Video to MP4 Converter

Convert MKV, MOV, AVI, and other formats to universal MP4.

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Drag & Drop Video files here

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How to Convert to MP4?

Make your videos playable on any device. Convert MKV, AVI, MOV, and more to the universal MP4 format.

1

Upload File

Drag and drop your video file. We support almost any format (MKV, WEBM, FLV, AVI, MOV, etc.).

2

Auto-Convert

Our server re-encodes the video stream to H.264 and audio to AAC, wrapping them in an MP4 container.

3

Download MP4

Get your new file instantly. It's now ready to be watched on your iPhone, Smart TV, or uploaded to YouTube.

Did you know?

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).

Engineering Philosophy

The Universal Format.
Why MP4 Rules the World.

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.

Standardized for reliability

H.264 Codec

The most widely supported video compression standard in history.

Fast Start

Optimized for instant streaming on web and mobile.

Cross-Platform

iOS • Android • Windows • Mac • Linux

Why Everyone Uses MP4

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.

Format Compatibility Check

Device / Platform
Others (MKV/AVI)
MP4 (H.264)
iPhone / iPad
Only with VLC/Apps
Native Support
Android
Support Varies
Native Support
Windows / Mac
Requires Codecs
Native Support
Smart TVs
Hit or Miss
Universal
Web Browsers
Not Supported
Universal

Understanding H.264 Compression

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:

  • I-Frames (Keyframes): Full images stored completely, acting as reference points.
  • P-Frames & B-Frames: These only store the changes from previous or future frames (like movement), saving massive amounts of data.
  • Efficiency: This is why a static shot of a person talking takes up far less space than a shot of running water—there's less "change" to record.

Tech Glossary

Container

The file format (like MP4, MKV) that wraps around the video and audio streams.

Codec

The algorithm used to compress the video (e.g., H.264) or audio (e.g., AAC).

H.264

Also known as AVC. The most compatible video compression standard in the world.

AAC

Advanced Audio Coding. The standard audio format for MP4 files, successor to MP3.

Common Issues & Solutions

Large File Size?

If the MP4 file is larger than the original, try setting the CRF to 28 or choosing the "Slow" preset for better compression efficiency.

Conversion Failed?

This can happen with corrupted source files. Try playing the video on your device first to ensure it's not broken before uploading.

Is quality preserved?

Yes. Unless you choose extreme compression settings, our CRF-based engine ensures the video looks visually identical to the source.

Tool Specs
InputAny Format
Output.MP4
Video CodecH.264
Privacy Encrypted

Secure Processing

Files are processed in a secure environment and automatically deleted after 2 hours.

User Feedback

"My clients always send me weird formats. This tool fixes them so I can actually import them into Premiere."

D
David R.
Video Editor

"Saved my presentation! The school computer wouldn't play my MKV file, converted it here in 2 mins."

L
Lisa M.
Student

Frequently Asked Questions

How long does it take?
It depends on the file size. Small clips convert in seconds. Larger movies might take a few minutes.
What happens to the audio?
We convert audio to AAC (Advanced Audio Coding), which is high quality and compatible with MP4.
Can I batch convert files?
Yes! You can select multiple files at once and we will process them sequentially.
Is it free?
Yes, RiseConvert is free. We have generous file limits suitable for most personal use cases.