Video Resolution Converter Online — 360p to 1080p
Resize video to 360p, 480p, 720p or 1080p locally and export MP4.
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About this tool
Choose a target video height and the converter calculates an even output width that retains the source aspect ratio before encoding an H.264 MP4.
How to use
- Choose a supported video smaller than 200 MB.
- Select the output option, then start local processing.
- Preview and download the new video before closing the page.
Features
- 360p, 480p, 720p and 1080p presets.
- Aspect ratio preserved automatically.
- Even dimensions for compatible H.264 output.
Common use cases
- Create a 720p sharing copy.
- Standardize clips to a common height.
- Downscale high-resolution footage for faster transfer.
Common issues and tips
- Choosing a target above the source resolution upscales pixels but cannot add real detail.
- Changing resolution requires re-encoding and can reduce quality.
Privacy
The video is processed locally in your browser with FFmpeg WebAssembly and is not uploaded to Tools12345.
Frequently asked questions
Is the aspect ratio preserved?
Yes, width is calculated from the selected height.
Does 1080p improve a 480p source?
No, upscaling cannot restore missing detail.
Which output format is used?
The result is H.264 MP4 with optional AAC audio.