Convert WebM to MP4 Free

Convert a WebM file to a web-ready MP4 that plays on any device. Free, no account, no watermark, and no time limit. Drop your WebM and get a widely compatible MP4 back in seconds.

WebM MP4 MOV MKV

Files up to 2GB · Output: MP4 (H.264, AAC)

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Click to upload or drag & drop

WebM · MP4 · MOV · MKV · Up to 2GB

No sign up needed. Just drop your video.

Processing time depends on file size and your upload speed.

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No account required

Just upload and go. Nothing to sign up for, no email, no credit card.

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No watermark, ever

Your MP4 comes back clean. No branding added.

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Files deleted in 15 minutes

Your video does not live on our servers. Privacy by default.

How It Works

1

Upload your WebM

A WebM file up to 2GB. Drag and drop or click to browse. MP4, MOV, and MKV are accepted too.

2

VidClean converts it to MP4

WebM stores video with VP8 or VP9, which an MP4 container cannot hold, so the video is re-encoded to H.264. The result is a widely compatible MP4, not a lossless copy.

3

Download the MP4

Ready in seconds and plays on any device, browser, or editor. If the MP4 is larger than you need, compress the video to shrink it before uploading.

Who uses this

Anyone with a WebM file that will not play in a video editor, on a phone, or on a platform that expects MP4. Screen recorders, browser-based capture tools, and OBS often export WebM, and many apps simply cannot open it. Converting to a widely compatible MP4 makes the clip work everywhere. If you only need the audio track, extract audio from the file instead.

Drop your WebM, get an MP4 back. No editor required.

Frequently Asked Questions

Everything you need to know about converting WebM to MP4.

Will the quality change when I convert WebM to MP4? expand_more

WebM stores video with VP8 or VP9, which an MP4 container cannot hold, so the file is re-encoded to H.264. This is not a lossless copy, but VidClean uses a quality-targeted encoder so the result is a widely compatible MP4 that looks clean on typical content like talking heads, screen recordings, and tutorials.

What formats can I upload, and what do I get back? expand_more

You can upload WebM, MP4, MOV, or MKV. The output is always an MP4 (H.264 video, AAC audio) for broad compatibility across phones, browsers, editors, and social platforms.

How large can my WebM file be? expand_more

Files up to 2GB are supported. That covers long screen recordings and high-resolution clips without forcing you to split the file first.

Is my file kept private? expand_more

Yes. Files are processed on a private server and automatically deleted 15 minutes after the job finishes. We never view, share, or store your content.

Is it free, or is there a paid plan? expand_more

Completely free. No account, no signup, no watermark, and no paid tier. There is no time limit and files up to 2GB are accepted.

How long does the conversion take? expand_more

Roughly real-time on the input duration. A one-minute clip typically finishes in under a minute. A five-minute clip takes a few minutes. Larger files and higher resolutions take proportionally longer.

Also try: Compress Video at vidclean.net/compress-video

Last updated: June 2, 2026