Free Online MP4 Converter

Convert video to MP4 instantly. Convert MKV, MOV, WebM, AVI, FLV to MP4 — or convert MP4 to other video formats and audio. 100% browser-based, no upload, no registration required.

Drag and drop any video file here to convert to MP4

Max file size 1GB. Free, no registration required.

How to convert MP4 files?

1

Upload your file

Click 'Choose Files' or drag and drop your file into the upload area.

2

Select the output format

Choose the target format you want to convert to.

3

Start conversion

Click 'Convert' and wait a few seconds. All processing happens in your browser.

4

Download the result

Once complete, click 'Download' to save your converted file.

Why choose our MP4 converter?

Quality, speed, and security for all your conversions.

High-quality conversion

We guarantee precise file conversion without any loss of quality.

Multiple formats supported

Convert between dozens of different file formats with ease.

Compatible with all devices

Works on any device — computer, tablet, or smartphone.

100% browser-based

Your files never leave your device. All processing happens locally.

Fast processing

Convert files in seconds with our optimized conversion engine.

No registration required

Start converting immediately. No sign-up or account needed.

Convert MP4 to Other Formats

MP4GIFMP4MP3MP4WAVMP4WebM

Convert to MP4: Supported Formats

GIFMP4MKVMP4MOVMP4WebMMP4AVIMP4

Frequently Asked Questions

How do I convert video to MP4 for free?
Simply drag and drop your video file or click 'Choose Files' to upload. Select MP4 as the output format and click convert. The conversion happens instantly in your browser — no software installation required.
Is FastConvert MP4 converter really free?
Yes, completely free with no hidden fees. There's no registration, no watermarks, no subscription, and no file size restrictions besides the 1GB limit.
Are my video files uploaded to your servers?
No, your files never leave your device. FastConvert uses browser-based technology to process video entirely on your computer or phone, ensuring complete privacy and security.
What video formats can I convert to MP4?
We support converting MKV, MOV, WebM, AVI, FLV, M4V, and more to MP4. We also support converting MP4 to other formats like WebM, MKV, GIF, MP3, and WAV.
Will converting to MP4 reduce video quality?
MP4 uses efficient compression with minimal quality loss. FastConvert preserves the original quality as much as possible, with smart encoding that balances file size and visual quality.
What's the maximum file size I can convert?
You can convert video files up to 1GB. Since processing happens locally in your browser, performance depends on your device's capabilities and the video's length.
Can I extract audio from MP4 files?
Yes. You can convert MP4 videos to audio formats like MP3, WAV, AAC, and OGG. The audio track will be extracted and saved as the chosen audio format.
Do I need to install software to convert MP4?
No installation required. FastConvert works directly in your web browser on Windows, Mac, Linux, iOS, or Android. Just open the page and start converting.

.MP4

MPEG-4 Video

CategoryVideo
Converters9 available

What is the MP4 file format?

MP4 is the most popular video container format, supported by virtually all devices and platforms. It offers excellent compression with H.264/H.265 codecs, making it ideal for streaming, sharing, and storage.

Other Video Formats

MKVMOVWebMAVI