Convert FLV to MKV Files Online for Free.
Free online tool to convert flv to mkv files quickly and securely. No installation required – start converting your files in just a few clicks!
Drag and drop your files here or click to upload.
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Maximum file size is 10MB
How It Works
How to Convert FLV to MKV
Click inside the file drop area to upload your FLV file or drag & drop it.
Select MKV as the output format and click the 'Convert' button.
Download the converted MKV file instantly after conversion.
You can also send a link to the converted file via email. (Optional)
Convert Your FLV files to other formats
RunConvert.com can convert your FLV files to these other formats:
Convert Your FLV files to other formats
Convert Files to FLV Format
RunConvert.com supports these converters to FLV format:
Convert Files to FLV Format
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Frequently Asked Questions
Here are some common questions and answers about flv file conversions ask by our users on RunConvert.com.
Frequently Asked Questions
Q: Why is MP4 so popular?
A: Because it works almost everywhere—from phones to TVs to websites. It’s the peanut butter of video formats.
Q: Can I convert time-lapse videos?
A: Definitely. They’ll stay fast-paced unless you choose to slow them down manually.
Q: Can I compress GoPro footage?
A: You bet. GoPro files can be huge, so converting them to a smaller MP4 is a smart move.
Q: Can I batch convert multiple videos at once?
A: Right now, we focus on one-at-a-time conversions to keep it smooth. Batch processing is in the works—hang tight!
Q: Can I use RunConvert for wedding videos?
A: Of course—whether it’s for sharing, archiving, or surprising your spouse with a highlight reel, we’ve got you.
Q: What’s the best format for PowerPoint video inserts?
A: MP4 with H.264 is your safest bet—it plays well inside most presentation tools.
Q: Is it safe to use RunConvert on public Wi-Fi?
A: We use HTTPS encryption, so your files are secure—even if you're sipping a latte at the airport café.
Q: Can I upload a video from Google Drive?
A: Not yet directly—but download it first and then upload to us. Simple workaround.
Q: Can I convert videos taken from Snapchat?
A: Absolutely—those vertical MP4s are perfect candidates for a quick format tweak.
Q: How long does it take to convert a video?
A: Usually just a few seconds for short clips. Bigger files take longer, but our servers are fast. You’ll be done before you know it.
What is FLV (Flash Video)?
FLV (Flash Video) is a multimedia file format used to deliver video over the internet. It is widely associated with Adobe Flash Player and is commonly used for streaming video on websites. The .flv extension is typically found in online video platforms like YouTube (before they switched to HTML5 video).
FLV files are designed for efficient streaming over the web, maintaining relatively small file sizes while offering decent video quality.
How to open FLV?
FLV files can be opened using a variety of media players, including VLC Media Player, Windows Media Player (with the proper codec), and PotPlayer.
For macOS users, VLC and Elmedia Player are reliable options for opening FLV files. Web browsers with Flash support can also display FLV videos, though Flash is no longer widely supported.
FLV is Developed by: Adobe Systems
FLV was Released on: 2005
Useful Links for FLV:
How to convert FLV?
Converting FLV files is easy with our online video converter. Upload your FLV file, choose the desired output format such as MP4, AVI, or MKV, and start the conversion.
Our converter provides fast and high-quality results, ensuring your FLV files are compatible with various devices and platforms.
What is MKV (Matroska Video)?
MKV (Matroska Video) is an open-source container format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is designed to be flexible and is often used for high-definition video content.
MKV is a popular choice for storing HD movies, TV shows, and videos due to its ability to support almost any type of video and audio codec, as well as multiple audio tracks and subtitles within one file.
How to open MKV?
MKV files can be opened with several media players, including VLC Media Player, PotPlayer, and Media Player Classic (MPC-HC).
For macOS users, VLC and IINA are great options to play MKV files. You can also use the official Elmedia Player for MKV playback.
MKV is Developed by: Matroska Association
MKV was Released on: 2003
Useful Links for MKV:
How to convert MKV?
You can easily convert MKV files to other formats like MP4, AVI, or MOV using our online video converter. Simply upload the MKV file, select your desired output format, and start the conversion process.
Our tool ensures quick and high-quality conversion, making MKV files compatible with a variety of devices and platforms.
What Our Users Say
Don't take our word for it – here's what users think about Runconvert.
Saved me hours of work
I had to convert multiple PDFs to Word for editing. This tool made it so easy and preserved all the formatting perfectly. The batch processing feature is a game changer.
Michael T
Professional quality
As a graphic designer, I need reliable conversion tools. This site delivers professional quality every time. The image conversions maintain resolution and color accuracy.
Elena R
Fast and reliable
I've tried many conversion tools but this one is by far the fastest and most reliable. No watermarks, no quality loss, and the interface is so intuitive.
David K
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