Speed up a video to 1.5×, 2× or as far as 4×: a faster tutorial, a time-lapse feel from a long recording, a clip that has to fit a length limit. The page opens at 2×. Every frame is kept and only the timing changes, so nothing is skipped and nothing is re-compressed: a 10-minute screen recording at 2× becomes 5 minutes at the same sharpness. Kept audio speeds up with it and sounds higher; drop it for silent fast motion. It all runs in your browser, with no upload.
How it works
- Drop the video, or up to 20 for one batch. The page starts at 2×.
- Keep 2×, pick 1.5× or 4×, or type a value such as 3, and decide whether the audio stays.
- Press Process & download to save the faster MP4, with its new, shorter duration shown.
Questions
- Does speeding up a video make the file smaller?
- Not much. Every frame is copied unchanged, so the video data is the same size and only the running time shrinks; a 2× clip is about as large as the original. If the goal is a smaller file, run the faster clip through the video compressor afterwards, which can aim at an exact size in MB.
- Will a sped-up video drop frames?
- No. No frame is skipped or blended. A 30 fps clip at 2× becomes a 60 fps clip of the same frames played twice as fast, so the motion is the original motion compressed in time. At 4×, the same clip plays at 120 fps.
- Can I speed up only part of a video?
- Not inside one clip: the speed applies to the whole file. Cut the section you want with the video trimmer first, which copies it without re-encoding where it can, then speed that piece up here. Joining it back to the rest needs a video editor.
- Does my file get uploaded?
- No. The models and all processing run inside your browser on your own device. You can verify this yourself: open your browser’s DevTools, watch the Network tab, and process a file: there are no uploads. After the first visit most tools also work fully offline.
- Does rotating re-encode the video?
- No. The rotation is written into the MP4’s orientation metadata and the frames are copied unchanged, so it is near instant and loses no quality. A few third-party players ignore that flag; browsers and phones honour it.
- What happens to the audio?
- Rotate keeps it untouched. Reverse always drops it, since reversed speech is rarely what anyone wants. Speed changes keep it in sync, or you can drop it with one switch.