Change Video Speed

Create slow-motion effects or fast-forward long videos instantly.

Select Video File

Drag & Drop supported (MP4, WebM, MOV)

Max 50MB Recommended

Change Video Speed Online for Free

Do you have a video that is too long for an Instagram Story or TikTok? Or do you want to add a dramatic slow-motion effect to an action shot? HB Tools Video Speed Changer by Haridash lets you increase or decrease the playback speed of your MP4 and WebM videos instantly.

Dual Stream Synchronization (Video + Audio)

When you change the speed of a video, the biggest problem is that the audio usually goes out of sync, or the voices sound like robots.

Our advanced WebAssembly tool uses a Dual Filtering Algorithm. If you speed up a video by 2x, our tool will independently speed up the visual frames by 2x and mathematically compress the audio track by 2x simultaneously. This guarantees that people's lips moving and the sound they make will remain perfectly synchronized.

Fast Local Processing

Waiting hours for a server to process a slow-motion video is a thing of the past. HB Tools uses FFmpeg WebAssembly, meaning the heavy mathematical lifting happens directly inside your device's browser. Your private videos are never uploaded to any cloud server, ensuring absolute privacy.