Free MP4 CompressorCompress Videos Locally in Your Browser

Compress MP4, MOV, and WebM videos without uploading files. Fast, secure, and keeps original format.

Drag & drop your video here

Supports MP4, MOV, WebM, MKV, MPEG-TS and more

What is MP4 Compressor?

MP4 Compressor is a free online tool that compresses video files directly in your browser. Unlike other video compression tools, we don't upload your videos to a server - all processing happens locally on your device. This means your videos stay private and the compression is faster since there's no upload time.

How It Works

  1. Select your video file (MP4, MOV, or WebM format)
  2. Choose your compression preset or target file size
  3. Click "Start Compression" to begin processing
  4. Download your compressed video when complete

Features

  • Privacy First: No file uploads - everything happens in your browser
  • Fast Compression: Modern browser-based processing using Mediabunny
  • Format Preservation: Output format matches input (MP4 stays MP4)
  • Quality Control: Adjust quality or target specific file sizes
  • Free & Unlimited: No restrictions on file size or number of compressions
  • Cross-Platform: Works on Windows, Mac, and Linux

Why Use MP4 Compressor?

Video files can be large, making them difficult to share via email, messaging apps, or social media platforms. MP4 Compressor reduces file size while maintaining acceptable quality for most use cases.

Common use cases include:

  • Reducing video size for Discord uploads (8MB limit)
  • Compressing videos to fit email attachment limits
  • Creating smaller files for web uploads and streaming
  • Saving storage space on your device

Compression Tools

🌐

Online Compressor

Compress videos with quality-based presets for optimal size/quality balance.

📦

Compress to 10MB

Automatically compress any video to exactly 10MB using 2-pass compression.

💬

Discord Compressor

Compress videos to Discord's 8MB limit for easy sharing.

🪟

Windows Compressor

Local video compression optimized for Windows 11.

Frequently Asked Questions

Is MP4 Compressor free to use?
Yes, MP4 Compressor is completely free with no limitations on file size or number of compressions.
Do you upload my videos to a server?
No. All compression happens locally in your browser using JavaScript. Your videos never leave your device.
What video formats are supported?
We support MP4, MOV (QuickTime), and WebM formats for both input and output.
How does the compression work?
We use the Mediabunny library to compress videos by adjusting video bitrate, resolution, and audio quality while maintaining the original format.
Will compression reduce video quality?
Compression reduces file size by lowering video bitrate. The quality loss is minimal for most use cases, and you can choose quality presets to balance size and quality.
Can I compress a video to a specific file size?
Yes! Use our "Compress to 10MB" or "Discord" tools which use 2-pass compression to hit exact file size targets.
Does this work on mobile devices?
Yes, the tool works on any modern browser including Chrome, Firefox, Safari, and Edge on both desktop and mobile.
Why use browser-based compression vs desktop software?
Browser compression is faster for small to medium files (no upload time), more secure (files stay local), and works on any device without installation.