How to resize a video
- Drop your landscape footage, stream highlight, or camera clip into the tool.
- Select a canvas preset, such as 9:16 (1080×1920) or 4:5 portrait (1080×1350).
- Pick your fit style: Blurred background, Black bars, or Crop to fill.
- Render your resized MP4 and download it directly to your device or camera roll.
Repurposing widescreen content for vertical social feeds
Transforming horizontal 16:9 gaming sessions, studio podcasts, or YouTube videos into vertical 9:16 content is essential for reaching audiences on short-form feeds. Posting raw horizontal clips with tiny letterboxing gets overlooked, while re-framing them ensures your content fills mobile screens properly.
The default Blurred background mode keeps your full widescreen video visible in the center while filling upper and lower empty space with an aesthetic, zoomed blur of your footage. This creates a polished, high-production look popular among podcast clippers and game highlight channels.
Selecting the ideal framing style for your edit
Different types of video demand different framing approaches. If your footage has crucial action happening edge-to-edge, such as gameplay HUDs or multi-person interviews, Blurred background or Black bars preserves the full horizontal frame without sacrificing visual information.
For solo talking-head clips, reaction takes, or centered product demonstrations, Crop to fill zooms into the center of the frame to occupy every pixel of the 1080×1920 canvas. Excess side footage is trimmed away, delivering an immersive full-bleed vertical experience.
Streamlined local encoding and audio preservation
The conversion engine recompresses video frames into clean H.264 video while passing existing AAC audio through untouched. This preserves crisp vocal clarity, punchy background beats, and sound effects without introducing any generational loss or audio sync errors.
Rendering executes entirely in your browser using single-threaded WebAssembly ffmpeg, keeping your unreleased video drafts off remote hosting servers. Exported clips are tagged with dimensions like clip-1080x1920.mp4, ready for immediate social uploading.
Questions
Which preset should I use for Instagram and Facebook feed posts?
Use 4:5 (1080×1350) for portrait feed posts to maximize screen real estate, or 1:1 (1080×1080) for traditional square posts.
Does the Blurred background mode slow down playback?
No. The blurred background is baked into the video frames during encoding, outputting a standard H.264 MP4 that plays smoothly on all devices.
Will my horizontal 4K video lose clarity when converted to 1080×1920?
The video is scaled proportionally to fit the 1080-pixel width or height, maintaining crisp 1080p resolution matching social platform upload standards.
Can I resize short clips directly on my phone?
Yes. The tool runs locally in modern mobile web browsers, allowing you to reformat clips directly from your mobile camera roll.