Change Speed

Faster. Slower.

Time is relative.

Runs in your browser. Your recordings never leave your device.

Drop an audio file here

.mp3 .wav .m4a .ogg .aac .flac · tap to browse

Done. Time adjusted.

✓ Fwipped
Never left your device
No upload
Works offline
We never hear your audio

Need to change speed on hundreds of files? The offline bundle handles batches with no size limit. $99 once.

Get Bundle →
// How it works

Three steps. Zero uploads.

01
Drop
Drag your audio file onto the page. MP3, WAV, M4A, OGG, FLAC. It stays on your device.
02
Set speed
Choose a preset or use the slider. 0.25× (very slow) to 4.0× (very fast).
03
Compare
Listen to original and speed-adjusted versions. Download the result.
// Why this is different

Your audio never leaves your machine.

Most online audio speed changers upload your file to a server. fwip adjusts speed entirely in your browser — your recordings stay private.

fwip works differently. The processing engine runs entirely in your browser. Your audio is read from your device, processed on your CPU, and the result is saved back to your device. No server is involved. We literally cannot see your file.

No server processing

Everything runs on your device using WebAssembly. Your file never touches a network.

No account required

Drop a file. Get a result. No sign-up, no email, no password.

No subscription

Free in the browser. $99 once for the offline bundle. That's it. Forever.

Works offline

The desktop version works with no internet connection at all.

// How fwip compares

fwip vs the rest.

fwipAudioAlterAudacityAdobe Audition
Upload requiredNoYesNoNo
Account requiredNoNoNoYes
Price$15 / toolFreeFree/yr
Files leave deviceNeverAlwaysNeverNo
Works offlineYesNoYesYes
Batch processingOffline bundleNoYesYes
// Questions

Frequently asked.

Can I speed up audio without changing pitch?▾
Yes. fwip uses FFmpeg's atempo filter which adjusts speed while preserving pitch. The audio sounds faster or slower without the "chipmunk" or "deep voice" effect.
What's the maximum speed?▾
You can go from 0.25× (4 times slower) to 4.0× (4 times faster). Extreme speeds may affect audio quality.
Does this work with podcasts?▾
Absolutely. Speeding up podcasts to 1.5× or 2.0× is a common way to save time. The pitch stays natural so speech remains clear and understandable.
Can I slow down audio for transcription?▾
Yes. Slowing audio to 0.5× or 0.75× makes it easier to transcribe. The pitch stays the same so words remain clear.
What formats are supported?▾
MP3, WAV, M4A, OGG, AAC, and FLAC as input. Output is available as MP3 or WAV.
// Related tools

You might also need.

AUDIO
Reverse Audio
Play audio backwards.
 AUDIO
Trim Audio
Cut start and end points.
 AUDIO
Adjust Volume
Make audio louder or quieter.
 AUDIO
Fade Audio
Add fade in/out effects.
 AUDIO
Remove Silence
Auto-remove silent sections.
 AUDIO
Clean Audio
Remove background noise.

Like it? Own it.

Offline. No browser. No internet. No excuses.
$15
This tool
  • Change Speed · offline
  • Batch processing
  • No file size limit
  • 3 devices · one payment
Join waitlist →
$49
Audio bundle
  • All 30 audio tools · offline
  • Batch processing
  • No file size limit
  • 3 devices · one payment
Get Audio bundle →
$99
Complete suite
  • All 200+ tools · offline
  • No file size limit
  • No daily use limit
  • 3 devices · one payment · updates included
Join waitlist →
One-time payment · 3 devices · Updates included · Mac + Windows + Linux