SocialRobot· Updated 2026
X (Twitter) image & video sizes (Updated 2026)
X compresses media aggressively. Staying under the byte caps and keeping a sensible aspect ratio avoids failed uploads and muddy previews.
All X sizes at a glance
Updated 2026
| Content type | Dimensions | Aspect ratio | Max file size | Formats |
|---|---|---|---|---|
| Post image | Long edge up to 2048 | Flexible | 5 MB | JPEG, PNG, GIF, WebP |
| GIF | Up to 1280×1080 | Flexible | 15 MB | GIF |
| Video | Up to 1280×1024 | 1:3–3:1 | 512 MB (higher if verified) | MP4, MOV |
X content specifications
Post image
- Dimensions
- Long edge up to 2048
- Aspect ratio
- Flexible
- Max size
- 5 MB
- Formats
- JPEG, PNG, GIF, WebP
GIF
- Dimensions
- Up to 1280×1080
- Aspect ratio
- Flexible
- Max size
- 15 MB
- Formats
- GIF
Video
- Dimensions
- Up to 1280×1024
- Aspect ratio
- 1:3–3:1
- Max size
- 512 MB (higher if verified)
- Formats
- MP4, MOV
- Length / count
- 0.5–140 seconds
Best practices
- Keep still images under 5 MB; SocialRobot scales toward a 2048px long edge.
- Limit a post to four media items.
- Prefer MP4 (H.264) for video under 140 seconds.
Common mistakes
- Attaching more than four media items.
- Uploading multi-minute video past the 140s scheduling limit.
- Huge PNGs that blow past 5 MB.
Sizes for other platforms
Publish to X at the right size
SocialRobot crops and compresses at publish. Upload once, tweak the crop if you want, and schedule across your channels.
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