WebM Converter
Convert WebM video files to MP4, MOV, MKV, AVI, FLV and WMV and 18 more formats — free, in batches, files up to 10 GB, with no sign-up and no watermark.
Drop your WebM file
Choose the format you need
Download the result
Choose file
or drag & drop — video files
Free · Unlimited · No sign-up · Max 10 GB
Your privacy is our mission. Most files are converted right in your browser and never leave your device. Only large files, or formats a browser cannot process, are sent to our server over an encrypted connection — they are never stored, never shared, and deleted as soon as your download is ready.
What Is a WebM File?
WebM is a royalty-free video format made for the web: browsers play it natively and screen recorders often save in it. It compresses well with VP9 or AV1. WebM is a container rather than a compression method — container for VP8, VP9 or AV1 video with Opus or Vorbis audio. What is inside decides the quality.
WebM Facts
| Full name | WebM |
|---|---|
| File extension | .webm |
| Type | Video |
| How it stores data | Container for VP8, VP9 or AV1 video with Opus or Vorbis audio |
| Created by | Google, 2010 |
| Best for | video embedded in web pages, screen recordings |
| Watch out | iPhones, many TVs and most editing software do not open it |
| Opens with | Chrome, Firefox, Edge, VLC |
How to Open a WebM File
A .webm file opens with Chrome, Firefox, Edge, VLC. If none of those is at hand — or the file has to go into a program, device or website that refuses WebM — convert it: MP4, MOV and MKV are the usual choices.
Convert WebM to Another Format
Convert Other Formats to WebM
WebM Compared
Frequently Asked Questions
What is a WebM file?
WebM is a royalty-free video format made for the web: browsers play it natively and screen recorders often save in it. It compresses well with VP9 or AV1.
How do I open a .webm file?
With Chrome, Firefox, Edge, VLC. If your device or program does not accept it, convert the file to a format it does.
How do I convert a WebM file?
Drop the file into the converter on this page, choose the target format — MP4, MOV, MKV, AVI and FLV and others — and press Convert. It is free, there is no account and several files can be converted at once.
Is WebM lossy or lossless?
WebM is a container rather than a compression method — container for VP8, VP9 or AV1 video with Opus or Vorbis audio. What is inside decides the quality.
What is WebM good for, and what are its limits?
Best for: video embedded in web pages, screen recordings. Watch out: iPhones, many TVs and most editing software do not open it.
Is the WebM converter free, and how big can the files be?
It is free, with no account, no watermark and no daily limit. Files can be up to 10 GB each.
Which formats can be converted to WebM?
MP4, MOV, MKV, AVI, FLV, WMV, 3GP, TS, OGV and VOB.