MKV
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FLV

Convert MKV to FLV Online

Convert MKV to FLV online. Start with free daily conversions, no install, no watermarks, and visible job status.

MKV to FLV Converter

Upload your MKV file to convert it to FLV format

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How to Convert MKV to FLV

Follow these simple steps

1

Step 1: Upload Your File

Upload your MKV file by dragging and dropping or clicking to browse

2

Step 2: Select Output Format

FLV is automatically selected as the output format

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Step 3: Start Conversion

Click the Convert button to start the conversion

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Step 4: Download Result

Download your converted FLV file when ready

Convert MKV to FLV - Complete Guide

Converting MKV to FLV stays in the video file family but changes the traits that decide size, quality, transparency, editability, or device support. MKV is a flexible video container format often used for high-quality video, subtitles, and multi-track media. FLV is a video format. Flash video. Below is what actually changes in a MKV→FLV conversion, what is preserved, and when FLV is the better choice than keeping MKV.

What changes when you convert MKV to FLV

  • The video is re-encoded into the FLV format. Because re-encoding is not free, start from the highest-quality source you have and keep quality settings high.
  • Expect a smaller output file: FLV is typically more space-efficient than MKV for the same content.

About the MKV format

MKV (Matroska Video) is a flexible container format that can hold multiple video, audio, and subtitle tracks. Our converter extracts and transforms MKV content.

  • Full name: Matroska Video
  • Developer: Matroska.org
  • Compression: Various (H.264, H.265, VP9)
  • Opens with: VLC, Plex, MKVToolNix

Where MKV is strong: stores multiple audio, video, and subtitle tracks; flexible, high-quality container.

Typical MKV uses: high-quality video libraries, multi-track and subtitled video.

About the FLV format

FLV (Flash Video) was popular for web video before HTML5. Our converter transforms legacy FLV files to modern, widely-compatible formats.

  • Full name: Flash Video
  • Developer: Adobe
  • Compression: H.263/VP6 (Video), MP3/AAC (Audio)
  • Opens with: VLC, FFmpeg

Where FLV is strong: small files that streamed efficiently in the Flash era; once the standard for online video.

Typical FLV uses: legacy Flash web video, older online video archives.

What FLV keeps

  • FLV adds: small files that streamed efficiently in the Flash era.

Things to watch out for

  • One FLV limitation to keep in mind: relies on the discontinued Flash Player.

When to convert MKV to FLV

  • Convert MKV to FLV for legacy Flash web video.
  • Convert MKV to FLV for older online video archives.
  • Pick FLV when you need once the standard for online video.

MKV vs FLV — format comparison

A quick side-by-side of the structural differences between MKV and FLV, so you can confirm this is the right conversion for your file:

AttributeMKVFLV
TypeVideo fileVideo file
CompressionFlexible (lossy or lossless)Lossy
Web-friendlyNoNo
Typical file sizeLargeSmall
Best forhigh-quality video librarieslegacy Flash web video

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Files are handled for the conversion you request. Uploads and downloads use HTTPS/TLS, and temporary files are cleared after the processing and deletion window.

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Need the opposite conversion?

Convert FLV to MKV

Other MKV Conversions

More formats you can convert MKV to

Convert MKV to MP4Convert MKV to WEBMConvert MKV to MOVConvert MKV to AVIConvert MKV to MP3Convert MKV to WMVConvert MKV to 3GPConvert MKV to MPEGConvert MKV to MPGConvert MKV to TSConvert MKV to OGVConvert MKV to 3G2Convert MKV to ASFConvert MKV to M4VConvert MKV to AACConvert MKV to WAVConvert MKV to OGGConvert MKV to FLACConvert MKV to M4AConvert MKV to WMAConvert MKV to AIFFConvert MKV to OPUS
View all MKV conversions →

Convert to FLV

Other formats you can convert to FLV

Convert MP4 to FLVConvert MOV to FLVConvert WEBM to FLVConvert AVI to FLVConvert M4V to FLVConvert WMV to FLVConvert 3GP to FLVConvert 3G2 to FLVConvert MPEG to FLVConvert MPG to FLVConvert TS to FLVConvert MTS to FLVConvert M2TS to FLVConvert VOB to FLVConvert OGV to FLVConvert ASF to FLV
View all FLV conversions →

Popular Related Conversions

Convert MKV to MP4Convert MKV to MP3

MKV to FLV FAQ

Converting MKV to FLV preserves the content faithfully; output also depends on the source file and any settings you choose.
Upload your MKV file, confirm FLV as the output format, and click Convert. Job status is shown while the file is processed, then you can download the FLV result.
Yes. You can start with free daily conversions, with no signup required for your first jobs and no watermarks on the output. Accounts and paid plans are available for higher-volume work.
No. The MKV to FLV conversion runs in your browser on any device — Windows, Mac, Linux, iOS, or Android — with uploads and downloads over HTTPS.
MKV is the Matroska multimedia container. It can contain video, audio, subtitles, and chapters in a single file.
MP4 is more widely compatible with devices, TVs, and media players than MKV.
When converting to formats that support subtitles, they can be preserved or burned into the video.
Yes! Our converter lets you choose which audio track to include in the converted file.
FLV (Flash Video) is a video file format. FLV files can be played with various video players and media applications.
Upload your FLV video to the converter, select your desired output format, and click Convert. The job status appears while the video is processed.

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