Resize a video / change resolution, free

Resize a video in three steps

Drop your video, pick a resolution preset, and download — in your browser.

Nothing uploads

The file never leaves your device.

When you’d want this

Platform upload limits are the most common reason. Twitter/X caps uploads at 1080p; Instagram Reels are 1080p natively. Going from 4K to 1080p cuts file size by 70–80% while still looking sharp on any normal screen.

The other common case is making a smaller proxy to edit in a lighter app — work on the small version, then re-export from the original when you’re done.

What stays the same

The aspect ratio is preserved — a 16:9 clip stays 16:9 at any preset, no letterboxing or cropping. The audio track, frame rate, and color profile are all carried through unchanged. Re-encoding is required for a resize, so the output is H.264 MP4 (the universal fallback codec).

Resolution presets

Preset	Pixels	Typical use
1080p	1920×1080	Social, streaming, most screens
720p	1280×720	Faster uploads, older devices
480p	854×480	Small embeds, low-bandwidth
360p	640×360	Preview clips, tiny files

Common pitfalls

Resizing up is usually a mistake — a 360p source scaled to 1080p has no extra detail to fill in and will look blurry or blocky, while being a much larger file. Only downscale from a higher-resolution original.

If the source has a non-standard aspect ratio (vertical phone video is typically 9:16, for example), the output will match that ratio at the chosen preset height. A “1080p” vertical video will be 1080 pixels tall, not wide — the tool scales to fit the shorter dimension. For precise control over output dimensions, use a full video editor.

Privacy

The resize runs in your browser via WebAssembly. Your video never leaves your device — no upload, no server, no account. Watch your browser’s network panel while it runs: no outgoing requests carry your video data.

Smaller file too?

Lower resolution shrinks the file; for a specific target size, re-encode at a lower bitrate.