Online MKV to WEBM converter | Free GroupDocs Apps

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Convert MKV to WEBM

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We have already processed 8,914 files with total size of 18,799 Mbytes

Easily convert your MKV files online with no registration required. Convert your MKV documents from Windows, Linux, or macOS. Simply drag and drop your file into the upload form, select the desired output format, and click the convert button. Once the conversion is complete, you can download your WEBM file.

Depending on the MKV file's size and format, conversion may take a few moments, but most files convert quickly. With advanced features, you can convert password-protected documents and have the results sent to your email.

Convert your MKV documents anytime, anywhere, on any device—including mobile. Use this conversion app online 24/7—free for basic conversions.

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MKV

Matroska Video file format

MKV (Matroska Video File) is an open, flexible multimedia container format designed to store video, audio, subtitles, and metadata in a single file. It is widely supported by media players like VLC, MPC-HC, and tools such as MKVToolNix for editing and muxing. The format uses EBML (Extensible Binary Meta Language) for its structure, enabling advanced features like chapter support, multiple audio tracks, and seamless streaming capabilities.

WEBM

WEBM file format

WEBM is an open, royalty-free multimedia container format designed for web use, primarily for video and audio streaming. It is widely supported by modern web browsers, media players like VLC, and editing tools such as Adobe Premiere Pro and FFmpeg. The format uses VP8 or VP9 video codecs and Opus or Vorbis audio codecs, offering efficient compression, high-quality playback, and features like adaptive streaming and metadata support.

How it works

How to convert MKV to WEBM

Step 1

Click inside the file drop area to upload MKV file or drag & drop MKV file.

Step 2

Click on Convert button. Your MKV files will be uploaded and converted to WEBM result format.

Step 3

Download link of result files will be available instantly after conversion.

Step 4

You can also send a link to the WEBM file to your email address.

FAQ

Questions & Answers

Why is the MKV to WEBM conversion taking longer than expected?

Large file conversions can be time-consuming because the process often involves re-encoding and re-compressing the data, which requires significant computational resources.
Does this MKV to WEBM converter work on Linux, Mac, or Android?

Yes! Our online converter runs on any operating system with a web browser. No software installation is needed—just upload your MKV and convert it instantly.
Is my data secure when converting a MKV to WEBM?

Absolutely! Your files are processed securely. The WEBM download link is available immediately after conversion, and all uploaded files are automatically deleted after 24 hours. No one else can access your files.

Other Supported Conversions

You can also convert MKV into many other file formats. Please see the complete list below.

MKV TO MP4
MPEG-4 file format
MKV TO AVI
Avi file format
MKV TO FLV
Flash Video file format
MKV TO MKV
Matroska Video file format
MKV TO MOV
QuickTime file format
MKV TO WMV
WMV file format
MKV TO MP3
MP3
MKV TO AAC
Advanced Audio Coding
MKV TO AIFF
Audio Interchange File Format
MKV TO FLAC
Free Lossless Audio Codec
MKV TO M4A
M4A file format
MKV TO WMA
WMA file format
MKV TO AC3
AC3 file format
MKV TO OGG
OGG file format
MKV TO WAV
WAV file format

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