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Video Speed Changer

Drop video here or click to upload
Supports MP4, MOV, WebM up to 500MB

Video Editor

Duration
--
Resolution
--
Size
--

Select Playback Speed

1.00x

New duration: --

Audio Options

Processing Video...

0.0%
Loading video processor...

Speed Change Complete!

New Duration
--
Speed Applied
--

Why Use Our Video Speed Changer?

100% Private

Videos are processed entirely in your browser. Nothing is uploaded to any server.

Flexible Speed Control

Slow motion from 0.25x or speed up to 4x. Use presets or custom slider.

Audio Support

Keep audio with pitch correction or remove it completely.

Completely Free

No limits, no watermarks, no signup. Process unlimited videos.

FAQ

What's the maximum speed I can apply?
You can speed up videos up to 4x (4 times faster) or slow them down to 0.25x (4 times slower). Use the slider for fine control.
Will the audio pitch change?
When you keep audio, we apply pitch correction so voices and music sound natural even at different speeds. For extreme speeds, you may want to mute audio.
Is my video safe?
100% safe. All processing happens locally in your browser using FFmpeg.wasm. Your video never leaves your device.
What video formats are supported?
We support MP4, MOV, WebM, and M4V formats. The output is always MP4 for best compatibility.

About Video Speed Changer

Change video speed online free with FreeToolBox — speed up or slow down any video clip in your browser using FFmpeg.wasm. Speed adjustment is a popular editing technique: timelapse videos are created by speeding up footage 4×–32×, slow-motion replays require 0.25×–0.5×, and tutorial videos are often slightly sped up (1.5×–2×) for conciseness. Set any playback rate from 0.25× to 4×.

All processing runs locally using WebAssembly — your video never leaves your device. The output has no watermarks. Completely free, no account required.

Frequently Asked Questions

Will speeding up the video distort the audio pitch?

Without pitch correction, speeding up video raises audio pitch (chipmunk effect) and slowing down lowers it. The tool includes a pitch correction option so audio sounds natural at any playback speed.

What speed range is supported?

Speed multipliers from 0.25× (4× slow motion) to 4× (4× fast forward) are supported. For extreme timelapse effects, consider removing audio and using a higher multiplier.

What formats are supported?

MP4, MOV, WebM, and AVI as input. Output is MP4 (H.264) for maximum device compatibility.

Is my video uploaded to a server?

No. FFmpeg.wasm processes your video entirely in your browser. Your file stays on your device throughout.

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