Change audio playback speed
Drag & drop video file here
Supports MP4, MKV, AVI, MOV, WebM and more
Drag & drop or browse. All audio formats supported.
Choose from 0.25x to 4x. Pitch stays natural.
Get your speed-adjusted audio. Pitch preserved perfectly.
Adjust audio playback speed from 0.5x to 4x. Pitch is intelligently preserved so speech and music remain natural at any speed.
Slow Down (0.5x–0.75x)
Slow playback for clarity and detail
Speed Up (1.5x–4x)
Faster playback for efficient listening
Pitch Preservation
Audio sounds natural at every speed
Speed adjustment transforms how you consume and create audio content.
Slow down foreign language audio for better comprehension and pronunciation practice.
Listen to podcasts and audiobooks at 1.5x or 2x speed to consume more content in less time.
Slow down complex passages to learn them note-by-note, then gradually increase speed.
Slow down speech recordings to make manual transcription faster and more accurate.
Your files never leave your device. Everything is processed using WebAssembly and browser APIs — no server uploads, no data collection, no privacy concerns.
Powered by Mediabunny and ffmpeg.wasm — multi-threaded, hardware-accelerated encoding that makes media processing feel instant.
MP4, MOV, MKV, WebM, AVI, FLAC, WAV, AAC — if it exists, we handle it. Full multi-channel audio support with surround preservation.