Free Audio Speed Changer

The Audio Speed Changer is a free online tool that change audio playback speed with pitch correction. supports mp3, wav, ogg files. It runs entirely in your browser with no installation or sign-up needed.

You can toggle pitch correction on/off. With correction enabled, the pitch stays the same at different speeds.

MP3, WAV, OGG, and AAC audio files.

Yes, completely free.

Absolutely. The Audio Speed Changer processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Audio Speed Changer is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Audio Speed Changer in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Audio Speed Changer works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

This tool gives you seven fixed playback speeds: 0.25x, 0.5x, 0.75x, 1x, 1.25x, 1.5x, and 2x. The number is a multiplier on the original tempo, so it also changes the running time in proportion. At 2x a 60-minute recording finishes in 30 minutes, while 0.5x stretches that same hour to two. The 0.75x option is the gentlest slow-down, handy when full speed is only slightly too quick to follow, and 1.25x or 1.5x trim down a slow-talking lecture. As soon as you load a file, the tool shows the original duration next to the new duration at your chosen speed, so you can see the trade-off before committing. Drop in your MP3, WAV, OGG, or AAC file and pick the rate that fits.

Load the track, choose 0.5x or 0.75x to give yourself time on tricky passages, and keep the pitch correction toggle enabled so the music stays in its original key. Normally slowing audio down drops its pitch, which makes it useless for playing along on an instrument; this tool counteracts that by shifting the audio in the opposite direction, by -1200 x log2(speed) cents, to cancel out the change. That means a guitar solo at half speed still sounds in tune, just slower, so you can work it out note by note. You can preview the slowed version directly in the page before exporting, and a waveform shows the loudest moments at a glance. When ready, Download WAV renders the whole file at your chosen speed for offline practice.

Leave pitch correction on for anything where the tone needs to stay natural, such as speech, vocals, or music you want to play along with. Turn it off when you actually want the classic sped-up or slowed-down effect. With correction disabled, speeding audio up raises the pitch and makes voices sound high and chipmunk-like, while slowing it down deepens everything. That is exactly what you want for deliberately lowering a voice, creating a comic fast-talk effect, or chasing a vaporwave-style slow-down where the pitch shift is the whole point. Correction is enabled by default because most everyday uses, like transcribing speech or compressing a lecture, sound better with the original pitch held steady. Flip the toggle either way, preview the result, and export the version you prefer.

The export is always a WAV because the tool renders the sped-up or slowed-down audio losslessly through the browser's Web Audio API, and WAV is the uncompressed format every editor and media player accepts. Re-encoding back to MP3 would add a second round of lossy compression and require a separate encoder, so the tool skips that and hands you clean, full-quality audio instead. The trade-off is file size: WAV files are noticeably larger than MP3s of the same clip. The export is also mixed down to a single mono track, and the file is named after your original with the speed appended, such as lecture_1.5x.wav. Because everything is processed on your own device, longer recordings take a moment to render. Adjust your speed, then click Download WAV to save it.

Yes. Drop the audio in, choose 1.25x or 1.5x, and keep pitch correction on so the speaker's voice stays natural rather than turning squeaky. A 1.5x setting cuts a 60-minute lecture to about 40 minutes, and 2x halves it to 30, which is ideal for slow-paced talks or recordings you have already heard once. Before exporting you can play the faster version right in the page and pause or stop whenever you like, so you can test whether a speed is still comfortable to follow. If the audio is a private voice memo or an unreleased recording, nothing is uploaded anywhere because the file is decoded and processed locally in your browser. Load your file, pick a faster rate, and either listen straight away or Download WAV to keep the condensed version.