Resize & rotate video
Scale a video to a new resolution — including square and portrait 9:16 crops for social formats — and rotate it in 90° steps to fix sideways clips. Re-encoded entirely in your browser; nothing is uploaded.
Open Resize & rotate video →What is Resize & rotate video?
A free, private tool that changes a video's resolution and orientation entirely in your browser. Scale an MP4, MOV, WebM or MKV down to Full HD, HD, 480p or a custom social format — including 1080 × 1080 square and 1080 × 1920 portrait, with contain, cover or stretch fitting — and rotate the picture in 90° steps to fix clips that were filmed sideways. The rotation is baked into the frames, so the result plays the right way up in every player. Processing uses the browser's WebCodecs engine on your device; nothing is uploaded.
How to use Resize & rotate video
- Load a video — Drop the file onto the tool or click to choose it. The current resolution is shown under the preview.
- Pick a size — Choose a target width, or one of the square / portrait presets for social formats — then pick how the picture should fit (letterbox, crop or stretch).
- Set rotation if needed — Choose 90° clockwise, 180° or 90° anti-clockwise to fix a sideways or upside-down clip.
- Apply and download — Click Apply & save, preview the result and download the MP4 or WebM.
Frequently asked questions
Is my video uploaded to a server?
No. Resizing and rotation run inside your browser with WebCodecs — the tool works offline.
Why does my phone video play sideways in some apps?
Phones often store rotation as a metadata flag that some players ignore. This tool re-encodes with the rotation baked into the actual frames, so every player shows it correctly.
What do contain, cover and stretch mean?
When the target shape differs from the source: contain letterboxes the whole picture inside the frame, cover fills the frame and crops the overflow, stretch distorts the picture to fit exactly.
Does resizing lose quality?
The video is re-encoded once at the new size. Downscaling looks essentially transparent; upscaling adds no real detail, so scaling up is rarely worth it.
Tips
- Use cover fit for square and portrait presets — it fills the frame the way social apps do.
- Downscale to 1280 px wide before sharing screen recordings — a fraction of the size, still sharp on phones.
- Combine with the Video trimmer first so you only re-encode the part you keep.