BYTETOOLS

Resize Video

Resize video resolution online for free. Scale videos to 1080p, 720p, 480p, 360p or a custom width in your browser — nothing is uploaded.

Drop a video here or click to browseYour video is processed locally and never uploaded.

What is the Resize Video?

The ByteTools Resize Video tool changes a video's resolution to a preset like 1080p, 720p, 480p or 360p, or to any custom width you enter.

  • Presets for 1080p, 720p, 480p and 360p
  • Custom width option for exact sizing
  • Keeps the aspect ratio automatically
  • Outputs a standard, compatible MP4
  • 100% local — your video is never uploaded
  • Free, unlimited and works offline once loaded

How to use the Resize Video

  1. 1

    Drop a video onto the box or click to browse for one.

  2. 2

    Pick a resolution preset or choose Custom width and type a value.

  3. 3

    Click Resize video and wait for the in-browser engine to finish.

  4. 4

    Preview the resized result, then download it.

About the Resize Video

The ByteTools Resize Video tool changes a video's resolution to a preset like 1080p, 720p, 480p or 360p, or to any custom width you enter. Scaling down is the easiest way to shrink a file, meet an upload limit, or match the dimensions a platform expects.

The height is calculated automatically to preserve the original aspect ratio, so your video never looks stretched or squashed. It re-encodes with H.264 and AAC for a compatible MP4, making it ideal for social clips, previews and space-saving copies.

All processing happens locally in your browser with a WebAssembly build of ffmpeg. Your video is never uploaded — no server, no account and no limits — so your files stay private and the tool works offline once it has loaded.

Frequently asked questions

How do I change a video's resolution?

Drop your video onto the tool, choose a preset like 720p or enter a custom width, then click Resize video. The height is set automatically to keep the aspect ratio, and you get a resized MP4 to preview and download.

Does resizing a video reduce the file size?

Scaling down to a smaller resolution usually reduces the file size significantly because there are fewer pixels to encode each frame. Combining a lower resolution with compression shrinks files even more.

Will resizing stretch or distort my video?

No. Only the width is set and the height is calculated to preserve the original aspect ratio, so the picture keeps its proportions. Your video stays correctly shaped, just at a different size.

Is my video uploaded to resize it?

No. All resizing happens in your browser with WebAssembly, so your video is processed on your own device and never uploaded. Private footage stays on your machine.

Why is resizing slow for large videos?

Resizing re-encodes every frame using your own CPU rather than a server, so short clips are quick but long or high-resolution videos take time. A modern desktop browser is recommended for large files.

Guides for Resize Video

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