March 23, 20263 min read

Video Converter Online Free — MP4, AVI, MKV, MOV, WebM

Convert videos between formats instantly. Free online video converter supports MP4, AVI, MKV, MOV, WebM, WMV, FLV. No installation needed.

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Convert Any Video Format to Any Other

Got a video your device can't play? MyPDF's Video Converter converts between all major video formats — MP4, AVI, MKV, MOV, WebM, WMV, FLV, and 3GP.

Supported Conversions

From	To	Common Use Case
MKV	MP4	Play MKV files on phones/tablets
MOV	MP4	Convert iPhone videos for sharing
AVI	MP4	Modernize old AVI recordings
WMV	MP4	Convert Windows Media files
FLV	MP4	Convert old Flash videos
WebM	MP4	Convert web videos for editing
MP4	AVI	Legacy device compatibility
MP4	WebM	Web-optimized video
3GP	MP4	Convert old phone videos

How to Convert a Video

Step 1: Upload Your Video

Open the converter (e.g., MKV to MP4) and upload your video file.

Step 2: Choose Output Format

Select your target format. MP4 (H.264) is the most universally compatible choice.

Step 3: Convert and Download

Click "Convert" and download your converted video.

Which Format Should You Choose?

MP4 — Best for everything. Universal compatibility, good compression, plays everywhere
WebM — Best for web/HTML5 video. Smaller than MP4, but limited device support
MKV — Best for archiving. Supports multiple audio/subtitle tracks
MOV — Best for Apple ecosystem and professional editing
AVI — Legacy format. Use only if required by old software/hardware

Tips

Always convert to MP4 when unsure — it's the safest choice for compatibility
MOV from iPhone? — Convert to MP4 with MOV to MP4 for universal sharing
Need to compress too? — Use Compress Video after converting, or convert to a more efficient format
Extract audio only — Use MP4 to MP3 instead of converting the full video
Need a GIF? — Use Video to GIF for short animated clips

Frequently Asked Questions

Does conversion reduce quality?

Some quality loss may occur when re-encoding, but it's minimal at standard settings. Converting between containers (e.g., MKV to MP4 when codecs match) can be lossless.

How long does conversion take?

Most conversions complete in seconds to a few minutes depending on file size and format.