WebM to MP4 Converter — Free Online

Q: How do I convert WebM to MP4 for free?

Upload your WebM file using the drag and drop area above, click "Convert to MP4", and download the result when it's ready. No software to install, no account required for files up to 1GB.

Q: Why won't my WebM file play on my iPhone or TV?

WebM is only natively supported in desktop browsers like Chrome and Firefox. iPhones, Android devices, Windows Media Player, and most smart TVs don't support WebM at all. Converting to MP4 fixes this instantly — MP4 plays everywhere without any extra apps.

Q: How do I open a WebM file on Windows or Mac?

The easiest way is to convert it to MP4, which opens in any media player on Windows or Mac. Alternatively, you can install VLC media player, which supports WebM. But if you need the file to share or upload, converting to MP4 is the better option.

Q: Can I convert WebM to MP4 on a Mac?

Yes. Our converter is entirely browser-based, so it works on Mac, Windows, iPhone, Android, and iPad — no downloads or app installations needed.

Q: Will the video quality be affected by the conversion?

No. We use high-quality H.264 encoding that matches the visual quality of your source WebM file. The file size may change slightly due to the different codec, but the picture quality stays the same.

Q: What is the maximum file size I can convert?

You can convert files up to 1GB without an account. Enter your email to unlock up to 2GB, or sign up for a free vitelnk trial to convert files up to 5GB.

Q: Is this better than using CloudConvert or HandBrake?

For most users, yes. CloudConvert limits free conversions and requires an account for larger files. HandBrake is powerful but requires a desktop download and setup. vitelnk is free up to 1GB with no account, no installation, and results in under a minute.

Convert WebM files to MP4 instantly — plays on iPhone, Windows, Mac, and every social platform.

Max 1GB

3 conversions/day

3GB bandwidth/day

Start 14-day free trial for 5GB uploads

Works on Mac, Windows, Linux, iPhone, and Android — no download or install required.

Up to 1GB · 2GB with email

3 conversions/day

Free — no signup

Drag a WebM file here or click to select

File should not exceed 1GB

How to Use This Tool

Drag and drop your WebM file onto the upload area, or click to browse your files

Click "Convert to MP4" to start the conversion

Wait a few seconds while our servers process the file

Click "Download" to save your converted MP4

What is WebM?

WebM is an open-source video format created by Google in 2010, designed specifically for streaming on the web. It uses VP8 or VP9 video encoding and is commonly produced by screen recorders, browser capture tools, and video downloaders. The problem: while Chrome and Firefox play WebM natively, it is not supported by iPhone, Windows Media Player, most smart TVs, or social media upload tools — so the file simply won't open or play outside a desktop browser.

What is MP4?

MP4 (MPEG-4 Part 14) is the most universally supported video format in the world. It uses H.264 video and AAC audio, and plays on every modern device without extra software — iPhone, Android, Windows, Mac, smart TVs, gaming consoles, and all major social platforms. When you need a video to work anywhere without compatibility issues, MP4 is always the right choice.

See It In Action

Why Convert WebM to MP4?

WebM files work inside Chrome and Firefox but fail almost everywhere else — iPhone won't open them, Windows Media Player doesn't recognise the format, most smart TVs skip right past them, and social platforms like Instagram and TikTok reject them on upload. If you've downloaded a video, captured a screen recording, or received a WebM file you can't play, converting to MP4 fixes every one of those problems in seconds. Our converter uses FFmpeg with H.264 encoding to produce an MP4 that plays on any device without losing visual quality. No account needed for files up to 1GB — just upload, convert, and download.

Key Features

Works on Mac, Windows & iPhone

Upload from any device — the converter runs entirely in your browser, no software to install

No Account for Files up to 1GB

Start converting immediately without creating an account or entering an email

No Quality Loss

H.264 encoding preserves the visual quality of your source WebM — you won't see a difference

Universal MP4 Output

Output plays on iPhone, Android, Windows, Mac, smart TVs, and every major social platform

Secure & Private

Files are transferred over SSL and automatically deleted from our servers after download

No Watermarks

Your converted file is completely clean — no branding, logos, or watermarks added

Perfect For

Mobile Devices

Screen Recordings

Social Media Uploads

Video Editing Software

Messaging Apps

Smart TVs

Downloaded Videos

Browser Captures

Free Usage Limits

Free (No Account)

1GB

max file size

conversions per day

3GB

bandwidth per day

14-Day Free Trial

5GB

max file size

conversions per day

25GB

bandwidth per day

Start 14 Day Free Trial

14-day trial · cancel anytime

Frequently Asked Questions

How do I convert WebM to MP4 for free?

Why won't my WebM file play on my iPhone or TV?

How do I open a WebM file on Windows or Mac?

Can I convert WebM to MP4 on a Mac?

Will the video quality be affected by the conversion?

What is the maximum file size I can convert?

Is this better than using CloudConvert or HandBrake?

Does this work on Mac, Windows, iPhone, and Android?

Take Your Videos Further

Need more than just conversion? With vitelnk, you can embed your processed video on any website, add password protection, expiring links, viewer registration, and analytics.

Password Protection

Expiring Links

Viewer Registration

Video Analytics

Custom Branding

Try vitelnk Free

14-day free trial · cancel anytime.

Privacy & Security

Your files are processed securely with SSL encryption and automatically deleted after download. We never store or share your files. All processing happens on our secure servers.