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WebM to MP4 Converter

Convert WebM to MP4 right in your browser. Drop in a WebM, MKV or MOV, optionally scale it down, and download a widely supported MP4 that plays on phones, editors and social platforms. No upload to a server, no account.

Resolution

A crisp, watermark-free video frame of a colorful hot-air balloon rising over misty forested hills at sunrise, representing a clean MP4 re-encoded from a WebM clip — Example — Illustration of a clean MP4 result — a sharp frame re-encoded from a WebM clip. A representative still, not a captured export.

Conversion runs in your browser

VidSnappy decodes your WebM and re-encodes it to MP4 locally, with nothing uploaded to a server. That keeps the file private and means the conversion starts instantly — no waiting in an upload queue, even for a long recording.

Diagram: the file is processed entirely inside the browser on your own device, with nothing sent to a server

MP4 plays almost everywhere

WebM is great for the web but many apps, phones and editors still expect MP4. VidSnappy re-encodes the video to H.264 inside an MP4 container, so the result imports cleanly into editing software and plays on devices that will not open a WebM.

Diagram: a WebM clip being re-encoded to an H.264 MP4 that plays across phones, editors and social platforms

Scale it down if you need to

Keep the original size, or cap the height at 1080p, 720p or 480p to produce a smaller MP4. It is an easy way to trim the file size of a screen recording or a downloaded clip before you share or upload it.

Illustration: a video file card connected by arrows to many device outlines (phone, laptop, tv)

From WebM to MP4, in a few steps

Add a WebM, choose a resolution and re-encode it to a widely supported MP4 you can play and edit anywhere.

Example animation composed from the steps above — an illustration of the workflow, not a captured export.

How to convert WebM to MP4

Step 01
Add your WebM
Drag a WebM, MKV or MOV onto the converter, or click to choose a file. It loads straight from your device — no upload, no account.
Step 02
Pick a resolution
Keep the original size, or scale the height down to 1080p, 720p or 480p to make a smaller MP4.
Step 03
Convert to MP4
Click Convert. VidSnappy re-encodes the video to H.264 MP4 in your browser, showing progress as it works.
Step 04
Preview and download
Play the MP4 to check it, then download the .mp4 file. Want a smaller size? Choose a lower resolution and convert again — it is free every time.

Free to use, no account needed

Convert WebM to MP4 at no cost. There is no sign-up, no hidden limit and nothing to install — open VidSnappy in your browser, add your file and export. It works on desktop and on modern mobile browsers.

No upload, no queue

There is no file to upload and no server queue to wait in. VidSnappy re-encodes the video on your own device the moment you add it, so the conversion is limited only by your machine — not by a shared server under load.

Private by design

Because the conversion runs entirely in your browser, your video is never sent to a server. That keeps screen recordings, downloads and work footage private while you turn a WebM into an MP4 you can use anywhere.

Broad compatibility

The output is a standard H.264 MP4 — the format phones, editing apps, presentation software and social platforms accept without complaint. It is the safe choice when something refuses to open your WebM.

Why convert WebM to MP4

WebM often comes out of browser recorders, screen-capture tools and some downloads. It is efficient on the web, but plenty of programs — video editors, older devices, certain upload forms — only take MP4.

Re-encoding to MP4 gives you a file that just works across those places, and capping the resolution keeps the size reasonable when you need to email or upload it.

Choose a file