Convert video to MP4

Turns WEBM, MOV, MKV, AVI and other formats into an MP4 with H.264 video and AAC audio — the combination that plays on essentially every phone, TV, browser and editor.

This tool runs entirely in your browser — nothing you type or open here is ever uploaded. You can disconnect from the internet after the page loads and it still works.

Drop files here or click to choose

One video file — WEBM, MOV, MKV, AVI, FLV, WMV

up to 400 MB

Video work happens on your own processor, so it is slower here than in a native app — expect roughly real time, and the engine downloads once per visit (about 31 MB). Nothing is uploaded, which is the trade.

Need more than this page can do?

The PDF Toolbox desktop app compresses, redacts with verified removal, OCRs scans, repairs damaged files, converts to PDF/A and handles 500-page documents — all offline, on your machine, with the same promise: nothing ever leaves it. See everything it does →

Convert video to MP4

Drop files here or click to choose

Need more than this page can do?

More video & audio tools

🎚️ Audio converter

🎬 Compress video

✂️ Trim video

🎵 Video to MP3

🎞️ Video to GIF

🔇 Mute video