Convert MKV, MOV, AVI, and other formats to universal MP4.
or click to browse from your device
Make your videos playable on any device. Convert MKV, AVI, MOV, and more to the universal MP4 format.
Drag and drop your video file. We support almost any format (MKV, WEBM, FLV, AVI, MOV, etc.).
Our server re-encodes the video stream to H.264 and audio to AAC, wrapping them in an MP4 container.
Get your new file instantly. It's now ready to be watched on your iPhone, Smart TV, or uploaded to YouTube.
MP4 is technically a "container". It holds video and audio tracks. We ensure those tracks use the most compatible codecs (H.264 video, AAC audio).
Video compatibility is a minefield. MKV doesn't play on iPhone. MOV is huge. FLV is dead. But MP4 (H.264 + AAC) plays everywhere. It is the gold standard for video distribution.
RiseConvert uses FFmpeg with libx264, the world's most advanced video encoding library. We convert your video into a globally compatible container.
We also implement "Fast Start" (Moov Atom at start). This obscure but critical technical detail moves the video metadata to the beginning of the file, allowing playback to start immediately on the web before the full file is downloaded.
The most widely supported video compression standard in history.
Optimized for instant streaming on web and mobile.
iOS • Android • Windows • Mac • Linux
If you've ever tried to play an .MKV file on an iPhone or an .AVI file on a Mac, you know the pain of "Format Not Supported".
The Solution: MP4 (MPEG-4 Part 14) is the industry standard. It was designed to replace all older formats. By converting your videos to MP4, you future-proof them and ensure they can be shared with anyone, regardless of what device they use.
The magic behind the MP4 format is primarily the H.264 (AVC) video codec. It uses intelligent algorithms to compress video data without significant quality loss.
Unlike older formats that stored every single pixel of every frame, H.264 uses Inter-frame prediction:
The file format (like MP4, MKV) that wraps around the video and audio streams.
The algorithm used to compress the video (e.g., H.264) or audio (e.g., AAC).
Also known as AVC. The most compatible video compression standard in the world.
Advanced Audio Coding. The standard audio format for MP4 files, successor to MP3.
If the MP4 file is larger than the original, try setting the CRF to 28 or choosing the "Slow" preset for better compression efficiency.
This can happen with corrupted source files. Try playing the video on your device first to ensure it's not broken before uploading.
Yes. Unless you choose extreme compression settings, our CRF-based engine ensures the video looks visually identical to the source.
Files are processed in a secure environment and automatically deleted after 2 hours.
"My clients always send me weird formats. This tool fixes them so I can actually import them into Premiere."
"Saved my presentation! The school computer wouldn't play my MKV file, converted it here in 2 mins."
More Tools
All Video & Image Tools