Audio Speed Changer Online
Speed up or slow down any audio file right in your browser — 0.5× to 2× with one tap. Pitch moves with speed, record-player style. No sign-up, and your file is never uploaded.
How to Speed Up or Slow Down Audio
No account, no upload — three steps on your own device.
Drop Your Audio
MP3, WAV, M4A, FLAC, OGG, AAC, or WebM up to 200 MB. It decodes right in the browser.
Pick a Speed
Tap 0.5×, 0.75×, 1.25×, 1.5×, or 2×. The new duration is calculated live, so you know what you'll get.
Apply & Download
Hit Apply Speed, preview the result, and download the MP3 at the bitrate you want — no queue, no watermark.
Why Notevibes Audio Speed Changer
Five presets, one button, honest about the tradeoffs.
Five Speed Presets
0.5×, 0.75×, 1.25×, 1.5×, and 2× — one tap each. The speeds people actually use, with the new duration calculated live before you commit.
Honest About Pitch
This is a classic speed change: faster raises the pitch, slower lowers it — like a record at the wrong RPM. The tool tells you, not the fine print.
Never Uploaded
The speed change runs entirely in your browser. Your file never leaves your device — there is nothing to delete because nothing was sent.
Every Common Format
MP3, WAV, M4A, FLAC, OGG, AAC, WebM — anything your browser can decode loads, up to 200 MB.
Preview, Then Download
Listen to the sped-up or slowed result first, then download an MP3 at the bitrate you choose — 64 to 320 kbps.
Free, Anywhere
No watermark, no sign-up, no daily limits. Works on phones, tablets, and laptops in any modern browser.
Nothing to Upload, Nothing to Wait For
The speed change happens on your own device. Your file never touches a server — which is a stronger promise than any “we delete it later”.
No Upload
Decoding and re-timing run on your device
No Account
Start changing speed immediately
Works Offline
Once the page loads, no connection needed
What People Speed Up (and Slow Down)
Five presets cover almost every real-world case.
Nightcore & Sped-Up Edits
Classic 1.5× and 2× sped-up remixes for TikTok, Reels, and Shorts
Slowed + Reverb Vibes
Drop a track to 0.75× for that low, dreamy slowed aesthetic
Faster Podcasts
Push episodes to 1.25× or 1.5× and get through more in the same commute
Transcribing Interviews
Slow dictations to 0.75× so you can type without rewinding
Language Learning
Take foreign-language clips to 0.5× to catch every syllable
Faster Audiobooks
Speed up a chapter without juggling a separate player app
One Tap Faster, One Tap Slower
Sometimes you just need the file itself to be faster or slower — a podcast your player won’t speed up, an interview you’re transcribing, a track you want to turn into a sped-up edit. Most sites that do this make you upload the file, wait in a queue, and take a watermark or an email address on the way out. This one re-times the audio on your own device and hands it straight back, usually in under a second.
Pitch moves with speed — on purpose
This tool does a classic speed change: like vinyl played at the wrong RPM, speeding up raises the pitch and slowing down lowers it. For nightcore, sped-up TikTok edits, and slowed + reverb remixes, that coupling is the sound — it’s exactly what you want. But if you’re slowing a solo to practice it or speeding up a lecture and want voices to stay natural, use the audio tempo changer instead — it changes duration while keeping the pitch locked.
Slow down audio as easily as you speed it up
Making audio slower is the same one tap in the other direction. Drop an MP3 of an interview you’re transcribing, a solo you’re learning, or a song where the words go by too fast, and the 0.75× preset gives you a gentle slowdown while 0.5× halves the speed entirely. When you need the opposite — increasing the speed to get through a recording faster — the 1.25×, 1.5×, and 2× presets work exactly the same way.
Private by physics, not by promise
Your file is decoded and re-encoded entirely in the browser — it never reaches a server, so there’s nothing for anyone to store, scan, or forget to delete. That’s also why it’s free with no caps: your device does the work, so there’s no compute bill to gate behind a sign-up.
The rest of the time-and-pitch family
Want to change only the key and leave the timing alone? That’s the audio pitch changer. Not sure what tempo the track is at before you start? Run it through the BPM detector first. And for anything beyond a single change — cuts, fades, stacked effects — open the file in the online audio editor.
Need More Than a Speed Change?
The full Notevibes editor trims, mixes, changes tempo and pitch, and applies AI cleanup to your audio — then exports to MP3 or WAV.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Audio Tempo Changer
Speed up or slow down while keeping pitch unchanged.
Audio Pitch Changer
Shift pitch up or down without changing duration.
Audio Reverser
Play any audio file backwards.
Voice Changer
Chipmunk, helium, deep, giant, or demon voice effects.
Audio Normalizer
Boost audio to peak volume without clipping.
MP3 Editor
Full MP3 editor with timeline, effects, and export.
Audio Speed Changer FAQ
Is my file uploaded to a server?
No. The speed changer runs entirely in your browser — the file is decoded, re-timed, and re-encoded on your own device. Nothing is transmitted, so there is nothing for us to store or delete.
How do I change audio speed online?
Drop your audio file onto the tool, tap one of the five presets (0.5×, 0.75×, 1.25×, 1.5×, or 2×), and click Apply Speed. Preview the result, then download it as an MP3 at the bitrate you choose. Everything runs in your browser.
Can I speed up a voice recording?
Yes — drop the voice memo, lecture, or interview MP3 onto the tool, tap 1.25×, 1.5×, or 2× to increase the speed, then preview and download. Because everything runs on your own device with no upload or sign-up, it's the fastest free way to speed up voice online.
Does the pitch change too?
Yes — and we say so upfront. This is a classic speed change, like a vinyl record spun at the wrong RPM: speeding up raises the pitch, slowing down lowers it. That coupling is exactly what nightcore and slowed edits want. If you need the speed to change while the pitch stays put, use the audio tempo changer instead — it time-stretches without touching the key.
What are the preset speeds?
Five presets: 0.5× (half speed, an octave lower), 0.75× (gentle slowdown), 1.25× (slightly faster), 1.5× (the common podcast speed), and 2× (double speed — the nightcore classic).
What format is the output?
An MP3 at the bitrate you pick, from 64 to 320 kbps. The filename includes the speed rate — for example song-1.5x.mp3 — so you can always tell versions apart.
Is the audio speed changer free?
Yes — completely. Because the processing runs on your device rather than our servers, there is nothing to meter: no watermark, no sign-up, no daily limits.
Does it work on my phone?
Yes — iOS and Android browsers included. Tap to upload, tap a preset, tap Apply Speed, preview, download. Long files process faster on a laptop simply because the processor is faster.