Convert any video format (MKV, AVI, MOV, WEBM) to universal MP4 (H.264) online. Best for iPhone, Android, and Premiere Pro compatibility.
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Your privacy is our mandate. Files are processed in isolated sandbox containers and are automatically wiped from our servers after 2 hours.
GDPR CompliantTransform your video clips into universal MP4 format. Our intelligent engine optimizes compression for the best balance of quality and file size.
Select MKV, MOV, AVI, or WEBM files. Drag and drop supported. All major formats are accepted.
Adjust the Quality (CRF) and Encoding Speed (Preset) to tailor the output to your needs.
Click 'Convert' and download your MP4 file instantly. Ready for playback on any device.
CRF (Constant Rate Factor) controls quality. Lower values (18) mean higher quality but larger files. Higher values (28) mean smaller files but lower quality. We recommend 23 as the sweet spot.
Our converter provides professional control over your video encoding process.
Uses the industry standard H.264 codec for maximum compatibility across all devices and browsers.
Choose between 'Ultrafast' for quick previews or 'Slow' for maximum compression efficiency.
Videos are optimized for web streaming, so they start playing instantly before fully loading.
Heavy processing is done on our servers, keeping your device cool and battery full.
MP4 is the standard for a reason. Here's who uses it most.
Join thousands of users who rely on our Video to MP4 engine for their daily conversions.
"My clients always send me weird formats like .mkv. This tool fixes them so I can actually import them into Premiere Pro."
"Saved my presentation! The school computer wouldn't play my MOV file, converted it here in 2 mins and it worked perfectly."
"Fast and reliable. I use the 'Small Size' CRF setting to compress my backups. Works great."
Video compatibility is a minefield. MKV doesn't play on iPhone. MOV can be huge. FLV is obsolete. 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.
Inter-frame prediction: Unlike older formats that stored every single pixel of every frame, H.264 only stores the changes from previous frames (like movement), saving massive amounts of data while keeping the video crisp.
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).
Constant Rate Factor. The setting that determines quality vs file size balance.
The amount of data processed per second. Higher bitrate usually means better quality.
Advanced Audio Coding. The standard audio format for MP4 files, successor to MP3.
Encoding speed. Slower presets (like 'slow') compress better than 'ultrafast' for the same quality.
Our engine is designed on a "Volatile-Memory" principle—once your MP4 is downloaded, the session is cryptographically purged.
Files are automatically and permanently wiped from our secure servers after 2 hours.
Using TLS 1.3 and military-grade SSL encryption for all transfers.
