Good to know: Free-use terms vary by tool and plan. When a card lists no tool-specific limit, check quotas, watermarks and export terms on the official page.
Shutter Encoder is a free desktop video converter by Paul Pacifico for Windows, macOS and Linux, built on FFmpeg, that converts video, audio and images, cuts clips (without re-encoding for selected codecs) and extracts or replaces audio.
Trim or Convert Videos
Good to know: Requires desktop installation.
LosslessCut is a free, open-source desktop tool for Windows, macOS and Linux that trims and cuts video and audio without re-encoding, using FFmpeg, and can also merge compatible files, extract tracks and switch the container format losslessly.
Trim or Convert Videos
Good to know: Requires desktop installation.
VLC is VideoLAN's free, open-source media player; besides playback, its desktop version can convert a file to another format through Media > Convert/Save, but the pages reviewed do not describe trimming.
Trim or Convert Videos
Good to know: Requires desktop installation.
Convert videos on your computer and balance file size against quality.
Trim or Convert Videos
Good to know: Requires desktop installation.