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Audio & Video Speed Changer

Play lectures and voice notes faster, slow a song down to learn it, or make 'slowed' edits. The pitch stays natural at any speed from 0.25× to 4×.

  • No upload — 100% private
  • Fast, lossless when possible
  • Free & unlimited
  • Works on iPhone & Android

    Quality
    Advanced options
    Trim (optional)
    Use minutes:seconds, e.g. 1:05.5

    How to use the Speed Changer

    1. 1

      Choose audio or video.

    2. 2

      Pick a speed (1.25× and 1.5× are popular for lectures).

    3. 3

      Press Convert.

    Pitch stays natural

    We use time-stretching (FFmpeg's atempo filter), so voices don't turn into chipmunks when sped up or sound deep when slowed down. For videos, picture and sound stay in sync.

    Frequently asked questions

    Can I speed up WhatsApp voice notes?
    Yes. Select the .opus voice note and pick 1.5× or 2×.
    Does it change the file length?
    Yes. 2× speed halves the duration and 0.5× doubles it.

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