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Resize MP4 Video

Resize MP4 videos quickly while maintaining good quality Files never leave your device — all processing happens locally in your browser Free to use online, no registration or installation required

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Select MP4 Video

Drag & drop MP4 videos onto this page, or use Paste (Ctrl + V / ⌘ + V) to import them instantly.

💡 For the best experience, please open this page in your system browser.

视频尺寸设置

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请设置视频宽高↑
填充模式
背景颜色
💡 建议视频输出尺寸不超过 1920×1920
💡 部分视频格式不支持预览
开始处理

User Guide

  1. Why Resize a Video?

    Different platforms, devices, and applications require different video resolutions. Resizing your video improves compatibility with social media, websites, mobile devices, and video editing software, while also helping reduce file size in many cases.

  2. How to Resize a Video
    • Click the Select Video button, or drag and drop an MP4 video onto the page.
    • Select your desired output size.
    • Choose a fit mode (Scale or Crop).
    • Select a canvas color if needed.
    • Choose the output format (MP4 or MOV).
    • Click the Start Resizing button to process the video.
    • Click Save to download the resized video.
  3. When Do You Need to Resize an MP4 Video?
    • Social Media Uploads

      Resize MP4 videos to match the recommended resolutions for TikTok, Instagram, YouTube, Facebook, and other platforms.

    • Mobile Playback

      Resize MP4 videos for smartphones and tablets to provide a better viewing experience.

    • Web Videos

      Optimize MP4 video dimensions for embedding on websites, improving loading speed and user experience.

    • Video Editing

      Standardize MP4 video resolutions to simplify editing, compositing, and exporting.

    • Save Storage Space

      Reducing video resolution appropriately can decrease file size, saving storage space and making sharing faster.

  4. Privacy & Security
    • 100% Local Processing — Your files never leave your device. All resizing is performed securely in your browser.
    • No File Uploads — Your videos are never sent to any server.
    • Privacy First — We never view, store, or collect any of your files or data.
    • No Registration Required — Open the tool and start resizing instantly.
    • Original Files Stay Safe — A new resized video is created, and your original file remains unchanged.