Create slow-motion or timelapse effects by adjusting playback speed from 0.25x to 4x. Voices keep their natural pitch. Processed locally in your browser.
Drag & drop a video here
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MP4, MOV, AVI, MKV, WebM · Max 100 MB per file
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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. The audio pitch is preserved at every speed to keep dialogue intelligible. Supports MP4, MOV, WebM, MKV and AVI inputs. Output is always MP4 (H.264) for maximum compatibility. Processing time depends on the video's length and resolution and on your device's CPU — about the length of the result for a 720p video on a recent computer.
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