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OnlyCompress

Online Video Compressor

Compress MP4, MOV, AVI, MKV, WMV, WebM, and other common video formats for free. Quickly reduce file size while maintaining good video quality.

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Select Video Files

Drag and drop video files onto this page, or use Paste (Ctrl + V / ⌘ + V) to import them quickly

Smallest File Balanced Best Quality

Video Compression Guide

  1. What Are Video Formats?

    MP4, MOV, AVI, MKV, WMV, and WebM are common video file formats. They differ in container structure, codec compatibility, and typical use cases. Video files generally contain video streams, audio streams, and other media information. Actual video quality and file size depend mainly on factors such as the video codec, bitrate, resolution, and frame rate.

  2. Why Compress Videos?

    High-definition videos, 4K footage, and videos recorded on smartphones can take up considerable storage space. Compressing videos can reduce file size while preserving as much quality as possible, making uploads and sharing faster, saving storage space, and improving playback performance.

  3. How to Compress Videos
    • Click the Select Video Files button or simply drag and drop your videos onto the page.
    • Choose a compression mode: Smallest File, Balanced, or Best Quality.
    • Click Compress to start compressing your videos and reduce their file size.
  4. When Should You Compress Videos?
    • Social Media Sharing

      Platforms such as Instagram, X (Twitter), Facebook, TikTok, and YouTube may impose file size limits or benefit from faster uploads. Compressing videos can help speed up the upload process.

    • Videos Recorded on Mobile Devices

      HD and 4K videos recorded on smartphones can be large. Compressing them saves storage space and makes sharing easier.

    • Email and File Transfers

      Email services and messaging apps often limit attachment sizes. Compressing videos makes them easier to send to clients, colleagues, and friends.

    • Website Video Optimization

      Smaller video files can load faster, helping improve user experience and page performance.

    • Online Courses and Training

      Long instructional videos can consume significant bandwidth. Compression helps reduce data usage and improve playback performance.

    • Cloud Storage Management

      Compressing videos reduces local storage requirements and can lower cloud storage costs.

    • Business and Team Collaboration

      Compressed product demonstrations, meeting recordings, and training videos are easier to share and view online.

    • Marketing Videos and Advertising

      Reducing video file size can shorten loading times and improve the viewing experience.

    • CDN and Bandwidth Optimization

      Video compression reduces data transfer volumes, helping lower CDN costs and bandwidth usage.

    • Video Platform Upload Limits

      Some platforms impose video file size limits. Compressing videos can help meet these requirements.

  5. Privacy and Security
    • Local Processing — Files stay on your device and are processed directly in your browser.
    • No File Uploads — Your files are not sent to a server for processing, helping protect your privacy.
    • Privacy-Focused — We do not view, store, or collect your file data.
    • No Registration Required — Start compressing videos right away without creating an account.
    • Original Files Remain Unchanged — Compressed videos are saved as new files, leaving your original files intact.