Audio Speed Changer
Free Online Song Speed Changer
Upload a song, slow it down or speed it up, preview the result, and export your edited audio as MP3 or WAV. No signup required. This audio speed changer runs in your browser.
Upload Audio
Supports MP3, WAV, FLAC, OGG, and M4A
1.00x Speed
Standard Key
120 BPM
120 BPM
0.75x = much slower. 0.85x = common slowed reverb speed. 1.00x = original speed. 1.25x = faster. 1.50x = much faster.
How to Change Audio Speed Online
Upload your audio file
Choose an MP3, WAV, FLAC, or OGG file from your device.
Choose the speed
Move the speed control below 1.00x to slow the song down or above 1.00x to speed it up.
Preview the result
Listen before exporting so you can check the timing, vocals, and overall feel.
Download your edited audio
Export your speed-changed track as MP3 or WAV.
Recommended Audio Speed Settings
| Use Case | Speed | Notes |
|---|---|---|
| Slowed reverb style | 0.80x to 0.88x | Common range for slower, moodier edits. Pair with reverb on the Slowed Reverb Generator. |
| Light slow down | 0.90x to 0.95x | Makes a song slightly slower while keeping it close to the original feel. |
| Practice mode | 0.50x to 0.80x | Useful for learning melodies, lyrics, guitar parts, piano parts, or fast sections. |
| Podcast or speech | 1.10x to 1.50x | Speeds up spoken audio while still keeping it understandable. |
| Nightcore-style speed | 1.15x to 1.30x | Pair with higher pitch on the Nightcore Maker for a brighter, faster edit. |
Start with small speed changes first. Large changes can make vocals, drums, or instruments sound less natural.
Why Use This Online Audio Speed Changer?
Browser-based speed editing
Change audio speed without installing music software.
No signup required
Use the speed changer directly in your browser.
Slow down or speed up audio
Make songs slower for practice or faster for creative edits.
MP3 and WAV export
Download a shareable MP3 or a higher-quality WAV file.
Useful for music and speech
Edit songs, voice recordings, podcasts, lessons, and practice tracks.
Private processing
Your audio is processed in your browser instead of being uploaded to a server.
What Does Changing Audio Speed Do?
Changing audio speed makes a song or recording play slower or faster. Slowing audio down can make vocals feel deeper, give creators more space for slowed reverb edits, or help musicians practice difficult parts. Speeding audio up can create energetic edits, nightcore-style tracks, or faster speech playback. This tool changes speed and pitch together, so lower speed also lowers pitch and higher speed raises pitch. Small speed changes usually sound more natural. Large changes can create artifacts, especially on vocals, drums, or full mixes. Previewing the result before download helps you find a speed that fits the edit without pushing the song too far.
Speed Change vs Pitch Shift
Speed change controls how fast the audio plays. Pitch shift controls how high or low the audio sounds. Some tools change speed and pitch together, while other tools preserve pitch while changing speed. This speed changer uses varispeed, so slowing down also lowers pitch and speeding up raises pitch. For slowed reverb, users often slow the speed and sometimes lower pitch with the Slowed Reverb Generator. For nightcore, users often speed up the song and raise pitch with the Nightcore Maker. To change key more directly, use the Pitch Shifter. Pick the speed tool when timing is the main goal, and use pitch tools when the song key or vocal tone matters more than duration.
More Free Audio Tools
Slowed Reverb Generator
Slow songs and add reverb online.
Pitch Shifter
Raise or lower the pitch of a song.
Nightcore Maker
Make fast, high-pitched nightcore edits online.
Bass Booster
Increase low-end bass in songs and audio files.
Best Slowed Reverb Settings
Learn useful speed, pitch, and reverb settings for slowed edits.
How to Make Slowed Reverb Songs
Follow a simple workflow for making slowed reverb songs.
Audio Speed Changer FAQ
What is an audio speed changer?
An audio speed changer is a tool that makes a song or recording play slower or faster. You can upload audio, choose a speed, preview the result, and download the edited file.
Can I slow down an MP3 file?
Yes. You can upload an MP3 file and move the speed below 1.00x to slow it down. Large slowdowns can sound less natural, so preview before downloading.
Can I speed up a song online?
Yes. Move the speed above 1.00x to make the song play faster. Settings around 1.15x to 1.30x are common for faster creative edits.
Does changing audio speed change pitch?
In this tool, yes. The speed changer uses varispeed playback, so slowing audio lowers pitch and speeding audio raises pitch. Use the Pitch Shifter if you want to focus on key changes.
What speed is recommended for slowed reverb?
A common slowed reverb range is about 0.80x to 0.88x. Start near 0.85x, preview the song, and adjust until the vocal and rhythm feel right.
What speed is recommended for nightcore?
Nightcore-style edits often use about 1.15x to 1.30x speed. For a brighter sound, use the Nightcore Maker to combine faster speed with higher pitch.
Can I use this audio speed changer on mobile?
Yes. The tool works in modern mobile browsers and processes audio in the browser. Keep file sizes reasonable for smoother mobile performance.
Can I download the speed-changed audio?
Yes. After previewing the result, you can download the speed-changed audio as MP3 or WAV. Choose MP3 for sharing or WAV for a larger editing file.