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.
How to Use Video Speed Changer
Speed up or slow down any video from 0.1x to 32x right in your browser. The file is processed locally, so it never leaves your device.
- Open the Video Change Speed tool and drop your video into the file area, or click it to pick a file.
- Drag the speed slider or type an exact value to set playback anywhere between 0.1x and 32x.
- Play the preview to check that the new pace feels right before exporting.
- Adjust the value again if needed — 0.5x for slow motion, 2x to skim long footage quickly.
- Export the video and save the re-timed MP4 to your device.
Very high speeds can drop audio clarity; keep dialogue clips at 2x or below for intelligible speech.
Related Tools
- GIF Speed Changer Change GIF animation speed online. Speed up or slow down GIF files instantly.
- Video Trimmer Free online video trimmer to cut video files by time range. Extract clips from MP4, MOV, AVI with frame-level precision. No upload, 100% browser-based processing.
- Video Loop Loop video clips multiple times online. Set custom repeat count, preview and export looped MP4 instantly in your browser.
- Extract Audio from Video Extract audio tracks from video files online. Convert video to MP3, WAV, or AAC. Free, private, no installation needed.
- Screen Recorder Free online screen recorder. Capture your screen, a window or a browser tab with optional microphone and system audio, pause and resume, then download the video - no watermark, no upload, no time limit.
- Webcam Test Free online webcam test. Check your camera works, see live resolution and frame rate, switch between cameras and take photos - everything runs locally, no video ever leaves your device.
- GIF Split Frames Extract and download individual frames from GIF animations as PNG or sprite sheet. Free online tool with preview and ZIP export.
- GIF Reverse Reverse GIF animation playback order online for free. Upload, preview and download reversed GIFs instantly.