Changer Vitesse et Hauteur Audio — Gratuit en Ligne
Ajustez la vitesse (préserver la hauteur) ou décalez la hauteur.
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Drop audio file here
Taille max: ~2 Go (selon mémoire)
Who uses the Audio Speed & Pitch Changer
- Content creators preparing footage for YouTube, Instagram, TikTok, or X who need a quick fix without installing software.
- Teachers, marketers, and students who want a no-learning-curve way to handle everyday video tasks.
- Developers and editors who need a predictable FFmpeg-backed result on any machine.
Supported formats & limits
| Input formats | MP3, WAV, AAC/M4A, OGG, FLAC, Opus, WebM — any codec FFmpeg understands |
|---|---|
| Output formats | MP3 (192/320 kbps), AAC (192/256 kbps), WAV (lossless), OGG Vorbis, FLAC (lossless) |
| Max file size | Up to ~2 GB (limited by browser memory) |
| Max duration | No hard limit — multi-hour files work fine |
| Cost | Free for any use. No signup. No watermark on output. |
Audio Speed & Pitch Changer vs. the usual alternatives
| Feature | This tool | VEED (free) | Kapwing (free) | CapCut Online |
|---|---|---|---|---|
| File size limit | Up to ~2 GB in browser | 500 MB | 250 MB | 5 min / 1 GB |
| Upload required | No — runs locally | Yes | Yes | Yes |
| Watermark on output | No | No | Yes on free tier | Yes on free tier |
| Signup / account | No | Required | Required | Required |
| Works offline | Yes (after first load) | No | No | No |
| Export speed (1 min 4K, M2) | ~8 seconds | ~90 seconds incl. upload | ~2 minutes incl. upload | ~60 seconds incl. upload |
Why choose this audio speed & pitch changer
- 100% private — your files never leave your browser, so nothing is uploaded to our servers.
- No watermark, no signup, no hidden limits. Completely free to use, for any purpose.
- Runs on top of FFmpeg compiled to WebAssembly, giving you the same results professionals get in the terminal.
- Works on desktop and mobile, on any OS — only a modern browser is required.
Questions Fréquentes
What is the difference between speed and pitch?
Speed changes how fast the audio plays; pitch changes how high or low it sounds. Traditional “speed up” also raises pitch (like a tape played faster). This tool separates them so you can change one without affecting the other.
How does it preserve pitch while speeding up?
FFmpeg’s atempo filter time-stretches the waveform using phase-vocoder algorithms — keeping frequencies intact while packing or stretching the duration. Best quality stays within 0.5×-2.0× per filter; outside that range we chain atempo.
Why 12 semitones max?
12 semitones is one octave — either doubling or halving the pitch. Beyond that, pitch-shift artifacts become too severe to be useful.