Speed up lectures, slow down music for practice, or adjust playback rate — all while preserving the original pitch.
Supports MP3, WAV, OGG, FLAC and more
4 simple steps to get started.
Select your audio file to adjust.
Choose your desired playback speed.
Listen to the speed-adjusted audio.
Download the modified audio file.
Everything you need to edit audio — right in your browser.
Boost low-end frequencies to add depth and punch to your audio.
Merge multiple audio files into a single track seamlessly.
Convert between MP3, WAV, OGG, FLAC, and more formats.
Increase or decrease the volume of your audio files.
Speed up or slow down audio without changing the pitch.
Add smooth fade-in and fade-out effects to your tracks.
Record audio directly from your microphone in the browser.
Adjust bass, treble, and mid frequencies to fine-tune sound.
Reverse any audio file instantly for creative effects.
Create custom ringtones from any audio file you have.
Remove background noise and clean up your audio recordings.
Extract audio tracks from video files quickly and easily.
Shift the pitch of audio up or down without changing speed.
Reduce dynamic range for consistent, polished audio levels.
Remove vocals from songs to create karaoke or instrumental tracks.
Split audio files into equal or fixed-length segments.
Everything you need to know about speed changer.
Speed up lectures, slow down music for practice, or adjust playback rate — all while preserving the original pitch. No downloads, no sign-ups, and no accounts. Editing and preview run locally in your browser using the Web Audio API; exporting sends your file over an encrypted connection to our processing server, which deletes it as soon as your download finishes.
Simply upload your audio file — MP3, WAV, OGG, FLAC, or M4A — and use our intuitive editor to make your changes. Upload audio, Set speed, Preview, Export. Once you're satisfied, export the result in your preferred format instantly.
Whether you're a podcaster, musician, content creator, or just someone who needs a quick audio edit, Speed Changer is built for you. It works on any device — desktop, tablet, or mobile — across all modern browsers including Chrome, Firefox, Safari, and Edge.
The naive way to speed audio up is to play it back faster, which is what happens when a tape runs quick: everything rises in pitch and voices turn comical. That is almost never what you want. This tool uses time stretching instead, which resamples the audio in short overlapping windows so the duration changes while the pitch stays where it was. Speech sped up to 1.5x still sounds like the same person, just talking faster.
The range runs from 0.25x to 4x. Values well outside 0.5x to 2x are chained internally in stages rather than applied in one pass, because time stretching degrades if pushed too far in a single step. That keeps extreme settings usable, but they are still where artefacts show up first.
If you actually want the old tape effect — faster and higher, or slower and lower — apply this tool and the Pitch Changer together in the same direction. Speeding to 2x and raising pitch by twelve semitones reproduces what doubling playback rate does naturally.
If you want to change pitch and keep the length, use the Pitch Changer on its own; it compensates internally so the duration does not move. The two tools are deliberately independent so you can adjust one without dragging the other along with it.
Preview runs in your browser. The stretch itself is applied on the server when you export, and the uploaded file is deleted as soon as your download completes.
Everything you need to know about Speed Changer.