Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.WEBM
File Type
WebM
Category
Video
Best first step
Use compatible software
Quick Summary
A practical overview of the .webm file format
WebM is an open, royalty-free, media file format designed for the web. It is primarily intended to offer a high-quality, open-source alternative for use in HTML5 video and audio elements. WebM files typically contain video streams compressed with the VP8 or VP9 video codecs and audio streams compre…
File extension
.WEBM
File type
WebM
Category
Video
Recommended action
Open with a trusted compatible app
How to open a .webm file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .webm.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .webm file?
File extension details and usage information
WebM is an open, royalty-free, media file format designed for the web. It is primarily intended to offer a high-quality, open-source alternative for use in HTML5 video and audio elements. WebM files typically contain video streams compressed with the VP8 or VP9 video codecs and audio streams compressed with the Vorbis or Opus audio codecs. The container format is based on a profile of Matroska (MKV), which provides a flexible and extensible structure for storing multimedia data. WebM's open and royalty-free nature makes it an attractive option for web developers and content creators who want to avoid licensing fees and ensure broad compatibility across different browsers and platforms. It is widely supported by modern web browsers, including Chrome, Firefox, Opera, and Edge. The format is designed to be efficient for streaming and playback, making it suitable for online video distribution. WebM is also used in various other applications, such as video conferencing and screen recording.
Software Compatibility
Programs that may open or work with .webm files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .webm files be converted?
Options for saving or exporting this file to another format
In many cases, a .webm file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .webm file.
Why can't I open a .webm file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .webm format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .webm files
To open a .webm file, use software that supports this file format.
- VLC Media Player
- MPC-HC
- PotPlayer
- Google Chrome
- Mozilla Firefox
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .webm file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.