Video size
X timeline video size
The timeline crops tall video to a preview and expands it on tap. Landscape or square shows the whole frame while scrolling, which is where most views happen.
- Resolution
- 1920x1080
- Aspect ratio
- 16:9
- Also accepted
- 1:1 · 9:16
File: MP4, H.264 video, AAC audio.
Length: Length limits on X depend on the account tier more than on the file.
Dimensions and ratios are stable. Length and file caps change often, these were checked in July 2026. Platform docs.
Crop calculator
Put in the size of the footage you have. You get the largest 16:9 crop that fits inside it, where to place it, and what to export.
- Crop box
- —
- Offset from top left
- —
- Trimmed away
- —
- Export at
- —
Shaded bands are where the X interface sits. Keep text and faces out of them.
Do the crop on your phone
Cropzen crops, trims and resizes video to these ratios on Android. No watermark, no sign-up, exports up to 4K.
What to watch out for on X
- Square is the safe compromise if the same file has to work on X and Instagram.
- Video autoplays muted, so anything carried by voice needs burned-in captions.
- Keep the file well under the tier limit, X re-encodes aggressively.
Questions people ask
What size should a X timeline video be?
1920 by 1080 pixels, an aspect ratio of 16:9. The timeline crops tall video to a preview and expands it on tap. Landscape or square shows the whole frame while scrolling, which is where most views happen.
Which aspect ratio does X accept besides 16:9?
1:1, 9:16 all upload, but they show bars or get cropped. 16:9 is the one that fills the frame.
Where does the X interface cover the video?
This surface shows the full frame with no interface over the video, so the whole area is usable.
How do I crop a video I already shot to this size?
Use the calculator on this page to get the exact crop box, then apply it in any editor. On Android, Cropzen does it in a few taps with no watermark and no sign-up.