Make a Video Loop Seamlessly
Hide the jump between the last and first frame with an adjustable crossfade — processed in your browser.
Turn a hard restart into a smooth video loop
A normal repeat jumps straight from the final frame to the first. This tool moves the cut to the middle of the clip—where adjacent frames already flow naturally— and blends the original ending into the original beginning. The resulting MP4 is about the same length as the source and can be repeated by a player without a visible hard cut.
Enter the source's exact duration in seconds. For a 2-second clip, choose
duration = 2 and crossfade = 0.25. The output begins around the one-second
mark, dissolves the old ending into the old beginning near its middle, and ends
back around the one-second mark.
Short fades keep motion crisp; longer fades hide a larger mismatch but can show double images. A useful starting point is 5–15% of the clip duration. Steady shots of water, clouds, particles, abstract motion, or a fixed camera usually loop most convincingly.
Controls and limits
- Input videos are limited to 25 MiB and 0.5–600 seconds.
- Crossfades can be 0.05–10 seconds and must be shorter than half the clip.
- Output is H.264 MP4 and is re-encoded; High, Balanced, and Small trade file size against compression quality.
- Remove audio works with every clip. Crossfade audio requires an actual audio stream and blends it across the same seam.
- The page processes locally. Large, high-resolution clips need more memory and can be slow on phones.
Why do I need to enter the clip duration?
The filter must know where the midpoint and overlap fall before processing starts. Enter the media duration shown by your player or file inspector. A wrong value can cut the clip early or leave the transition in the wrong place.
Will every clip become perfectly invisible?
No crossfade can fully reconcile unrelated frames. Results are strongest when the camera is fixed and the motion or lighting near the beginning and ending is similar. If you see ghosting, shorten the fade or trim the source first.
What happens to the audio?
Audio is removed by default so silent videos always work. Choose Crossfade only when the source has an audio track; it rotates and blends the audio at the same point as the picture. Spoken words or strong beats can still reveal the edit, so a muted or ambient soundtrack is often best.
Does this make a longer repeated file?
No. It creates one loopable cycle at roughly the source duration. Use the result in a player with looping enabled, as a background video, or pass it to a separate repeat/extend tool when you need a longer physical file.
Developer & Automation Access
Run it from the terminal
Same engine as this page, headless — via the gizza CLI:
gizza tool seamless-loop-video 'url=https://example.com/input' 'duration=2' 'crossfade=1' 'audio=remove' 'quality=balanced'New to the CLI? Get gizza →
Open it by URL
Pre-fill and auto-run this tool with query parameters — the names match the API/CLI:
https://gizza.ai/tools/seamless-loop-video/?url=https://example.com/input&duration=2&crossfade=1&audio=remove&quality=balancedMachine-readable descriptor: tool.json — title + parameters JSON Schema for agents.