X (Twitter) Post Image Size: The Dimensions That Look Sharp
Scroll through X's timeline and you'll notice every single-image post is displayed in the same wide rectangle, regardless of what shape the original photo was. That's because X crops single images to a fixed aspect ratio for the timeline preview — and if you don't plan for it, the crop can land right on a face or a headline.
This catches a lot of people off guard, especially when posting a screenshot of a long conversation or a tall infographic. What looked complete when you took the screenshot ends up truncated the moment it appears in someone else's feed.
Here's the size to target so your photo shows the way you intended, along with a few specific situations — screenshots, multi-image posts — where the cropping behaviour matters most.
Resize Image for Twitter / X Post
Resize images to the ideal Twitter / X post size: 1600x900 pixels, 16:9. Free, private, in-browser resizing — no watermark, no account, no upload.
The size to use: 1600 x 900 pixels
1600 x 900 pixels is a 16:9 ratio, which matches how X displays a single image in the timeline. Uploading at or close to this ratio means the preview shows your photo essentially as-is, rather than cropping the top and bottom off a taller image.
If your image is much taller or more square than 16:9, X will crop it down to that wide rectangle for the timeline preview, even though the full image is still viewable on tap. The problem is that most people scrolling past never tap — they only see the cropped preview.
What this means for text and screenshots
Screenshots — especially of chat conversations or long threads — are usually much taller than 16:9, so the timeline preview only shows the top portion. If the important part is further down, most people scrolling past will miss it entirely.
For screenshots, either crop to the relevant section before posting, or accept that viewers will need to tap to see the full image. If the point of the post depends on a specific line of text, it's worth cropping tightly around just that section rather than posting the whole conversation.
Multiple images in one post
- Two images split the frame vertically down the middle, so keep subjects centred rather than near the shared edge.
- Three images display with one large image and two smaller ones stacked beside it — plan your most important photo as the first one.
- Four images display in a 2x2 grid, each cropped to a small square — avoid important detail near any edge.
- A single well-composed 16:9 image almost always displays better than a busy multi-image grid.
Getting a sharp result at 1600 x 900
Because 1600 x 900 is a relatively large canvas, starting from a low-resolution photo and stretching it up will look noticeably soft. It's better to start from the highest-resolution version of your photo and crop down to 16:9 rather than upscaling a smaller image to fit.
If you're creating a graphic specifically for X — a quote card or a chart, for example — designing it directly at 1600 x 900 from the start avoids any resizing artefacts altogether.
Key takeaways
- 1600 x 900 pixels (16:9) is the size that displays without cropping in the X timeline.
- Tall screenshots often get cut off in preview — crop to the relevant part first.
- Multi-image posts crop each photo further, so keep subjects centred.
- A single well-sized image usually reads better than a cluttered grid.
- Start from a high-resolution original rather than upscaling a smaller photo.
- Resize before posting rather than relying on X's automatic crop.
Frequently asked questions
Related tools
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