Change Video Speed

Speed up or slow down video from 0.25x slow motion to 4x fast forward.

Drop video or audio files here or browse your device

Files are processed locally inside browser memory. No uploads.

.mp4 · .mov · .mkv · .webm•As many files as your device can handle

Privacy-firstNo uploadsProcessed locallyWebCodecs & GPU acceleration active

Frequently Asked Questions

Are my video or audio files ever uploaded?

No. LocalVideoKit processes all media files directly in your web browser using HTML5 File APIs, WebCodecs, and WebAssembly. Your files are never sent to any server or cloud service.

How this tool works

Adjust video speed locally in browser from 0.25x to 4x without uploading your footage.