Convert WebM to MP4 Online

Transform WebM files into MP4 format instantly. Ensure compatibility across all Apple devices and standard media players.

Drag & drop file or Browse Files

Target Format

Select the format you want to convert this video into.

Universal Format to Anything

Convert WebM to MP4 Online

Transform WebM files into MP4 format instantly. Ensure compatibility across all Apple devices and standard media players.

ffmpeg_worker.log
[INFO] Starting video remuxing...
[DATA] Found H.264 stream...
[WARN] Transcoding to WebM VP9
_

Container Output

WebCodecs GPU

Apple Compatibility

WebM files often fail to play on iPhones and Safari. Converting to MP4 fixes this instantly.

No FFmpeg installation
Preserves original quality
Supports 4K and 60FPS

Play Anywhere, On Any Device

By converting your videos to MP4 (H.264/AAC), you ensure they will play flawlessly on iPhones, Androids, Smart TVs, and social media platforms.

How to Convert Videos Offline

Drop your Video

Select any obscure video format from your local drive.

Choose Target

Select MP4 for universal playback or WebM for web optimization.

Save File

The conversion happens locally. Click download when done.

100% Local Execution

No accounts, no software installation, and no upload limits. Just drag, drop, and convert.

Offline Security

  • Prevent video leaks
  • Safe for private media
  • Absolute privacy

Frequently Asked Questions

Q: Why convert WebM to MP4?

A: WebM is optimized for the web (specifically Chrome/Firefox), but lacks native playback support on iOS and macOS devices. MP4 solves this.

Q: Is there any quality loss?

A: Our intelligent encoder maximizes quality retention while compressing into the highly efficient H.264 format.

Q: Are there file size restrictions?

A: No, all processing happens locally on your machine, so you are only limited by your device's RAM.