Compress MP4 Video
Compress MP4 videos online with quality and resolution controls. Processing stays in your browser, so private videos are never uploaded
Drop your files here
Click to choose a file
Supported format: MP4
Up to 3 files and 100 MB total per batch
Up to 50 MB per file
Compress MP4 video files for email, messaging apps, websites, and upload limits without sending the footage to a server. Choose Clear, Balanced, or Smallest file quality and set a maximum resolution. JustFileKit re-encodes the video locally in your browser, so private recordings stay on your device.
Three steps: drop in one or more MP4 files, choose the quality and maximum resolution, then process and download. Lowering resolution usually saves more space than lowering quality alone, though it removes visual detail. Longer and higher-resolution videos take more time. Multiple results are processed one at a time and packaged as a zip without overwriting the originals.
Frequently asked questions
- How can I make an MP4 as small as possible?
- Choose Smallest file and lower the maximum resolution to 720p or 480p. Lower resolutions usually reduce size the most, at the cost of visible detail.
- Does MP4 compression reduce video quality?
- Yes. Re-encoding can remove detail. Clear prioritizes quality, Balanced suits everyday sharing, and Smallest file prioritizes size.
- Is my video uploaded?
- No. Decoding, resizing, and encoding all run locally in your browser, so the video never leaves your device.
- Which files and sizes are supported?
- The tool currently accepts MP4 files up to 50 MB each and can process up to 50 files in a batch. Speed depends on video length, resolution, and device performance.