Resize Video for TikTok
TikTok plays full screen in 9:16, so anything else gets bars or gets cropped. Resize your video to 1080×1920 here. Everything runs on your device, nothing is uploaded.
How to resize a video for TikTok (9:16, 1080×1920)
- 1
Import your video
Drop your file. It stays on your device, nothing is uploaded.
- 2
Pick the 9:16 preset
Choose 9:16, that’s 1080×1920, TikTok’s full-screen size. Then pick your fit: fill to cover the whole frame, or contain to keep the entire image with bars.
- 3
Get your MP4
Run the resize and save a 1080×1920 file, ready to upload to TikTok.
Right size, then the edit.
Once your video fits the platform, Montaj adds subtitles, cuts the silences and cleans up the sound. Automatically, on your device, no cloud.
Frequently asked questions
What size should a TikTok video be?
1080×1920 pixels, a 9:16 vertical ratio, that’s the full-screen canvas TikTok is built around. Pick the 9:16 preset here and you get exactly that.
Fill or contain for TikTok?
Fill, in most cases. TikTok plays edge to edge, so bars baked into the file stay visible and waste screen. Choose contain only when cropping would cut something you can’t lose.
My video is 16:9, what happens on TikTok?
A landscape video sits as a small strip in the middle of a vertical screen. Resizing to 9:16 with fill crops the sides and gives you a full-screen clip instead.
Is my video uploaded to a server?
No. The resize runs entirely in your browser, on your device. Your video is never sent anywhere.
Does resizing add a watermark?
No watermark, no account, no fee. You get a clean MP4 at the size you picked.