Resize your video for TikTok

Turn any clip into a full-screen vertical TikTok. It runs in your browser, so your video stays on your device.

or drop it here

Up to 720p · no watermark

Editing on your phone?

The ClipSizer app for Android is on its way.

Coming soon to Google PlayEmail me when it's out

Choose your video
Drop in a clip from your phone or computer. Wide, square or tall all work.
Frame it for TikTok
TikTok's 9:16 shape is already picked. Fill the screen and drag to choose what stays in, or keep it all over a blurred background.
Save and post
Download your vertical video and post it on TikTok. Up to 720p, no watermark.

Source: official help page, checked Oct 2026

Do you upload my video to TikTok or anywhere else?

No. It never leaves your device. You post the finished file to TikTok yourself.

Does it work on iPhone?

Yes, in Safari on recent iPhones. Very long or 4K clips can be too much for a phone browser, so try a shorter clip or use a computer.

Will my video lose its edges?

Only if you choose Fill, which crops to fill the screen. Drag the preview to pick what stays in. Fit and Blur keep the whole picture.

What size is the finished video?

720 × 1280, which is TikTok's 9:16 shape. There's no watermark.