Video Merger

About the Video Merger

Video Merger stitches two or more video files into a single continuous clip — no re-uploading, no waiting in a queue, no losing quality to a cloud transcode. Drop the videos in the order you want, pick an output format, and download the combined result in one go.

Everything happens inside your browser using the Mediabunny library. Your videos are never uploaded, never queued on a server, and never logged. Close the tab and they're gone — safe for client cuts, unreleased footage, personal recordings, or anything else you'd rather not hand to a third party.

What you can control

• Multi-format input: MP4, WebM, MOV, MKV — drop them in any combination and the merger handles them in one pass.
• Drag & drop or click to upload: Add as many videos as you need; reorder them in the list to set the playback sequence.
• Output format: MP4 (recommended for maximum compatibility) or WebM (smaller file size, great for web embeds).
• MP4 Fast Start: Moves the moov atom to the front of the file so the video starts playing while it's still loading — essential for web streaming.
• Live progress bar: Watch the merge progress in real time during processing.
• Built-in preview: Play the merged result inside the tool before downloading.
• One-click download: Save the merged file directly to your device.

Common uses

• Joining vlog or podcast video segments into a single episode.
• Stitching together GoPro, drone, or dashcam clips that were auto-split during recording.
• Combining screen recordings for tutorials or product walkthroughs.
• Building highlight reels, recap videos, or event compilations.
• Concatenating multiple takes of a single shot into one delivery file.
• Assembling social media stories or reels from separate clips.

Tips for the best results

• For smoothest playback, merge videos that share the same resolution, frame rate, and codec. Mismatched sources still work but render slower.
• Pick MP4 for distribution (YouTube, social media, email, mobile playback) and WebM when target audience is browsers only and file size matters.
• Leave MP4 Fast Start on for any video that will play in a browser — the difference between "instant play" and "wait for download" is whether this is enabled.
• Drag the videos in the list to reorder them. The merger respects the order you set.
• Trim videos with Video Slicer first if you only need parts of them — merging shorter clips is faster and uses less memory.
• If you're combining videos from different cameras, check each clip's orientation and aspect ratio first to avoid awkward letterboxing.

No accounts, no upload queue, no length limits — drop your videos, set the order, and merge. The final file is yours to share, edit further, or upload anywhere.

Common questions

How do I combine multiple videos into one?

Add the clips, arrange them in order, and download the merged file. The three phone clips from the recital become one video the grandparents can actually follow.

Will the merged video have a watermark?

No. Cloud editors stamp free merges because the merge ran on their servers; this one runs on your machine, so the output is clean.

Is there a limit on clips or length?

No artificial one: your device's memory is the ceiling, which comfortably handles everyday merging jobs.

Do the clips need to be the same format?

Same-format clips merge most cleanly. If yours differ, convert them to a common format first and the merge goes smoothly.

Are my videos uploaded during merging?

No, everything processes in your browser, so home videos never visit a server on the way to becoming one file.

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