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