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FLV to MKV Converter — Fast & Free | 1converter
  1. Home
  2. FLV to MKV

FLV to MKV Converter — Fast & Free Online

Convert FLV to MKV for web optimization. Get smaller files that load faster online. MKV format offers open source.

FromFLVToMKV
Convert FLV to MKV Now
100% Free
Secure & Private
Fast Conversion
1CONVERTER Media Team - 1CONVERTER Team Logo
1CONVERTER Media Team·Audio & Video Specialists·Updated Mar 15, 2026
Official

How to Convert FLV to MKV

Follow these simple steps to convert your FLV files to MKV format in seconds

1

Step 1

Upload your FLV file

2

Step 2

Choose MKV as output format

3

Step 3

Adjust quality and conversion settings if needed

Visual Conversion Preview

flv

Source file

Size:2.4 MB
Format:FLV

Converting...

~2s

mkv

Output file

Choose Your Conversion Quality

Select the perfect balance between quality and file size for your FLV to MKV conversion

Low Quality

Smallest file size, faster conversion

File Size:Very Small
Speed:Very Fast
Quality Level
Recommended

Why Convert FLV to MKV?

Discover the advantages of converting your FLV files to MKV format

MKV provides open source

No software installation needed for FLV to MKV

Batch process multiple FLV files at once

Popular Use Cases

See how professionals use our FLV to MKV converter in real-world scenarios

1

Video editing with MKV exports

Convert FLV to MKV for this purpose quickly and easily.

2

FLV files for anime

Convert FLV to MKV for this purpose quickly and easily.

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Explore other popular file conversion options

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Convert FLV to 3GP

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FLV

Frequently Asked Questions

Everything you need to know about converting FLV to MKV

Yes, our basic FLV to MKV conversion is completely free. No registration required. Premium plans offer larger file sizes and batch processing.
FLV has some limitations: Deprecated, Flash discontinued. Converting to MKV can help overcome some of these limitations.
FLV (Flash Video) is Adobe Flash's video format. It was introduced in 2002 by Adobe.
Yes! You can set start and end points to trim your FLV video during conversion to MKV. No need for separate video editing software.
Free users can convert FLV files up to 10 MB. Pro plan supports up to 200 MB, and Business plan supports up to 500 MB per file.
Your original FLV file and the converted MKV file are automatically deleted from our servers within 24 hours for your privacy and security.

Still Have Questions?

Our support team is here to help you with any questions about FLV to MKV conversion.

Contact SupportView All FAQs
No Registration
4

Step 4

Click Convert to process your file

5

Step 5

Download your converted MKV file

Average conversion time: Less than 2 minutes

Size:1.4 MB
Saved:-41%
41%
Size Reduction
2s
Processing Time
99%+
Quality Retained

This visualization shows the FLV to MKV conversion process. A source FLV file of 2.4 MB is converted to MKV format resulting in 41% file size reduction while retaining 99%+ quality. The conversion takes approximately 2s.

Medium Quality

Balanced quality and size

File Size:Medium
Speed:Fast
Quality Level

High Quality

Better quality, larger files

File Size:Large
Speed:Moderate
Quality Level

Maximum Quality

Best quality, largest files

File Size:Very Large
Speed:Slow
Quality Level

Quality Selection Tips

When to use Low/Medium:

  • •Web uploads and social media sharing
  • •Email attachments with size limits
  • •Quick previews and thumbnails

When to use High/Maximum:

  • •Professional printing and publishing
  • •Archive and long-term storage
  • •When quality is more important than size

Video Tip: Medium quality is ideal for web streaming. Use High or Maximum for videos you plan to edit further or archive.

Maintain video quality from FLV source

MKV provides unlimited tracks

Additional Features

200+
Supported Formats
243+
File Formats
<2 min
Average Time
24/7
Available
3

Old websites with MKV output

Convert FLV to MKV for this purpose quickly and easily.

4

Social media clips in MKV

Convert FLV to MKV for this purpose quickly and easily.

5

FLV files for hd video

Convert FLV to MKV for this purpose quickly and easily.

Trusted by Professionals In

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Can't Find Your Conversion?

We support 200+ file formats. Browse our complete list of conversions or start converting now!

Start ConvertingView All Formats

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