Online FLV to MKV converter | Free GroupDocs Apps

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Convert FLV to MKV

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We have already processed 4,954,948 files with total size of 7,784,805 Mbytes

Convert FLV to MKV files online with our free video converter app. No matter your platform — Windows 10, Mac or iPhone — you can convert FLV audio files with any resolution rapidly.

The most popular video formats are MP4, AVI, MKV, and MOV. MP4 is the most widely supported, balancing quality and file size, while AVI and MKV offer flexibility for high-quality playback, and MOV is optimized for Apple devices. Video files can be edited using video editing software such as Adobe Premiere Pro, Final Cut Pro, or DaVinci Resolve.

Change FLV to MKV in seconds — drop your file into the upload form, pick MKV as the output, and hit Convert. Download the result video file right after conversion.

Check our video

FLV

Flash Video file format

FLV (Flash Video File) is a container file format developed by Adobe Systems for delivering video and audio content over the internet. It is commonly used with Adobe Flash Player, supported by media players like VLC, and can be created or converted using tools like FFmpeg or Adobe Animate. The format uses a lightweight structure with metadata tags, supports streaming via RTMP, and allows for embedding of interactive elements like captions and cue points, making it suitable for web-based video playback.

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.

How it works

How to convert FLV to MKV

Step 1

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

Step 2

Click on Convert button. Your FLV files will be uploaded and converted to MKV 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 MKV file to your email address.

FAQ

Questions & Answers

Do you offer a FLV conversion API for developers?

Absolutely! With the GroupDocs.Conversion API, you can integrate document conversion capabilities into your .NET, Java, Python, or Node.js applications.
Do I need a specific browser to convert FLV?

No, our converter works with all modern browsers, including Chrome, Firefox, Opera, and Safari. Just open the website and start converting.
When are my uploaded files removed from your servers?

Files remain on our servers for 24 hours before being permanently deleted to ensure your privacy and security.
What options do I have for getting my converted FLV?

After conversion, a download link will be provided. You can download the file right away or send the link to your email for later access.
What is the typical time required to convert a FLV?

Conversion time depends on the FLV file size, but in most cases, you’ll receive the converted file in just a few seconds.

Other Supported Conversions

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

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

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