WEBM to MP4
WEBM to MP4 is a free online tool that converts WEBM files to MP4 directly in your browser — no sign-up, no watermark, and no upload.
Free · unlimited · processed privately in your browser
or drag and drop a file here
Supported: WEBM
Your files stay private — 100% in your browser
We never upload your files, photos, or videos to any server. Everything is processed directly in your browser, so your data never leaves your device. That means zero privacy worries — no one else can ever see or store what you convert.
- No uploads
- Processed on your device
- No sign-up needed
About WEBM to MP4
WEBM to MP4 converts your WEBM files to MP4 for free, right in your browser. WEBM is an open, web-first video format, so converting WEBM to MP4 produces the most universally compatible video file — it plays on practically any phone, browser, or player. There is no sign-up, no watermark, and no limit on how many files you can convert. The whole process happens on your own device using your browser, so your media is never uploaded and nobody else can access it.
After you upload
WEBM to MP4 needs no settings — the conversion starts as soon as you run it and finishes in your browser, so nothing is uploaded.
How to use WEBM to MP4
- 1Click Choose Files and select the WEBM file you want to convert.
- 2The tool reads your WEBM file and prepares it for conversion.
- 3Press Run to convert it to MP4 directly in your browser — nothing is uploaded.
- 4Download your new MP4 file instantly.
Frequently asked questions
What is WEBM?
An open, royalty-free video format designed for the web, offering small sizes with VP8/VP9 codecs.
What is MP4?
The most widely compatible video container, playable on virtually every device and platform.
Why convert WEBM to MP4?
WEBM is an open, web-first video format, so converting WEBM to MP4 produces the most universally compatible video file — it plays on practically any phone, browser, or player.
Will converting WEBM to MP4 reduce the quality?
Both WEBM and MP4 are lossy. Converting re-encodes the file, which can lose a small amount of quality; converting once at a good bitrate keeps the result very close to the original.
Is WEBM to MP4 free?
Yes — WEBM to MP4 is free to use as often as you like, with no account, no caps, and no watermark on the output.
Do I need to install anything?
Nothing to install. WEBM to MP4 works inside your web browser on desktop and mobile — no app, codecs, or plugins needed.
Are my files uploaded to a server?
No. Your media files are processed on your own device and never sent to a server, so they stay private.
How to convert webm to mp4?
Use WEBM to MP4 above: upload your file, run it, and download the result. It is free with no limits or sign-up, and the whole process happens on your own device using your browser, so your media is never uploaded and nobody else can access it.
What is a webm file?
Use WEBM to MP4 above: upload your file, run it, and download the result. It is free with no limits or sign-up, and the whole process happens on your own device using your browser, so your media is never uploaded and nobody else can access it.