How to Resize Video for TikTok
Make your own video fill the TikTok screen by resizing it to 9:16. A simple, safe guide with a free browser-based resizer and the right dimensions.
TikTok is a full-screen vertical experience. A video that is not shaped for it gets bars or crops, which makes your content look out of place next to native clips. Resizing to the correct 9:16 shape fixes that.
Here is how to resize a video you own for TikTok using the free Video Resizer, plus the exact dimensions to target.
TikTok's ideal dimensions
TikTok uses 9:16 vertical at 1080 × 1920 pixels. That fills the screen on most phones without bars.
See best video format for TikTok for codec and format details that pair with these dimensions.
Choose your fit
- Crop to fill for an edge-to-edge look.
- Fit with padding when you must keep the entire frame visible (for example, on-screen text near the edges).
Resize in your browser
- Open the Video Resizer.
- Add your file.
- Select the 9:16 (1080 × 1920) preset.
- Process and download.
No upload happens, the tool works locally in your browser.
Leave room for the interface
TikTok overlays buttons and captions on the right and bottom of the screen. Keep important visuals and text away from those zones so the interface does not cover them. Centering your subject is the safest choice.
Double-check the output
Confirm the result is 1080 × 1920 using the Metadata Checker, then preview it before posting. If you are repurposing the same clip elsewhere, the 9:16 conversion guide covers other platforms too.
Plan around the safe zones
TikTok stacks interface elements on top of your video: the caption and username sit along the bottom left, and the like, comment, share, and profile buttons run up the right edge. Sounds and effect labels appear near the top. Before you resize, picture those overlays as a frame around your usable space. Keep titles, logos, and the main subject inside the central column, roughly the middle 60 percent of the width and away from the bottom third. If your footage has text baked in near an edge, either reframe it during the resize or choose fit-with-padding so nothing important slides under a button. A quick way to check is to take a screenshot of any TikTok and note where the buttons land, then mentally overlay that on your clip.
Trim before you resize
TikTok favors clips that get to the point quickly, so it is worth trimming to the strongest moment before you reshape the file. Trimming first also means you are not re-encoding seconds you will never use, which keeps processing faster and the output smaller. A good order of operations is: trim to the highlight, resize to 9:16, then verify. If the trimmed, resized file is still larger than you want for a quick mobile upload, run it through the Video Compressor as a final step. Keeping the clip tight and correctly shaped gives it the best chance of looking native in the feed.
Troubleshooting bars and stretching
Two problems show up most often after posting to TikTok. Black bars mean the file is not truly 9:16, so the app pads it; the fix is to resize to exactly 1080 × 1920 rather than relying on TikTok's in-app crop. Stretched or squashed footage means the aspect ratio was forced rather than cropped, distorting faces and circles. Always resize by cropping or padding, never by stretching to fill. If you are unsure which happened, check the actual output with the Metadata Checker: a clean file reads 1080 wide by 1920 tall with a 9:16 ratio. If the numbers are right but it still looks off in the app, the issue is framing, not dimensions.
Frequently asked questions
What size should a TikTok video be?
9:16 vertical at 1080 × 1920 pixels fills the screen cleanly on most devices.
Why does my TikTok have black bars?
The video is not 9:16, so TikTok pads it to fit. Resizing to 1080 × 1920 removes the bars.
Will resizing reduce quality?
Resizing re-encodes the video, so choose a high-quality output. Starting from a good source file keeps the result sharp.
Does the resizer upload my file?
No. It runs entirely in your browser; your video stays on your device.
Can I resize horizontal footage for TikTok?
Yes. Crop to the central part of the frame, or fit the whole frame with padding. Keep your subject centered for the best result.
Does TikTok have a maximum resolution?
1080 by 1920 is the practical target for vertical clips. Uploading a much larger file does not improve how it looks because TikTok re-compresses uploads, and it only makes the file slower to send.
Should I add the on-screen text before or after resizing?
Add or reposition text after you know the final 9:16 frame, so you can place it inside the safe zone away from TikTok's buttons. Adding text to a landscape clip first risks it getting cropped during the resize.
Can I post the same resized file to TikTok and Reels?
Yes. Both use 9:16 at 1080 by 1920, so one vertical master works on both. Just double-check that text stays clear of each app's interface, since the button positions differ slightly.