Speed & Pitch Changer
Free online audio speed and pitch changer. Change playback speed without affecting pitch, or adjust pitch independently. Supports MP3, WAV, OGG, AAC. No software required.
About Speed & Pitch Changer
This online audio speed and pitch changer allows you to modify the playback speed and pitch of your audio files independently. Change speed to make audio faster or slower while keeping the same pitch, or adjust the pitch to make it higher or lower without changing the tempo. Perfect for music remixing, language learning, and creative audio editing.
What audio formats are supported?
Input: MP3, WAV, OGG, AAC, M4A, and other common formats. Output: You can choose to keep the same format as input or convert to MP3, WAV, OGG, or AAC.
What is the difference between Speed and Pitch?
Speed (tempo) changes how fast the audio plays - like fast-forwarding or slow motion. Pitch changes the tone - making voices sound higher or lower. This tool lets you change them independently, so you can speed up audio while keeping the original pitch, or change pitch while maintaining the original speed.
What are semitones?
A semitone is the smallest musical interval in Western music. +1 semitone raises the pitch by one note (e.g., C to C#), -1 semitone lowers it. +12 semitones = one octave higher, -12 semitones = one octave lower.
Can I speed up audio without changing pitch?
Yes! Simply change the Speed setting while leaving Pitch at 0. The tool will speed up or slow down the audio while preserving the original pitch. This is perfect for audiobooks, podcasts, or lectures.
Can I change pitch without changing speed?
Yes! Leave Speed at 1.0x and adjust the Pitch. This will raise or lower the tone while keeping the same playback duration. Great for music transposition or vocal effects.
What is the file size limit?
The maximum file size is 50MB. This ensures smooth processing in your browser.
How does changing speed affect duration?
Speed directly affects duration. 2.0x speed makes audio twice as fast (half the duration). 0.5x speed makes it half as fast (double the duration). The new duration is shown after processing.
What are common uses?
Speed up podcasts/audiobooks for faster listening, slow down music to learn instruments, create nightcore (faster + higher pitch) or daycore (slower + lower pitch) versions, transpose music to different keys, adjust audio to match video timing, and create chipmunk or deep voice effects.
Is my audio file safe?
Absolutely! All audio processing happens directly in your browser using FFmpeg.wasm. Your audio file is never uploaded to any server.