your audio files — in the browser, with nothing to install and YouTube built in. They go further in places: both have an EQ, and Transcribe! adds note and chord guessing. There's a full side-by-side comparison for each below.
Related Tools
Try It on Your Own Audio
Looping and slowing down YouTube videos is free on LoopTube, forever — and so is uploading your own audio with independent pitch and tempo control. LoopTube Pro adds exporting, keeping files on your device between sessions, and cloud sync.
Try it free