# MKV to MP4 Converter Convert MKV video files to MP4 format > Canonical page: https://elysiatools.com/en/tools/mkv-to-mp4 - **Category:** Media - **Keywords:** mkv, mp4, convert, video, format, ffmpeg, matroska, container, transcode, h264 ## Overview Convert MKV (Matroska) videos to MP4 format. MKV is a flexible container format often used for high-quality video content, while MP4 offers universal compatibility with all devices and platforms. ## Inputs - **MKV Video File** (file): Select MKV video to convert - **Video Codec** (select) - **Audio Codec** (select) - **Subtitle Handling** (select) - **CRF Quality (18-28, lower is better)** (number): Only applies when re-encoding. 18-28 is recommended range ## When to use - When you have high-quality MKV files that won't play on mobile devices, smart TVs, or web browsers. - When you need to prepare videos for sharing on social media platforms or video hosting sites that require MP4. - When you want to quickly repackage video streams without re-encoding by copying the original codecs. ## How it works - Upload your MKV video file up to the 100 MB limit. - Select your preferred video and audio codecs, or choose 'Copy' to bypass re-encoding. - Set the CRF quality level and choose how to handle subtitles, then run the conversion to download your MP4 file. ## Use cases - Converting MKV movies to MP4 for playback on iPhones, iPads, or Android devices. - Preparing MKV screencasts for uploading to web platforms that only accept MP4. - Extracting and repackaging video files quickly using the stream copy option to save processing time. ## Frequently asked questions ### Can I convert MKV to MP4 without losing quality? Yes, by setting both the video and audio codecs to 'Copy', the tool repackages the streams into an MP4 container without re-encoding. ### What is the maximum file size supported? The converter supports MKV video files up to 100 MB. ### Which video codecs are supported? You can choose between H.264 (libx264), H.265/HEVC (libx265), MPEG-4, or copy the original stream. ### How does the CRF quality setting work? CRF stands for Constant Rate Factor. You can set it between 18 (higher quality) and 28 (lower quality) when re-encoding. ### Can I keep subtitles in the converted MP4? Yes, you can choose to convert subtitles to mov_text or copy them directly, though removing them is recommended for maximum compatibility. ## Related tools - [MP4 to MKV Converter](https://elysiatools.com/en/tools/mp4-to-mkv): Convert MP4 video files to MKV format - [Batch Video Converter](https://elysiatools.com/en/tools/video-batch-converter): Convert multiple video files between different formats like MP4, WebM, MKV, AVI, MOV with quality settings and batch processing - [Video to GIF Optimized](https://elysiatools.com/en/tools/video-to-gif-optimized): Convert videos to optimized GIF format with advanced compression settings - [Stream Smart Remux](https://elysiatools.com/en/tools/stream-smart-remux): Rewrap media containers with stream copy. - [AVI to MP4 Converter](https://elysiatools.com/en/tools/avi-to-mp4): Convert AVI video files to MP4 format - [FLV to MP4 Converter](https://elysiatools.com/en/tools/flv-to-mp4): Convert FLV video files to MP4 format - [MOV to MP4 Converter](https://elysiatools.com/en/tools/mov-to-mp4): Convert MOV video files to MP4 format - [MP4 to AVI Converter](https://elysiatools.com/en/tools/mp4-to-avi): Convert MP4 video files to AVI format ## Samples - [Video H.264 Samples](https://elysiatools.com/en/samples/video-h264-samples): Sample video files encoded in H.264 (AVC) format - [Video AV1 Samples](https://elysiatools.com/en/samples/video-av1-samples): Sample video files encoded in AV1 format - [Video H.265 Samples](https://elysiatools.com/en/samples/video-h265-samples): Sample video files encoded in H.265 (HEVC) format - [Video Samples](https://elysiatools.com/en/samples/video-samples): Sample video files in different formats and orientations ## Related content - [Audio Encoding and Format Conversion Tools](https://elysiatools.com/en/hubs/audio-convert): Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows. - [Video-to-Audio and Animation Conversion Tools](https://elysiatools.com/en/hubs/video-convert): Compare tools that turn video into audio, extract video streams, and convert between short-form video and animated image formats in one hub. - [Audio Editing and Cleanup Tools](https://elysiatools.com/en/hubs/audio-utility): Compare audio trimming, silence removal, fades, mixing, and denoise tools in one hub for podcast, voiceover, and music cleanup workflows. - [Video Preview, Extraction, and Subtitle Tools](https://elysiatools.com/en/hubs/video-utility): Compare video preview generation, stream extraction, audio extraction, subtitle translation, and quick flip tools in one hub for lightweight video prep workflows.