Join.mp4 Instant

Allows you to drag-and-drop videos, rearrange them, and add more clips, then export the final file.

A free, open-source tool for Windows and Mac, found at mp4joiner.org . It joins files without re-encoding, preserving original quality and working quickly. Join.mp4

A popular online merger that allows you to drag-and-drop clips and add crossfade transitions. Allows you to drag-and-drop videos, rearrange them, and

Offers a free online tool to upload, arrange, and merge videos, which you can then trim. Allows you to drag-and-drop videos

A highly recommended tool, often preferred on Reddit forums for merging without quality loss. Online Tools (No Installation)