Convert MKV to FLV Online — Free & Fast | AnyConv

MKV to FLV Converter

Quickly convert multiple mkv files to flv — free & online.

Drag & drop your files here or click to upload

How to convert MKV to FLV online

Follow these simple steps to convert mkv files to flv using AnyConv. It works on all devices — Windows, Mac, Linux, iPhone, Android.

Upload your MKV file

Drag & drop your file into the upload area. You can also click to select it manually. Max file size: 100 MB.

Start converting

Hit the “Convert” button to turn your MKV into FLV. The process usually takes just a few seconds.

Download your FLV

Once ready, download your converted file instantly. The download link is private and only works on your device.

What is a MKV file?

MKV (Matroska Video) is a flexible, open-standard container format capable of holding unlimited video, audio, subtitle tracks, and metadata. It’s popular for high-quality video content, including HD and Blu-ray rips.

MKV is widely supported and ideal for movies, series, and complex media projects. It’s open-source and favored for its advanced features and strong compression support.

How to open MKV files

MKV files are supported by VLC, MPC-HC, KMPlayer, and many smart TVs and media servers. It's a preferred format for high-definition video and multiple tracks.

Use AnyConv to convert MKV to MP4 or another format for broader compatibility.

Key facts about MKV

  • Full name: Matroska Video File
  • Extension: .mkv
  • MIME type: video/x-matroska
  • Developed by: Matroska.org
  • Initial release: 2002

Useful links and resources

What is a FLV file?

FLV (Flash Video) is a video format created by Adobe for use with Flash Player. It was widely used for video streaming across the web, especially on platforms like YouTube in the early days.

Although Flash is no longer supported, FLV remains a recognizable format and can be easily converted to MP4 or other formats for modern playback.

How to open FLV files

FLV files can be opened using VLC, KMPlayer, or legacy Flash-based video players. Though Flash has been phased out, FLV is still supported by many modern tools.

To convert FLV to MP4 or another current format, use AnyConv online.

Key facts about FLV

  • Full name: Flash Video File
  • Extension: .flv
  • MIME type: video/x-flv
  • Developed by: Adobe Systems
  • Initial release: 2002

Useful links and resources

Convert to FLV

Want to get a file in FLV format? Choose the original format you’re starting with — AnyConv can quickly convert dozens of file types into FLV.

❓ Frequently Asked Questions

Answers to common questions about converting MKV to FLV
  • Do I need to register to convert MKV files?
    Not at all! You can convert MKV to FLV without signing up or installing anything.
  • Is it safe to convert MKV to FLV on AnyConv?
    Absolutely. All MKV and FLV files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
  • Will the quality change after converting MKV to FLV?
    We do our best to preserve the original quality during MKV to FLV conversion. The result is accurate and clean.
  • How long does it take to convert MKV to FLV?
    Most conversions from MKV to FLV take just a few seconds — even for larger files.
  • Can I upload more than one MKV file?
    Yes, batch conversion is supported. You can convert multiple MKV files to FLV at once — fast and easy.
  • What browsers support MKV to FLV conversion?
    All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting MKV to FLV on any platform.
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