Want to listen to a podcast at 1.5× speed, slow down a song to learn an instrument part, or speed up a lecture recording? Changing audio speed lets you adjust the playback rate without distorting pitch. QuickToolz does it free, in your browser — no app to download.
How to Change Audio Speed in 3 Simple Steps
How to Use Speed Up or Slow Down Any Audio Online
Step 1
Upload your audio file
Step 2
0.5×
Step 3
1× Set speed multiplier
Step 4
2×
Step 5
Download adjusted audio
- Upload your audio file – Drag and drop or click to upload your MP3, WAV, AAC, or OGG file.
- Set the speed multiplier – Use the slider: 0.5× for half speed, 1.5× for 50% faster, 2× for double speed.
- Download the adjusted audio – Click “Apply” then “Download” and your audio plays at the new speed.
→ Try Change Audio Speed free — no account needed
Does Changing Speed Affect the Pitch?
No — QuickToolz uses time-stretching to change speed without altering pitch. Voices won’t sound chipmunk-fast at 2× or unnaturally deep at 0.5×.
Why Speed Up Audio?
Listening to podcasts or lectures at 1.25×–1.5× speed is one of the most popular productivity habits. You consume the same content in significantly less time without losing comprehension.
Why Slow Down Audio?
Slowing audio is useful for learning music, transcription work, language learning, and analyzing speech patterns.
What Formats Are Supported?
MP3, WAV, AAC, and OGG. Output is saved in the same format as the uploaded file.