Video
Tools will load when you run.Change Video Speed≈
Speed up or slow down a video while keeping its audio synchronized and preserving pitch.
Your result.
How to use Change Video Speed
- Choose your MP4, WEBM, MKV, MOV, AVI, GIF, MPEG, MPG, M4V, OGV, TS.
- Upload a video and choose a speed from 0.25× to 4×. Browser limit: 1080p, 5 minutes, 32 MiB.
- Download a new MP4 with the selected playback speed.
Formats and requirements
- Input formats
- MP4, WEBM, MKV, MOV, AVI, GIF, MPEG, MPG, M4V, OGV, TS
- Output
- MP4
- Availability
- Free in your browser and through the CLI
- Files per operation
- 1
- Browser file limit
- 32 MiB per file, 32 MiB total
What to expect
Processes locally with FFmpeg. Browser processing uses WebAssembly and downloads the engine on first use; large videos are better suited to the CLI. Re-encoding may lose quality. GIF output has no audio. Browser limits: 1080p, 5 minutes, 32 MiB input and output.
Do my files leave my device?
No. Thanks to advanced file-processing technology, your files are processed directly on your device, inside your browser. OneKit does not receive your input files or results. Required public processing libraries may download when you first use the tool.
File privacy and local processing →