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يدعم: .mp4, .webm, .mov (الحد الأقصى 50.0 MB)
Change Video Speed Online - Free Speed Up/Slow Down Tool
Speed up or slow down video playback with FileMuncher's free video speed changer. Create time-lapse effects by speeding up footage, add dramatic slow-motion to action clips, or adjust the pace of tutorials and presentations. Supports a range of speed multipliers from slow motion to fast forward.
Speed adjustment runs entirely in your browser using FFmpeg WebAssembly. Your video files stay completely private and are never uploaded to any server. This is important for editing personal recordings, work-related content, or any footage you want to keep confidential.
Choose from preset speed options or enter a custom multiplier. The tool adjusts both video and audio speed together so they stay in sync. For high speed-ups, audio pitch is adjusted to remain natural. Preview the speed change before processing. Supports MP4, WebM, and other common formats. Best performance on desktop browsers.
How to Change Video Speed
Upload Video
Add the video to adjust speed
Set Speed
Choose your desired playback speed
Process
Click Apply to change the speed
Download
Save the speed-adjusted video
الأسئلة الشائعة
What speed range is available?
You can slow down video to 0.25x speed for slow motion, or speed up to 4x or more for time-lapse effects. Common options include 0.5x, 1.5x, 2x, and 3x.
Is the audio adjusted too?
Yes. Audio speed is adjusted together with the video to stay in sync. At moderate speed changes, the audio remains understandable. At extreme speeds, audio pitch may shift noticeably.
Will changing speed affect video quality?
The video is re-encoded with quality settings that match the original. Slowing down does not create new frames (it duplicates existing ones), while speeding up drops frames. Visual quality per frame remains high.
What video formats are supported?
MP4, WebM, MOV, AVI, and other common formats are supported. Output is typically MP4 for universal compatibility.
Is my video uploaded to a server?
No. All processing happens in your browser. Your video never leaves your device.