Scribeify

Changer la vitesse d’une vidéo — lent ou rapide

Accélérez ou ralentissez n’importe quelle vidéo. Choisissez entre 0,25× et 4×. Le traitement a lieu dans votre navigateur, votre vidéo reste privée.

Comment utiliser Changer la vitesse d’une vidéo — lent ou rapide en 3 étapes

  1. 1

    Select a video

    Drag and drop or browse. Supports MP4, MOV, AVI, MKV, WebM up to 2 GB.

  2. 2

    Pick the speed

    Choose from presets (0.25×, 0.5×, 2×, 4×) or enter a custom multiplier.

  3. 3

    Download

    Browser re-encodes the file and provides a direct download — no upload step.

Pourquoi choisir Changer la vitesse d’une vidéo — lent ou rapide

  • Wide speed range

    From 0.25× slow motion to 4× time lapse, and any custom value in between.

  • Nothing uploaded

    Your video is processed entirely in your browser, never sent to a server.

  • Audio handling

    Choose to keep audio (pitch-shifted) or drop it entirely when changing speed.

  • Free and unlimited

    No sign-up, no watermarks, use as often as you want.

Qui utilise Changer la vitesse d’une vidéo — lent ou rapide

  • Slow-motion sports

    Review a goal or a great play frame by frame by slowing clips to 0.25×.

  • Cooking time lapse

    Speed up a 30-minute recipe video to a watchable 3-minute time lapse.

  • Funny speed-ups

    Create the classic "sped-up voiceover" effect for social media posts.

Conçu pour les créateurs du monde entier

Conçu pour les créateurs, journalistes, étudiants et chercheurs du monde entier.

Questions fréquentes

How fast or slow can I go?
From 0.25× (quarter speed) to 4× (four times faster). Custom values are supported.
Does it keep the audio?
Your choice. You can keep audio (pitch will change with speed) or strip it.
Is this service free?
Yes, unlimited and without watermarks.
Will quality change?
Quality is preserved during re-encoding. For most content, no visible quality loss.
Are my files uploaded?
No. Processing runs in your browser via WebAssembly.
Does it support all video formats?
Input: MP4, MOV, AVI, MKV, WebM, FLV, WMV. Output: MP4.

Outils connexes