Free video resizer · 100% in your browser

Video Resizer . Resize any video for every platform

This free video resizer fits your video to the exact resolution each platform wants, with bars (contain) or full-frame (fill). Everything runs on your device, no upload.

How to resize a video online (free video resizer)

1
Import your video
Drop your file. It stays on your device, nothing is uploaded.
2
Pick a size and fit
Choose the target resolution (TikTok, square, portrait, YouTube) and the mode: contain (bars) or fill (full frame). A full video resize takes seconds.
3
Get your MP4
Run the resize and save the video at the right size, ready to post.

Frequently asked questions

What’s the difference with cropping?

Cropping reframes the image to a ratio while keeping its resolution. Resizing fits the video to a precise target resolution (e.g. 1080×1920), adding bars or filling the frame.

Contain or fill, which one?

“Contain” keeps the whole image and adds bars if needed (nothing is cut). “Fill” covers the entire frame and crops the overflow. Pick based on whether you want to keep everything or a full-screen look.

Does the processing happen online?

No, everything runs in your browser, on your device. Your video is never sent to a server.

Which resolutions are available?

1080×1920 (9:16 for TikTok/Reels/Shorts), 1080×1080 (square), 1080×1350 (4:5 portrait) and 1920×1080 (16:9 for YouTube). The result is an MP4 ready to post.

Is this really a free video resizer?

Yes, no account, no watermark, no fee. This video resizer runs entirely in your browser, so there's no limit on how many times you resize a video.