Don's Tools · Audio · Audio Speed Changer

Audio speed changer

Speed up or slow down any audio with the pitch kept natural for comfortable listening, then export a WAV at that speed, all in your browser.

Drop an audio file here
0:00 / 0:00
The player above keeps the pitch natural at any speed. The exported WAV changes pitch with speed (like speeding up a tape), because keeping pitch perfectly on export is not reliable in a browser. For comfortable listening, use the player.
Audio Speed Changer lets you play any audio faster or slower in your browser, with the pitch kept natural so speech and music still sound right, which is perfect for getting through lectures and podcasts quickly or slowing things down to transcribe or learn. Use the quick presets or the fine slider from a quarter speed up to four times, then export a WAV at the chosen speed. Everything is processed on your device with nothing uploaded.

Frequently asked questions

Is my audio uploaded anywhere?

No. The audio is loaded and processed entirely in your browser. Nothing is uploaded, and the file you export is created on your own device.

Does changing the speed change the pitch?

In the player, no. The player keeps the pitch natural while it speeds up or slows down, which is ideal for listening to speech or lectures. You can turn that off with the checkbox if you want the chipmunk or slow-tape effect.

Why does the exported file change pitch?

Exporting a sped-up file with the pitch perfectly preserved needs heavy time-stretching that is not reliable in a browser, so the export speeds the audio like a tape, which also shifts the pitch. For natural-pitch listening, use the player rather than the export.

What speeds can I use?

Anything from a quarter speed up to four times, with quick presets at 0.5, 0.75, 1, 1.25, 1.5 and 2 times. Slower is useful for transcribing or learning music, faster for getting through talks quickly.

What file types work?

Common audio files such as MP3, WAV, M4A, OGG and others your browser can decode. The export is always a WAV file, which is uncompressed and widely supported.