Video Speed Changer
Change video playback speed online. Speed up or slow down videos from 0.1x to 32x without installing software.
How do I change the speed of a video?
Upload your video file, select the desired playback speed (0.1x to 32x), and click the process button. The tool will generate a new video with the adjusted speed.
What speed range is supported?
The tool supports playback speeds from 0.1x (tenth speed) to 32x (thirty-two times faster). You can choose common presets like 0.5x, 0.75x, 1.5x, 2x, or enter a custom value.
Is my video data safe?
Yes, all processing happens locally in your browser using WebAssembly. Your video files are never uploaded to any server, ensuring complete privacy and security.
What video formats are supported?
The tool supports most common video formats including MP4, AVI, MKV, MOV, WebM, and more. The output is always saved as MP4 for maximum compatibility.
Can I speed up and slow down the same video?
Yes, you can process the same video multiple times with different speed settings. Each processing creates a new output file.
Does changing speed affect video quality?
The tool uses FFmpeg with high-quality encoding settings. While some quality loss is inevitable during re-encoding, the output maintains good visual quality.
How long does processing take?
Processing time depends on video length, file size, and your device performance. Larger files and extreme speed changes may take longer.
Can I preview the video before processing?
Yes, you can preview the original video after uploading. However, speed changes are only visible in the output file after processing.
Do I need to install any software?
No, this is a completely web-based tool. Everything runs in your browser, so no downloads or installations are required.
Is this tool free to use?
Yes, the video speed changer is completely free with no limitations on file size or number of conversions.
What happens to audio when I change video speed?
The audio speed is automatically adjusted to match the video speed. The tool uses FFmpeg's atempo filter to maintain audio quality across different speeds.
Can I use this on mobile devices?
Yes, the tool is fully responsive and works on smartphones, tablets, and desktop computers.