1. Upload your MP4 file
Start by dragging and dropping your MP4 file into the upload area, or click to browse your device and select your file in the list.
MP4 to WEBM Converter Online
Convert your MP4 (.mp4) file to WEBM (.webm) in seconds straight from your browser. No installs. No watermarks. 100 % free.
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Why choose HappyScribe?
47+ Formats
Convert from MP4 to WEBM but also 47+ other formats.
100% Free
No signups, no fees, no hidden restrictions. Convert MP4 to WEBM directly in your browser for free.
Secure
We take your security seriously. All file transfers use 256-bit SSL encryption.
Online
No installs needed; convert MP4 to WEBM right from your browser, on any device, anytime.
How to convert MP4 to WEBM?
2. Choose WEBM format
Next, pick WEBM as the format you’d like to convert your video into. Alternatively, we support +47 formats that you can choose from. When you’re ready, hit the Convert button.
3. Download your converted WEBM
Once the conversion is complete, you’ll get a download link right away. Just click to save the file to your device. It’s fast, easy, and doesn’t require any software installation.
What is a MP4 file?
MP4 (MPEG‑4 Part 14) is the dominant container for online video. Based on QuickTime atoms, it can hold H.264/AVC, HEVC, AV1, AAC, AC‑3, timed text, and fragmented segments for adaptive streaming. Finalised in 2001 and revised in 2003 (ISO/IEC 14496‑14), MP4 became the hand‑off format of choice thanks to the iPod Video and PlayStation Portable. The arrival of HLS and DASH further entrenched MP4, which supports ‘moov’ boxes at either head or tail for progressive download or live streams.
What is a WEBM file?
WebM is a royalty‑free container designed by Google for the open web. It packages the Matroska profile with VP8/VP9/AV1 video and Vorbis/Opus audio, optimised for low overhead and HTML5 streaming. Announced at Google I/O 2010, WebM combined Matroska’s flexibility with On2’s newly open‑sourced VP8 codec. YouTube began offering WebM downloads the same year. Support grew as browsers added VP9 hardware decoding and will expand again with AV1.
Free Online MP4 to WEBM Converter
Need to convert your audio file from MP4 to WEBM? It’s simple. Just upload your file, choose the output format, and click ‘Convert’. That’s it — no downloads, no complicated software, and no hidden costs. Our tool is designed to be fast, secure, and completely free, so you can turn your files into the format you need in seconds.
Whether you’re converting audio for sharing, editing, or playback on different devices, our converter ensures high-quality output every time. After your conversion, you’ll also have the option to transcribe video to text, making it easy to turn your WEBM files into accurate, editable text in just a few clicks.
Frequently Asked Questions
How to open a MP4 file?
Virtually every player from Safari and Chrome to Xbox and Roku handles MP4. When editing, DaVinci Resolve and Final Cut Pro will optimise H.264 to intraframe proxies for smoother scrubbing. HandBrake transcodes old codecs like DivX to modern H.264+AAC MP4 profiles.
How to open a WEBM file?
Chrome, Firefox, Edge, and Android open WebM natively. Safari plays WebM starting macOS 14 with AV1 hardware decoders. Older editors may require transcoding to ProRes or H.264 MP4.
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