Create slow-motion or timelapse effects by adjusting playback speed from 0.25x to 4x. Audio pitch is automatically adjusted. Processed locally in your browser.
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or browse your files
MP4, MOV, AVI, MKV, WebM · Max 100 MB
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Speeding up or slowing down footage is essential for tutorials, timelapses, dramatic slow-motion effects, and fitting long recordings into shorter clips. A 2x speed-up cuts a 10-minute screencast in half without losing information, while 0.25x slow motion reveals details invisible to the naked eye — perfect for sports analysis, wildlife footage, or product demos.
Creating timelapse videos from long security or dashcam recordings. Speeding up coding tutorials or cooking walkthroughs so viewers stay engaged. Adding cinematic slow-motion to action shots or drone footage. Syncing video duration to a specific audio track or presentation length. Previewing edits faster during video production workflows.
Our tool re-encodes your video at the chosen speed using FFmpeg compiled to WebAssembly — everything runs in your browser with no server upload. Audio pitch is preserved during moderate speed changes (0.5x–2x) to keep dialogue intelligible. Supports MP4, MOV, WebM, and MKV inputs. Output is always MP4 (H.264) for maximum compatibility. Processing time depends on file size and your device's CPU — a 100 MB clip typically completes in under 30 seconds on modern hardware.
Drag and drop or browse to select a video file (MP4, MOV, AVI, MKV, WebM).
Pick a preset (0.25x to 4x) or use the slider for a custom speed. Toggle audio on or off.
Click the process button. Download the result or send it to another tool.
Use 0.5x for smooth slow-motion replays. For dramatic slow-mo, try 0.25x on high-framerate footage.
Speed up long recordings at 2x–4x to create engaging timelapse content. Remove audio for a polished result.
Pro tipYour video never leaves your browser. FFmpeg runs as WebAssembly directly on your device.
No server upload, no storage, no tracking. Close the tab and everything is gone.
PrivacyEverything you need to know about changing video speed