Free WebM to MP4
Converter Online
Convert WebM to MP4 online free. Turn Chrome downloads and YouTube WebM videos to MP4 for playback on any device — no upload, 100% private, works in your browser.
Upload Your Video
Drag and drop or click to browse
or drag & drop video files here
Supports MP4, WebM, MOV, AVI
Video Conversions
Countries Served
Browser Privacy
Forever Free
100% Private WebM to MP4 Conversion
Convert WebM to MP4 entirely in your browser using FFmpeg.wasm. Your video files are never uploaded to any server — complete privacy for downloaded videos, screen recordings, and personal content.
Fast Browser-based Conversion
No upload queues, no waiting for server processing. Convert WebM to MP4 directly in your browser. Works on Mac, Windows, iPhone, and Android without installing any software.
Universal MP4 Device Compatibility
WebM only plays in browsers. MP4 plays everywhere — iPhone, Android, Smart TV, media players, and every social platform. Convert your WebM files to MP4 for true cross-device compatibility.
Handles VP8, VP9 & AV1 WebM Files
Our WebM to MP4 converter supports all WebM video codecs — VP8, VP9, and AV1 — and re-encodes them to the widely compatible H.264 codec in an MP4 container for maximum device support.
How to Convert WebM to MP4 Online Free
Convert your WebM video to MP4 in 3 simple steps
Upload Your WebM File
Select your WebM file from your computer or phone. Our free online WebM to MP4 converter handles files from Chrome downloads, YouTube, screen recordings, and any other WebM source.
Select MP4 as Output
MP4 is automatically selected as the output format. The converter will re-encode the WebM video to H.264 MP4, ensuring compatibility with all devices and platforms.
Convert WebM to MP4 & Download
Click convert and download your MP4 instantly. The entire WebM to MP4 conversion runs in your browser — completely free, no upload, 100% private.
Best Free WebM to MP4 Converter Online
Unlike other online converters that upload your WebM files to remote servers, our WebM to MP4 converter processes everything locally in your browser with FFmpeg.wasm. Get complete privacy, no file size limits, and no registration required.
WebM files stay on your device — no server exposure, no waiting.
Convert WebM on any device — Mac, Windows, iPhone, Android.
| Feature | Our Tool | Others |
|---|---|---|
| 100% Browser-based (No Upload) | ||
| Fast WebM to MP4 Conversion | ||
| Unlimited WebM File Size | ||
| Forever Free WebM to MP4 Converter | ||
| No Software Installation Required | ||
| High-quality H.264 MP4 Output | ||
| MP4, MOV, MKV Output Supported |
WebM to Video Format Support
Convert WebM and other video formats to MP4, MOV, and more
Input Video Formats
Output Video Formats
WebM to MP4 Converter Reviews
Trusted by content creators, developers, and users worldwide
Content Creator
"I downloaded some clips in WebM and my video editor didn't support them. This converter turned them into MP4 in minutes, right in my browser. No upload, no fuss."
Online Student
"My university's lecture platform delivers WebM videos. Converting them to MP4 lets me watch on my iPhone offline. This tool is fast and completely private."
Web Developer
"Chrome screen recordings come out as WebM. I need MP4 for client presentations and Slack. This browser-based converter is my go-to — no upload, instant results."
Content Creator
"I downloaded some clips in WebM and my video editor didn't support them. This converter turned them into MP4 in minutes, right in my browser. No upload, no fuss."
Online Student
"My university's lecture platform delivers WebM videos. Converting them to MP4 lets me watch on my iPhone offline. This tool is fast and completely private."
Web Developer
"Chrome screen recordings come out as WebM. I need MP4 for client presentations and Slack. This browser-based converter is my go-to — no upload, instant results."
Content Creator
"I downloaded some clips in WebM and my video editor didn't support them. This converter turned them into MP4 in minutes, right in my browser. No upload, no fuss."
Online Student
"My university's lecture platform delivers WebM videos. Converting them to MP4 lets me watch on my iPhone offline. This tool is fast and completely private."
Web Developer
"Chrome screen recordings come out as WebM. I need MP4 for client presentations and Slack. This browser-based converter is my go-to — no upload, instant results."
Content Creator
"I downloaded some clips in WebM and my video editor didn't support them. This converter turned them into MP4 in minutes, right in my browser. No upload, no fuss."
Online Student
"My university's lecture platform delivers WebM videos. Converting them to MP4 lets me watch on my iPhone offline. This tool is fast and completely private."
Web Developer
"Chrome screen recordings come out as WebM. I need MP4 for client presentations and Slack. This browser-based converter is my go-to — no upload, instant results."
Video Editor
"Premiere Pro doesn't always handle WebM well. Converting to MP4 first solves every compatibility issue. The browser-based conversion is a game changer for my workflow."
Tech Enthusiast
"FFmpeg.wasm doing WebM to MP4 in the browser — impressive. No server, completely private, and it handles VP9 files perfectly. Exactly what I needed."
Social Media Creator
"I download reference videos in WebM but Instagram and TikTok need MP4. This converter bridges that gap instantly. Free, private, and works on my phone too."
Video Editor
"Premiere Pro doesn't always handle WebM well. Converting to MP4 first solves every compatibility issue. The browser-based conversion is a game changer for my workflow."
Tech Enthusiast
"FFmpeg.wasm doing WebM to MP4 in the browser — impressive. No server, completely private, and it handles VP9 files perfectly. Exactly what I needed."
Social Media Creator
"I download reference videos in WebM but Instagram and TikTok need MP4. This converter bridges that gap instantly. Free, private, and works on my phone too."
Video Editor
"Premiere Pro doesn't always handle WebM well. Converting to MP4 first solves every compatibility issue. The browser-based conversion is a game changer for my workflow."
Tech Enthusiast
"FFmpeg.wasm doing WebM to MP4 in the browser — impressive. No server, completely private, and it handles VP9 files perfectly. Exactly what I needed."
Social Media Creator
"I download reference videos in WebM but Instagram and TikTok need MP4. This converter bridges that gap instantly. Free, private, and works on my phone too."
Video Editor
"Premiere Pro doesn't always handle WebM well. Converting to MP4 first solves every compatibility issue. The browser-based conversion is a game changer for my workflow."
Tech Enthusiast
"FFmpeg.wasm doing WebM to MP4 in the browser — impressive. No server, completely private, and it handles VP9 files perfectly. Exactly what I needed."
Social Media Creator
"I download reference videos in WebM but Instagram and TikTok need MP4. This converter bridges that gap instantly. Free, private, and works on my phone too."
Free WebM to MP4 Converter Online — Convert WebM Video to MP4
Need to convert WebM to MP4 online free? Our browser-based WebM to MP4 converter processes your files instantly — no upload required. Whether your WebM came from a Chrome download, YouTube recording, or screen capture, convert it to MP4 for iPhone, Android, and media player compatibility in seconds.
