● Runs in your browser · nothing uploaded Open havenConverter →
Merge video clips — privately, in your browser
Most “merge online” sites upload your footage to a server. havenConverter joins clips in the tab instead: either a straight concatenation or a proper cut on the multi-track timeline with transitions. Nothing is uploaded: the file is read from your disk, processed in the browser tab and saved back to your device.
Fast: concatenate
Drop several clips and choose merge. Clips with matching resolution and codec are joined on the hardware path; mismatched clips are normalised via the CPU engine.
Better: the timeline
- Open the Timeline editor and add the clips — they land in order on V1.
- Drag to reorder, trim edges, split at the playhead (S).
- Select a clip and set “Transition in” to cross-dissolve or dip-to-black.
- Add a title, set the export aspect and resolution, export.
Frequently asked questions
- Do the clips need the same resolution?
- No. On the timeline every clip is fitted into the output frame; for plain concatenation mismatched clips are re-encoded to match.
- Is there a clip limit?
- No fixed limit; memory is the only constraint, and decoders are opened one per clip.
Tools used in this guide
Merge & join videosStitch clips end-to-end, locally.Edit video on a timeline — in your browserA multi-track editor with zero upload.
More guides
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Updated 2026-09-06