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WEBM MP4
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Convert WEBM to MP4

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Verified by Adam B.· reviewed by FE Editorial ·updated Aug 5, 2026
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Is it possible to convert WEBM to MP4?
Yes - WEBM converts to MP4.

You can do it right here with our free converter - no sign-up, and your file is deleted right after.

The fastest path is FFmpeg: one command converts any WebM to a standard H.264 MP4. If you prefer a visual interface, HandBrake or VLC handle the same job without typing. Because WebM video cannot simply be copied into an MP4 container, every method re-encodes the video and loses a small but measurable amount of quality.

Also to MP4: AVCHD · USM · MXF

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert WEBM to MP4?

MP4 with H.264 is supported by virtually every phone, smart TV, video editor, and messaging app. WebM is a browser-oriented format - a file that streams fine in Chrome may be refused by an iPhone, WhatsApp, or a video editor's import dialog. Converting to .MP4 makes the file universally playable without special codec packs.

How to convert WEBM to MP4

HandBrake FREE

Open your WEBM in HandBrake, pick an MP4 preset such as Fast 1080p30, and click Start Encode.

VLC media player FREE

Go to Media > Convert/Save, add your WEBM, choose the "Video - H.264 + MP3 (MP4)" profile, and click Start.

Freemake Video Converter FREE

Add your WEBM, choose the MP4 output preset, and click Convert.

Command line - FFmpeg CLI

Run ffmpeg -i in.webm -c:v libx264 -c:a aac out.mp4 to re-encode to H.264/AAC in one step.

Programs that convert WEBM

Miro Video Converter
Free Studio
Freemake Video Converter
MediaCoder
SUPER
Miro Video Converter for Mac

About these formats

.WEBM WebM Video

A WEBM file is Google's open video container that holds VP8, VP9 or AV1 video with Vorbis or Opus audio. Drag it into any modern browser or open it in VLC - no codec pack needed. If a…

Open .WEBM details →
.MP4 MPEG-4 Part 14 Video File

An MP4 file is a video container (MPEG-4 Part 14, standardized 2003) that holds video, audio, subtitles, and chapters in one file. It plays on every phone, computer, browser, and smart TV…

Open .MP4 details →

Quality & what to watch

  • WebM video (VP8/VP9/AV1) cannot be placed directly into an MP4 container - the video is always re-encoded, so some quality is lost.
  • Audio must also be re-encoded from Vorbis or Opus to AAC; skipping this step can result in no audio on phones and TVs.
  • AV1-encoded WebM files (common in recent YouTube downloads) take noticeably longer to decode than VP9 files.

Frequently asked questions

Does converting WebM to MP4 reduce quality?
Yes, always. The video must be re-encoded from VP8/VP9/AV1 to H.264, which is a lossy process - at typical default settings the difference is small but measurable.
Can I just rename the file from .webm to .mp4?
No. Renaming does not change the container or the codec inside, so the file will be unplayable or cause errors on most devices.
How long does conversion take?
It depends on file length, resolution, and CPU speed - a 1-minute 1080p VP9 WebM typically takes 1-3 minutes on a modern desktop using FFmpeg.
What video codec does the MP4 output use?
Most tools default to H.264 (libx264), which offers the widest device compatibility. HandBrake and FFmpeg can also output H.265 for smaller files at the cost of slower encoding.