Home / Video Converter

Video Converter

Convert between MP4 and WebM.

First use downloads a ~25MB video engine to your browser (one-time, cached after). Full re-encoding takes real time, roughly proportional to the video's length.
Drop a video file here
MP4, WebM, MOV, AVI, MPEG, MKV · stays on your device
Loading video engine…
video ready Download

Converting video between MP4 and WebM covers the two formats most platforms actually need — MP4 for broad compatibility, WebM for smaller web-optimized files — with a real video-processing engine running in your browser.

ভিডিও ফরম্যাট পরিবর্তন করতে চান? MP4 বা WebM-এ সহজেই কনভার্ট করুন — সম্পূর্ণ বিনামূল্যে, সরাসরি আপনার ব্রাউজারে।

How it works

  1. Add your videoDrop in MP4, WebM, MOV, or AVI.
  2. Pick a formatMP4 for compatibility, WebM for smaller web-friendly files.
  3. Download the resultA real video engine runs the conversion right in your browser.

Good to know

  • Also accepts MPEG and MKV as input, on top of MP4/WebM/MOV/AVI
  • Both video and audio are fully re-encoded for each target format — MP4 gets AAC audio, WebM gets Vorbis
  • If your file is already in the format you picked, you'll get a heads-up before running a pointless re-encode
  • First use downloads a real video engine (~25MB), cached after that first load

FAQ

Which format should I choose?

MP4 is the most widely compatible choice. WebM produces smaller files and is ideal for web use.

Is there a file size limit?

No hard limit, but larger videos take longer and use more of your device’s memory.

Does this work on Mac, Windows, or my phone?

Yes — it runs in any modern browser on Mac, Windows, Chromebook, iPhone, or Android. No app or software to install.