Compress Video

Compress and resize video files to reduce file size while maintaining quality. Choose from preset compression levels or customize advanced settings for optimal results. All processing happens in your browser for complete privacy.

Overview

This browser-based video compressor uses FFmpeg via WebAssembly to shrink MP4, MOV, MKV, WebM, AVI, and other formats by 50–80% without sending a single byte to a server. Pick from four ready-made presets — web, mobile, archive, or high-quality — or dial in an exact bitrate, resolution (down to 360p), and output format yourself. Because every encode runs locally on your CPU, your footage stays private: no cloud processing, no account, no file-size throttling tied to a subscription tier.

Key Features

  • Compress video files to reduce size
  • Resize video dimensions
  • Multiple compression presets for different use cases
  • Advanced settings for technical users
  • Support for multiple video formats
  • Real-time compression preview
  • Batch processing support
  • Quality vs size optimization
  • Custom bitrate and resolution settings
  • Completely private - no uploads

Common Use Cases

  • Shrink Videos for Email or Messaging — Reduce an MP4 below attachment limits without re-encoding on a third-party server.
  • Optimize Footage for Social Media — Use the web preset to hit platform bitrate targets for YouTube, Instagram, or TikTok uploads.
  • Free Up Storage Space — Batch-compress a library of recordings to the archive preset, keeping acceptable quality at a fraction of the original size.
  • Downscale for Mobile Playback — Apply the mobile preset and a 720p or 480p resolution cap so videos stream smoothly on low-bandwidth connections.
  • Privacy-Sensitive Content — Compress confidential screen recordings or meetings locally so the footage never touches an external server.

How It Works
1

Upload Your Video Files

Select one or multiple video files from your device. Supports drag & drop and batch processing for multiple files at once.

2

Choose Compression Settings

Select from preset compression levels (web, mobile, archive, high-quality) or customize advanced settings like bitrate, resolution, and codec options.

3

Download Compressed Videos

Your compressed videos are processed locally in your browser and ready for download with significantly reduced file sizes.

Frequently Asked Questions

How much can I reduce my video file size?
File size reduction depends on your original video and settings chosen. Typically, you can achieve 50-80% size reduction while maintaining good quality. Web preset offers the best compression ratio, while high-quality preset preserves maximum visual fidelity.

What video formats are supported for compression?
We support all major video formats including MP4, WebM, AVI, MOV, MKV, WMV, FLV, M4V, and 3GP for input. Output formats include MP4, WebM, AVI, and MOV.

Is there a file size limit for video compression?
The maximum file size is 1GB per video. For larger files, consider using our video splitter tool first, or compress in smaller batches.

How long does video compression take?
Processing time varies from 1-30 minutes depending on your video file size, original quality, and compression settings. Larger files and higher quality settings take longer to process.

Are my videos uploaded to your servers?
No, all video compression happens directly in your browser using WebAssembly technology. Your files never leave your device, ensuring complete privacy and security.

Can I compress multiple videos at once?
Yes, our tool supports batch processing. You can select multiple video files and apply the same compression settings to all of them simultaneously.

What's the difference between compression presets?
Web preset optimizes for streaming and social media with smaller file sizes. Mobile preset creates very small files for mobile devices. Archive preset balances size and quality for storage. High-quality preset minimally compresses while preserving visual quality.

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