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  2. MP4 to MKV
1CONVERTER Media Team - 1CONVERTER Team Logo
1CONVERTER Media Team·Audio & Video Specialists·Updated Mar 15, 2026
Official

Frequently Asked Questions

Everything you need to know about converting MP4 to MKV

Free users can convert MP4 files up to 10 MB. Pro plan supports up to 200 MB, and Business plan supports up to 500 MB per file.
Yes! Our batch conversion feature lets you upload and convert multiple MP4 files to MKV simultaneously, saving you significant time.
Absolutely. All uploads are encrypted with SSL/TLS, processed on secure servers, and automatically deleted within 24 hours. We never share or access your files.
Yes! Our converter is fully mobile-responsive. Convert MP4 to MKV on iPhone, Android, or any mobile device with a web browser.
We use advanced algorithms to maintain the highest possible quality. MKV offers open source.
Your original MP4 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 MP4 to MKV conversion.

Contact SupportView All FAQs

MP4 to MKV Converter — Fast & Free Online

Transform your MP4 files into MKV format instantly. Professional MP4 to MKV conversion with no registration required.

FromMP4ToMKV
Convert MP4 to MKV Now
100% Free
Secure & Private
Fast Conversion
No Registration

How to Convert MP4 to MKV

Follow these simple steps to convert your MP4 files to MKV format in seconds

1

Step 1

Upload your MP4 file

2

Step 2

Choose MKV as output format

3

Step 3

Adjust quality and conversion settings if needed

4

Step 4

Click Convert to process your file

5

Step 5

Download your converted MKV file

Average conversion time: Less than 2 minutes

Visual Conversion Preview

mp4

Source file

Size:2.4 MB
Format:MP4

Converting...

~4s

mkv

Output file

Size:1.2 MB
Saved:-48%
48%
Size Reduction
4s
Processing Time
99%+
Quality Retained

This visualization shows the typical conversion process from MP4 to MKV format, including expected size reduction and quality retention.

Choose Your Conversion Quality

Select the perfect balance between quality and file size for your MP4 to MKV conversion

conversionPage.qualityLow

conversionPage.qualityLowDesc

File Size:conversionPage.fileSizeVerySmall
Speed:conversionPage.speedVeryFast
Quality Level
Recommended

conversionPage.qualityMedium

conversionPage.qualityMediumDesc

File Size:conversionPage.fileSizeMedium
Speed:conversionPage.speedFast
Quality Level

conversionPage.qualityHigh

conversionPage.qualityHighDesc

File Size:conversionPage.fileSizeLarge
Speed:conversionPage.speedModerate
Quality Level

conversionPage.qualityMaximum

conversionPage.qualityMaximumDesc

File Size:conversionPage.fileSizeVeryLarge
Speed:conversionPage.speedSlow
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.

Why Convert MP4 to MKV?

Discover the advantages of converting your MP4 files to MKV format

MKV provides chapter support

MKV provides open source

MKV provides unlimited tracks

Maintain video quality from MP4 source

MKV streaming-ready output

Additional Features

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

Popular Use Cases

See how professionals use our MP4 to MKV converter in real-world scenarios

1

MP4 files for anime

Convert MP4 to MKV for this purpose quickly and easily.

2

Video editing with MKV output

Convert MP4 to MKV for this purpose quickly and easily.

3

MP4 files for hd video

Convert MP4 to MKV for this purpose quickly and easily.

4

MP4 files for multiple audio tracks

Convert MP4 to MKV for this purpose quickly and easily.

5

YouTube uploads from MP4 recordings

Convert MP4 to MKV for this purpose quickly and easily.

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Can't Find Your Conversion?

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

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