Does converting MKV to MP4 reduce quality?

In most cases, converting MKV to MP4 does not reduce quality if the original video codec and bitrate are preserved. FastlyConvert is optimized to keep the original quality whenever possible. If you choose a lower resolution or higher compression, some quality loss may occur.

Why won't my MKV file play on my TV or phone?

Many TVs, phones and media players do not support the MKV container format or some of the codecs used inside MKV files. Converting your MKV file to MP4 makes it compatible with most devices and apps.

Is MKV better than MP4?

MKV is very flexible and ideal for storing multiple audio and subtitle tracks, while MP4 is simpler but far more compatible. For archiving, MKV is often preferred. For daily watching, sharing and uploading, MP4 is usually the better choice.

Can I convert large MKV files?

You can convert large MKV files with FastlyConvert, but processing time depends on file size and your connection speed. For extremely large files, you may want to split them or use lighter compression settings to speed up the conversion.

MKV to MP4 Converter - Convert MKV to MP4 Online Free

videocam Free Online Converter

MKV to MP4 Converter

Convert MKV videos to MP4 format online. Fast, free, and high-quality conversion.

check_circleNo Quality Loss check_circleUniversal Compatibility check_circleFast Conversion

video_file

Drop your MKV file here

or click to select file

Supports MKV files - Max 500MB (Pro: 2GB)

Why Convert MKV to MP4?

MKV is powerful but not universally supported. MP4 works everywhere.

devices

Universal Compatibility

MP4 plays on all devices - smartphones, tablets, smart TVs, and gaming consoles without any extra software.

Easy Sharing

Upload to YouTube, social media, or send via messaging apps. MP4 is accepted everywhere.

high_quality

Quality Preserved

Our converter maintains the original video quality. No degradation in your footage.

How to Convert MKV to MP4

Upload MKV File

Drag and drop your MKV file or click to browse your computer.

Choose Settings

Select quality and resolution options. Keep original quality or compress for smaller files.

Download MP4

Wait for conversion to complete and download your MP4 file.

MKV vs MP4 Comparison

video_fileMKV Format

+Multiple audio/subtitle tracks
+Chapter support
+High quality container
-Limited device support
-Not accepted by most platforms

video_fileMP4 Format

+Universal compatibility
+Widely accepted online
+Efficient compression
+Plays on all devices
-Fewer advanced features

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