Open MP4 files online
Play video files directly. MP4 and WebM play natively; ffmpeg.wasm can transcode less common codecs in the browser.
Drop a MP4 file to open it
or click to choose — everything stays on your device
Choose file🔒 100% private — files never leave your browser
Or turn MP4 into an image — snapshot the preview, add arrows or notes, and download a PNG.
What is a MP4 file?
Play video files directly. MP4 and WebM play natively; ffmpeg.wasm can transcode less common codecs in the browser. The .MP4 extension identifies a Digital video file, which is served with the video/mp4 media type. You can open it here instantly — drop the file into the box above and it renders in your browser. Nothing is uploaded.
Besides this free online viewer, you can open Video files in desktop apps such as VLC, web browsers, QuickTime — but here all you need is a web browser.
Quick facts
| Format | Video — Digital video |
|---|---|
| File extensions | .mp4 .webm .mkv .mov |
| MIME type | video/mp4 |
| Developer | MPEG / various |
| Category | Audio & video |
| Also opens in | VLC, web browsers, QuickTime |
How to open a MP4 file online
- Click Choose file above, or drag your MP4 file onto the box.
- The right viewer loads automatically and renders your file.
- Read, scroll or page through it. To open a different file, choose Open another file.
100% private — files never leave your browser.
Libraries used to render MP4 in the browser
This viewer is built entirely with open-source JavaScript that runs in your browser:
Frequently asked questions
What is a .MP4 file?
A .MP4 file is a Digital video, identified by the video/mp4 media type. You can open and read it instantly in the viewer above without installing anything.
What programs open MP4 files?
On the desktop, MP4 files typically open in VLC, web browsers, QuickTime. Online, this page opens them in any modern browser — nothing to download.
How do I convert MP4 to an image?
Use Snapshot to capture the MP4 preview, optionally add arrows, text or highlights, then download it as a PNG image.
Is it safe to open my MP4 file here?
Yes. The file is read and rendered entirely by JavaScript inside your own browser. It is never uploaded to a server, so nothing leaves your device.
Do I need to install anything to view a MP4 file?
No. There is nothing to install and no account to create. Open the page, drop your file, and it displays instantly.
Does it work on my phone or iPad?
Yes. The viewer is fully responsive and works in modern mobile and tablet browsers such as Safari and Chrome.
Is there a file size limit?
There is no hard limit, but very large files depend on your device’s memory. Big files are processed in the background so the page stays responsive.