# WebM to MP4 Converter

Convert WebM video files to MP4 format

> Canonical page: https://elysiatools.com/en/tools/webm-to-mp4

- **Category:** Media

- **Keywords:** webm, mp4, convert, video, format, ffmpeg, vp8, vp9, h264, opus, vorbis

## Overview

Convert WebM videos to MP4 format for maximum compatibility. WebM is optimized for web streaming, while MP4 works universally across all devices, platforms, and media players.

## Inputs

- **WebM Video File** (file): Select WebM video to convert
- **Video Codec** (select)
- **Audio Codec** (select)
- **CRF Quality (18-28, lower is better)** (number): Only applies when re-encoding. 18-28 is recommended range

## When to use

- When you have a WebM screen recording or web video that needs to be played on devices that do not natively support WebM, such as iPhones or iPads.
- When you want to import WebM footage into video editing software that only accepts MP4 containers.
- When you need to share a video file via email or messaging platforms that require the highly compatible H.264/AAC MP4 format.

## How it works

- Upload your WebM video file (up to 100MB) into the converter.
- Select your preferred video and audio codecs, such as H.264 and AAC, or choose 'Copy' to bypass re-encoding.
- Optionally set a CRF quality value between 18 and 28 to control the output file compression.
- Click convert to process the file and download your new MP4 video.

## Use cases

- Converting WebM screen recordings from web browsers into MP4 for presentation slides.
- Preparing web-optimized WebM animations for offline playback on legacy media players.
- Transcoding WebM video clips with Opus audio into MP4 with AAC audio for social media uploads.

## Frequently asked questions

### Can I convert WebM to MP4 without re-encoding the video stream?

Yes, select 'Copy (No Re-encoding)' for the video codec option to preserve the original video stream.

### What is the maximum file size supported by this converter?

The converter supports WebM video files up to 100MB in size.

### Which video codec should I choose for maximum compatibility?

We recommend choosing H.264 (libx264) for the video codec and AAC for the audio codec for universal compatibility.

### What does the CRF quality setting do?

Constant Rate Factor (CRF) controls the video quality and compression level. Lower values (like 18) yield higher quality but larger files, while higher values (like 28) yield lower quality and smaller files.

### Will this tool work on mobile devices?

Yes, you can upload WebM files directly from your mobile browser and download the converted MP4 file.

## Related tools

- [MP4 to WebM Converter](https://elysiatools.com/en/tools/mp4-to-webm): Convert MP4 video files to WebM format
- [Video to Opus Converter](https://elysiatools.com/en/tools/video-to-opus): Extract audio from video and convert to Opus format
- [Batch Video Converter](https://elysiatools.com/en/tools/video-batch-converter): Convert multiple video files between different formats like MP4, WebM, MKV, AVI, MOV with quality settings and batch processing
- [Video to AAC Converter](https://elysiatools.com/en/tools/video-to-aac): Extract audio from video and convert to AAC format
- [Video to FLAC Converter](https://elysiatools.com/en/tools/video-to-flac): Extract audio from video and convert to FLAC (lossless) format
- [Convert GIF to WebM](https://elysiatools.com/en/tools/gif-to-webm): Convert GIF images to WebM video format with modern compression and web optimization
- [Video to MP3 Converter](https://elysiatools.com/en/tools/video-to-mp3): Extract audio from video and convert to MP3 with bitrate, resampling, and channel options
- [Video to WAV Converter](https://elysiatools.com/en/tools/video-to-wav): Extract audio from video and convert to WAV (PCM) with optional resampling and channel selection

## Samples

- [Video H.264 Samples](https://elysiatools.com/en/samples/video-h264-samples): Sample video files encoded in H.264 (AVC) format
- [Video AV1 Samples](https://elysiatools.com/en/samples/video-av1-samples): Sample video files encoded in AV1 format
- [Video H.265 Samples](https://elysiatools.com/en/samples/video-h265-samples): Sample video files encoded in H.265 (HEVC) format
- [Video VP9 Samples](https://elysiatools.com/en/samples/video-vp9-samples): Sample video files encoded in VP9 format