X's timeline favors 16:9: post that ratio and the preview shows your full image instead of an algorithmic crop of it. 1600 × 900 hits the ratio with enough resolution for the expanded view.
This page opens the local resizer preset to 1600 × 900. Cover mode center-crops to fill; contain letterboxes the whole image if cropping is off the table.
Loading tool…
This is Resize Image preconfigured for this task — open the full tool for every option.
Select an image to see its current dimensions.
Enter a width/height or percentage, or pick a platform preset (each shows its exact pixels).
Choose fit behaviour: contain, cover (center-crop), or stretch.
Preview the resulting dimensions, then export.
The exported image is re-decoded and its pixel dimensions are compared to your requested dimensions before download is offered.
Non-16:9 uploads get an automatic preview crop that follows the platform's saliency logic, not your composition. Supplying 1600 × 900 sidesteps it — the preview is your image.
Somewhat. X always re-encodes, but an image already at display ratio and size takes exactly one recompression with no extra scaling, which keeps text and edges cleaner.
Technical guidance for choosing settings and reviewing the result.
There is no quality percentage that makes every image exactly 1 MB or 100 KB. A reliable target-size workflow measures real encodes, preserves the best result under the limit, and tells you when resizing is necessary.
8 min read · Reviewed August 2026