FFmpeg Video Tool

A powerful browser-based video processing tool that runs FFmpeg entirely on your computer using WebAssembly. No uploads, no server processing - your videos stay private and secure.

Features

📦 Format Conversion

Convert between popular video formats:

• MP4 - Universal compatibility
• WebM - Web-optimized format
• AVI - Classic video format
• MOV - QuickTime format

🗜️ Compression & Quality

Optimize your videos for different use cases:

• Compress for Web - Balanced quality and file size for web publishing
• High Quality - Maximum quality with H.264 encoding
• Small File Size - Aggressive compression for minimal file size

✂️ Video Editing

Simple editing operations:

• Resize - Scale to 1080p, 720p, or 480p resolution
• Rotate - Rotate video 90 degrees clockwise
• Trim - Cut first 30 seconds of video

🔊 Audio Operations

Manage audio tracks:

• Extract Audio - Save audio as MP3
• Remove Audio - Create silent video
• Boost/Lower Audio - Adjust volume by ±6dB

How It Works

This tool uses FFmpeg.wasm, a complete port of the FFmpeg multimedia framework to WebAssembly. All processing happens directly in your browser:

1. Privacy First - Your videos never leave your device
2. No Upload Limits - Process files up to 2GB (browser memory limit)
3. First Use - Downloads ~22MB FFmpeg library (cached for future use)
4. Processing Time - Expect 20-50x slower than desktop FFmpeg

Usage Tips

Performance Expectations

• Small files (under 50MB): Processing takes 1-5 minutes
• Medium files (50-500MB): Processing takes 5-30 minutes
• Large files (over 500MB): Processing may take 30+ minutes

For best results, work with files under 500MB. Large files can be processed but will take significant time.

Format Compatibility

Input formats supported:

• MP4, MOV, AVI, MKV, WebM
• FLV, WMV, MPEG, 3GP
• Most common video codecs (H.264, H.265, VP8, VP9, etc.)

Browser Compatibility

Works in all modern browsers:

• ✅ Chrome/Edge (recommended)
• ✅ Firefox
• ✅ Safari
• ✅ Opera

This tool uses the single-threaded version of FFmpeg.wasm, so no special server configuration is required.

Troubleshooting

Video Won't Load

• Ensure file is under 2GB
• Check that file is a valid video format
• Try using a different browser

Processing Failed

• Video might use unsupported codec
• File might be corrupted
• Try converting to MP4 first as a baseline

Browser Crashes or Freezes

• File is too large for available memory
• Close other tabs/applications
• Try processing on a device with more RAM

Slow Processing

This is normal! WebAssembly FFmpeg is significantly slower than native desktop FFmpeg. For large files or frequent processing, consider using desktop FFmpeg instead.

Technical Details

• Library: FFmpeg.wasm v0.12.10
• Architecture: Single-threaded WebAssembly
• Memory Limit: 2GB maximum file size
• Storage: Files processed in browser memory (no disk I/O)
• Security: Sandboxed iframe with script permissions only

Try It Now

Alternative: Desktop FFmpeg

For production workflows or large files, consider installing FFmpeg on your desktop:

# macOS (via Homebrew)
brew install ffmpeg

# Windows (via Chocolatey)
choco install ffmpeg

# Linux (Ubuntu/Debian)
sudo apt install ffmpeg

Desktop FFmpeg is 20-50x faster and has no file size limits, but requires command-line knowledge. This browser tool is perfect for occasional use, learning, or when you need quick conversions without installing software.