Browser-based video resolution tool using ffmpeg.wasm. Choose from presets like Full HD, HD, 480p, or specify custom sizes.
Perfect for size adjustment for SNS posts, web optimization, mobile device playback optimization, and various other purposes.

Main Use Cases

Size adjustment for SNS posts

Web optimization

Mobile device playback optimization

Storage space saving

YouTube and video platform uploads

Email attachment size adjustment

Presentation videos

Online learning content

Digital signage videos

Archive video compression

Q&A

Is the aspect ratio preserved?

Presets preserve the aspect ratio. Custom settings allow free width and height specification, but may cause video stretching.

What can this be used for?

Size adjustment for SNS posts, web optimization, mobile device playback optimization, storage space saving, and more.

Will the video quality degrade?

Lowering resolution may cause slight quality loss, but high-quality encoding minimizes this. Increasing resolution may improve quality.

Does it work on mobile devices?

Yes. It works on mobile browsers including iPhone and Android. *Some OS or browser versions may not be supported.