How to use the MP4 Converter tool
- Drop a video (MOV, WebM, MKV, AVI, WMV and more) into the box above.
- Choose quality and resolution. Leave Fast mode on to keep the original picture when possible.
- Click Convert to MP4 and watch the progress bar.
- Preview the result and download your MP4.
Why MP4?
MP4 with H.264 video is the most widely supported video format in the world: it plays on iPhone and Android, Windows and Mac, in every browser, and on WhatsApp, Instagram, YouTube and email. Converting to MP4 is the easiest way to make a video “just work”.
When a video already uses H.264 inside another container (common with MOV and MKV), Fast mode simply re-packages it, which takes seconds and keeps the exact original quality. Otherwise the video is re-encoded on your device.
Private and free
Unlike most online converters, your video is never uploaded. The conversion engine (FFmpeg, compiled to WebAssembly) runs inside your browser. It downloads once (about 31 MB) and is then reused.
Why use Everytoool's MP4 Converter?
Our free MP4 Converter tool helps with phone recordings, screen captures and clips in just a few clicks. Convert MOV, WebM, MKV, AVI, WMV and other videos to MP4 — right in your browser, no upload. It is handy for content creators, teachers and anyone sharing clips.
Privacy is built in: the work happens on your own device, so nothing is sent over the internet or stored anywhere. When you close the page, it is gone.
Tips for the best results
- MP4 plays on almost every phone, computer and social network.
- Shorter clips convert much faster, especially on phones.
- Lower the resolution to 720p to make a video small enough for messaging apps.
You may also find these free tools useful: MOV to MP4, Video to GIF, Video Converter.
More questions about MP4 Converter
Is MP4 Converter free to use?
Yes. MP4 Converter is completely free with no sign-up, no watermark and no daily limit.
Does MP4 Converter work on my phone?
Yes. It works in any modern browser on iPhone, Android, Windows, Mac and Linux — nothing to install.
Are my files uploaded anywhere?
No. Everything is processed on your device inside the browser, so it stays private.
Frequently asked questions
Is my video uploaded?
No. The conversion runs entirely in your browser using WebAssembly. Your video never leaves your device.
How big can the video be?
Up to about 1.9 GB, but long videos are slow to re-encode in a browser, especially on phones. Fast mode is almost instant when it applies.
Why does the first conversion take longer?
The video engine (~31 MB) downloads the first time you use a video or audio tool. After that it is cached.
Is the MP4 Converter tool really free?
Yes — completely free, forever. There is no sign-up, no payment, no watermark and no daily limit.