Audio Speed Changer: speed up or slow down any audio file in your browser

Upload an audio file and change how fast it plays from 0.25x to 4x. Choose Keep pitch to change the duration while the voice or music stays at the same pitch, or Tape effect to shift the pitch with the speed like a tape machine. See the original and the new duration side by side, click the waveform to set where the preview starts, then download as MP3 at the quality you need or as lossless WAV. Every output is stamped with blowfix.com metadata. Everything runs in your browser: your audio never leaves your device.

Drop your audio file here or click to browse

Supports MP3, WAV, OGG, FLAC, AAC, M4A, OPUS - Max 50 MB and 10 minutes per file

File

Speed

Playback speed

1.00x

Original speed

Speed level

1.00x

Quick presets

Pitch Handling

Keep pitch: the audio gets shorter or longer but the voice and music stay at the same pitch. Best for lectures, podcasts, and practice.

Duration

Original

Output

Waveform -

0:00 / 0:00

- Preview from 0:00.0

Click the waveform to set where the preview starts. The bottom lane shows the output at the new speed.

Speed changed audio -

MP3 Quality