Merge Videos online — free

Why use this tool?

• Local ffmpeg.wasm
• No upload to server
• No sign-up

How it works

1. Open the Merge Videos page — no registration required.
2. Upload or drag your file into the drop zone.
3. Adjust settings and review the live preview (local ffmpeg.wasm).
4. Copy the output or download the processed file to your device.

Common use cases

• Trim or compress clips before sharing in Slack or email
• Convert a screen recording to a widely supported format
• Quick edits when you cannot install desktop video software
• Prototype a workflow before automating it elsewhere

Tips & comparisons

• Compared with desktop apps, this online merge videos starts instantly and needs no updates — bookmark it for repeat tasks.
• Cloud upload services may store copies of your files; this browser tool keeps processing local when the feature allows it.
• For batch or enterprise workflows, combine this tool with Tentaco studios or export results to your own pipeline.

Privacy & data handling

Tentaco runs this tool in your browser whenever possible. Files you select are processed in memory on your device and are not uploaded to Tentaco servers for standard modes. Close the tab or clear the page after use on shared computers. Features that call external APIs (such as URL fetchers) only send the data required for that request.