About MP4 Converter
MP4 is the format every phone, browser, TV box and social platform accepts; everything else is a compatibility gamble. This converter takes the common containers that cameras, screen recorders and download sites produce and rebuilds them as a standard MP4 with H.264 video and AAC audio, the combination with the widest playback support available today.
The file is processed by FFmpeg on our server, not in your browser tab. That keeps the job fast and consistent even on an older laptop, and it means large files do not exhaust your device's memory. Upload the video, choose how much quality you want to keep, and download the result; the upload and output are removed from the server as soon as the download finishes.
What this tool does
One output that plays everywhere
Every result is H.264 video plus AAC audio inside an MP4 container, the standard combination for iPhones, Android phones, Windows, macOS, smart TVs and the major social platforms.
Three quality presets
Choose high, balanced or small before converting. Balanced is the right default for most clips; high keeps more fine detail in footage with grain or fast motion.
Faststart for instant playback
The MP4 index is moved to the front of the file, so video players and messaging apps can begin playing before the whole download has finished.
Handles the common containers
Upload MP4, MOV, MKV, WebM, AVI, WMV, FLV, MPEG, 3GP, M4V, OGV or TS; the converter decodes the video and audio streams and writes a fresh MP4.
Clean 8-bit output
The result is standard 8-bit 4:2:0 video, which avoids the grey bars, green frames and audio drift that come from mismatched or unsupported codecs.
Automatic deletion
The uploaded video and the converted MP4 live in a temporary folder only and are deleted automatically after the download; nothing is kept for later.
How to use MP4 Converter
- 01
Select your video
Drop a file onto the workspace or click to browse. The picker accepts MP4, MOV, MKV, WebM, AVI and the other containers listed on this page, up to 100 MB.
- 02
Choose a quality preset
Pick high when detail matters, balanced for everyday sharing, or small when the clip needs to slip into an email or chat limit.
- 03
Start the conversion
Click Convert to MP4. The upload progress bar tracks the transfer, then the server re-encodes the video and audio into the MP4 format.
- 04
Download and check the result
The MP4 appears with a player preview so you can confirm it looks right before saving it to your device.
- 05
Start over when you need another file
Use Start over to clear the result and upload a different clip. Only one video is processed at a time.
Supported formats and limits
- Input
- MP4MOVMKVWebMAVIWMVFLVMPEG3GPTS
- Output
- MP4
- Processing
- Server-side FFmpeg job in a temporary directory, deleted after download.
- Maximum size
- Up to 100 MB
- Requirements
- Chrome, Edge, Firefox or Safari · Server-side FFmpeg conversion
Limitations worth knowing
- One file per job and a 100 MB upload limit; there is no batch conversion.
- Conversion always re-encodes the video, so the result is not a bit-for-bit copy of the original streams.
- Subtitles and extra audio tracks are not carried over; only the first video and first audio streams are kept.
- Jobs stop after three minutes, so long or very high-resolution clips may not finish.
Privacy and file handling
Your video is uploaded to a temporary working directory on our server, converted with FFmpeg, and streamed back to your browser. The upload and the converted MP4 are deleted automatically when the download completes, and nothing is written to permanent storage, logged as content or shared. Accounts are not required.
Read the full privacy policy