To make an MP4 video loop online, open LoopVideo, drop the file in, trim the section you want repeated, type the total length in minutes and seconds, and export. The result is a normal MP4 that already contains the repeats, so it loops in any player, on any site and on social platforms — no player setting required and no watermark added.
Make the MP4 loop in five steps
- Open the tool in desktop Chrome or Edge and drag your MP4 onto the upload area.
- Set the in and out points on the timeline, or type exact times, to choose the segment that repeats.
- Enter the finished runtime with the Minutes and Seconds fields — for example 3 minutes 30 seconds.
- Pick resolution (Source, 1080p, 1440p or 4K) and a bitrate preset. Keep the clip audio, upload your own track, or mute.
- Export and save the MP4. On Chrome and Edge you can write straight to disk, which matters for long or 4K loops.
What most online loopers cost you
- Upload time: sending a 500 MB MP4 to a server before anything happens, then waiting in a queue.
- File size caps: free tiers usually stop somewhere around 100-200 MB.
- Watermarks: a logo burned into the export unless you pay.
- Re-compression: many services transcode down to 720p or a low bitrate, which shows immediately on motion.
- Privacy: your footage sits on someone else's server.
LoopVideo runs entirely in the browser. Reading the file, trimming, looping and H.264 encoding all happen on your own machine, so there is no upload, no queue, no server-side size limit and nothing to strip off the finished file.
Settings that keep the MP4 looking right
- Resolution: Source keeps the original frame size and aspect ratio, including vertical clips. Forcing 4K only helps if the source resolves that detail.
- Bitrate: High or Very High for motion-heavy footage; lower presets are fine for calm scenes and keep the file smaller.
- Frame rate: the export is constant frame rate so the joins do not stutter.
- Duration: whole multiples of the trim length end on a clean repeat, but any target works — the final pass is cut on the exact frame.
Open LoopVideo to trim your clip, set an exact loop length in minutes and seconds, and export a high-bitrate MP4 up to 4K — in your browser, with no upload and no watermark.
Frequently asked questions
- How do I make an MP4 video loop?
- Trim the clip to the section you want repeated, set the total duration you want the finished file to run, then export. The exported MP4 contains the repeats, so it loops wherever it is played.
- Can I loop an MP4 online without uploading it?
- Yes. LoopVideo processes the file in your browser, so the MP4 never leaves your device and there is no upload wait or file size cap.
- Is there a watermark on the exported loop?
- No. The export is a clean MP4 with no logo or overlay.
- What is the largest MP4 I can loop?
- There is no server-side limit. The practical ceiling is your machine's memory, and saving directly to disk on Chrome or Edge keeps long 4K exports comfortable.
- Which browsers work?
- Desktop Chrome and Edge are the most reliable because they include hardware H.264 encoding. The tool checks support before exporting and tells you if a resolution is unavailable.