ALTools

Merge Videos

Merge multiple videos (including TS segments) into one MP4 in the order you select.

How to use this tool — step-by-step guide

How Video Merging Works

Add multiple video files—MP4, MOV, WebM, TS, and other common formats. Drag to reorder the sequence. ALTools merges on your device with no upload and no sign-up.

Clips with matching codecs are joined with fast concatenation. When codecs or settings differ, the tool re-encodes so playback stays smooth in one MP4 output.

Combine episode parts, stitch event footage, merge screen recordings with B-roll, or build a single reel from several takes.

Local merging keeps long or personal projects private and avoids cloud queues. Fast concat finishes quickly when clips already match; mixed sources may take longer but still never leave your machine.

Download one merged MP4 in playlist order, ready to upload, edit further, or share.

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Remove multiple sections from a video and export the remaining parts as one file.

Frequently Asked Questions

Can I merge TS files?

Yes. You can select multiple .ts segments and merge them into one MP4 output.

Does file order matter?

Yes. Files are merged in list order. Drag items to reorder before exporting.

What if clips have different sizes or codecs?

Matching resolution and codec may concatenate without re-encoding. Mixed sizes or codecs (e.g. AV1/HEVC) are normalized to a single H.264 MP4 — longer exports are normal.

Are files uploaded?

No. Merging runs entirely in your browser.