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X source-checked spec

X Post image image size

Use a 16:9 image with the important subject centered for timeline previews and video-adjacent placements.

1600x900 practical landscape image16:9reviewed 2026-06-29verified false
Max file size
unknown in source page
Accepted formats
JPG, PNG, GIF, WebP
Effective date
unknown
Local tool
/resize-to/twitter-post

Source and note

Source: X media upload guidance. Reviewed 2026-06-29.

X help content emphasizes media behavior; this row stays conservative for static post-image use.

Platform image specs are compiled from official sources and source-checked by image cat. Platform rules can change, account types can differ, and acceptance is never guaranteed. If an official page does not state an effective date, effectiveDate is set to unknown and verified remains false.