Home · Converters · Video

MP4 to WEBM Converter

Convert MP4 (.mp4) to WebM (.webm) via a free public conversion API from the browser. UniConvert is come-convert-leave: no account and no permanent file library.

Open the interactive MP4 to WEBM Converter (loads automatically when JavaScript is available).

How to convert MP4 to WEBM

Step 1. Choose a .mp4 file from your device.
Step 2. Confirm the output format is .webm — this page is already set to MP4 → WEBM.
Step 3. Start the conversion, then preview, copy, or download the .webm result. Nothing is kept for later.

Why convert MP4 to WEBM here

MP4 → WEBM uses a free public API called directly from the page — no UniConvert servers in the middle.
Category: Video — Convert video containers and extract audio when media tooling is installed.
No signup, no subscription, and no permanent storage of your files on UniConvert.
Status: available now.

MP4 to WEBM FAQ

Is this MP4 to WEBM converter free?

Yes. UniConvert does not require an account for MP4 → WEBM. Ads may appear to keep the site free.

Do you store my MP4 files?

Files for this pair are sent to the free conversion provider for processing and are not stored by UniConvert afterward.

What is the difference between .mp4 and .webm?

.mp4 is treated as the input format and .webm as the output. Use this page when you specifically need MP4 → WebM rather than a generic upload form.

Can I convert other formats in Video?

Yes — open the Video category for other pairs, or use Convert a file to pick any available source and target.