Free Speed Changer

Change Video Speed

Speed up or slow down your videos. Create dramatic slow-mo effects or fast-paced time-lapses in seconds.

System Architecture
Zero-Exposure Pipeline

Media data remains local within the browser's volatile sandbox. FFmpeg is executed as a WebAssembly binary. No egress of raw bits occurs.

Core Compute Nodes

Single-threaded processing by default for max stability. Multi-threading enabled via SharedArrayBuffer where environment supports.

Shared by 85,000+ Developers

API CONTROL
Cluster: Lambda.6

Control Time

Whether you want to analyze a fast sports play in slow motion or compress a long drive into a short time-lapse, our speed changer tool gives you full control over playback rate.

Slow Motion

Slow down video to 0.5x, 0.25x or custom rates.

Fast Forward

Speed up video up to 4x or 8x for rapid action.

Audio Pitch

Choose to keep audio pitch normal or let it change with speed.

How to Change Speed

1

Upload Video

Select the video file.

2

Set Speed

Choosing a multiplier (e.g. 0.5x or 2.0x).

3

Convert

Process the video and download.

Frequently Asked Questions

Does audio speed change too?

Yes, by default it stays in sync, but you can mute it if you prefer.