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Video Resizer Online Free — PrivaTools

TL;DR: Upload a video and pick a target width (height auto-scales to preserve aspect ratio) — H.264 MP4 output.

Resize video resolution online for free — change video dimensions to 720p, 1080p, square, vertical, or custom sizes while preserving quality. Free FFmpeg-powered tool.

Video Resizer is part of PrivaTools — a free, open-source alternative to iLovePDF, Smallpdf, and Adobe. Server-side tools process your file in an isolated container and discard it immediately; many tools never upload at all and run entirely in your browser.

How to Use Video Resizer

  1. Upload a video — MP4 / MOV / MKV / WebM up to 500 MB.
  2. Choose preset — 480p (SD), 720p (HD), 1080p (Full HD), 1440p (QHD), 2160p (4K).
  3. Download the resized video — FFmpeg scales the video to the target height while preserving aspect ratio.

Frequently Asked Questions

Will upscaling improve quality?

No — upscaling can't add detail. Use it to match a target resolution, not to improve quality.

Does this re-encode the audio?

Audio is copied unchanged when possible (saves time, no quality loss).

Can I crop to a different aspect ratio?

Not directly — the resizer preserves aspect ratio. For aspect-ratio crops, use a video editor.

Last reviewed 2026-05-01 by the PrivaTools maintainers. Source code on (MIT-licensed, self-hostable).

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