Audio Trimmer
Cut audio files online, set start and end points, and export a clean clip.
Try it freeFree Audio Tool
Change audio speed without changing pitch
Slow down interviews or speed up long recordings from 0.25x to 4x. Preview changes instantly, preserve natural voice pitch independently, and download MP3 or lossless WAV without uploading the file.
Change speed from 0.25x to 4xPreserve pitch independently from speedPreview changes and the audio waveform in real timeExport MP3 or lossless WAV
Free browser tool
Runs locally in browserAudio Speed Changer
Press play above for a real-time preview. Speed and pitch settings update immediately.
Choose an audio file to see the resulting length before rendering.
Next step
Transcribe the edited audio when you need text
Start free, upload the prepared recording, and get an AI transcript with searchable text, speaker labels, timestamps, summaries, and TXT, DOCX, PDF, SRT, or VTT exports.
Related tools
More tools for audio speed changer
Continue editing or checking your file with a small set of relevant browser tools.
Audio Converter
Convert browser-supported audio into a downloadable WAV file.
Try it freeAudio Cleaner / Noise Reducer
Prepare speech audio for transcription with a browser-side voice-focused cleanup export.
Try it freeSilence Remover
Remove low-volume silence from speech recordings and export a shorter WAV file.
Try it freeVolume Normalizer
Normalize speech audio volume in your browser and export a louder, cleaner WAV copy.
Try it freeAudio Quality Checker
Check audio duration, volume, clipping, silence, channels, and transcription readiness.
Try it freeChange audio speed online for free
Upload an audio file, choose a playback speed from 0.25x to 4x, and render the changed-speed version in your browser. Keep natural voice pitch on, or turn it off for the classic speed-and-pitch effect.
Slow audio online or speed it up
Use slower speeds for interviews, lectures, podcasts, language practice, and hard-to-hear sections. Use faster speeds to review recordings quickly before creating a transcript or sharing a shorter review copy.
Voice speed changer for speech recordings
For voice notes, calls, interviews, and lectures, pitch-preserved tempo changes keep speakers recognizable while you review at the pace you need. Preview the result live, then export a smaller MP3 or a lossless WAV.
How it works
How to use the Audio Speed Changer
- Choose an audio file supported by your browser.
- Choose a speed from 0.25x to 4x and preview it with the waveform.
- Keep Preserve natural pitch on for voices, or turn it off for a pitch-shift effect.
- Choose MP3 or WAV, then click Change speed to render the result locally.
- Preview the rendered audio and download the file.
FAQ
Audio Speed Changer questions
Can I change audio speed online for free?
Yes. The Audio Speed Changer runs in your browser, so you can choose a speed from 0.25x to 4x, render the result, and download an MP3 or WAV for free.
Can I use this as a voice speed changer?
Yes. It works well as a voice speed changer for speech recordings such as interviews, lectures, voice notes, podcasts, and meetings.
Can I slow down audio online?
Yes. Set the slider below 1.0x to slow audio down. This is useful for reviewing interviews, lectures, podcasts, and sections that are difficult to hear at normal speed.
Can I speed up audio online?
Yes. Set the slider above 1.0x to speed audio up and create a shorter rendered copy for faster review or listening.
Is this an audio tempo changer?
Yes. Keep Preserve natural pitch enabled to change tempo and duration without the chipmunk or deep-voice effect. Turn it off when you want pitch to move with speed.
Can I export MP3 and WAV?
Yes. Choose MP3 for a smaller sharing file or WAV for a lossless result before rendering.
Does the audio speed changer upload my file?
No. The speed-change step runs locally in your browser. Your audio only uploads if you separately choose to transcribe it with InstantTranscriber.
Can I trim audio before changing speed?
Yes. Use the free Audio Trimmer to cut the section you need, download the trimmed clip, and then use this page to change the speed of that audio.