X (Twitter) Post Image Specifications
Complete guide to X (Twitter) image dimensions and specifications for posts. Create engaging tweets with the perfect image size and format for maximum impact. Updated for 2026.
Quick Specs
Dimensions & Resolution
Best for maximum visibility in timeline
Works well for single images
Alternative landscape format
Important Notes
X (formerly Twitter) supports various image formats and aspect ratios for posts. Images are displayed in-stream at a maximum width of 504 pixels on desktop and full-width on mobile. The 16:9 aspect ratio (1200×675px) provides the best visibility without cropping in the timeline. **PostFast Pro Tip:** When scheduling X posts through PostFast, your images are automatically optimized for the best display. You can also create carousel posts with up to 4 images, schedule auto-retweets, and cross-post to Instagram, Facebook, TikTok, and LinkedIn simultaneously.
Optimization Tips
- ✓Use 16:9 aspect ratio (1200×675px) for optimal display
- ✓Keep important content centered to avoid cropping
- ✓PNG format for graphics with text, JPEG for photos
- ✓Multi-image posts: 2 images (7:8), 3 images (first 7:8, others 4:7), 4 images (2:1 each)
- ✓Alt text improves accessibility and engagement
- ✓Keep photos under 5MB, X's upload limit
- ✓GIFs auto-play in timeline without sound
- ✓Schedule carousel posts (up to 4 images) for higher engagement
- ✓Use PostFast to auto-retweet top-performing posts at peak hours
- ✓Cross-post to Instagram & Facebook to maximize content ROI
Sources & Verification
Last verified: 2026-09-25
X Help Center: 1-4 photos per post, photos up to 5MB, animated GIFs up to 5MB on mobile and 15MB on web. X developer docs: JPG, PNG, GIF and WEBP. Alt text up to 1,000 characters. X publishes no organic post image size; 1200x675 (16:9) is our recommended working size for the timeline preview.
Profile & Page Dimensions
Multi Image Layouts
Display Widths
Maximum display width in pixels
Alt Text
Alt text for accessibility
Create carousel posts and schedule auto-retweets. PostFast handles the technical specs automatically.
Frequently Asked Questions
What's the best image size for X (Twitter) posts?
1200×675 pixels (16:9 aspect ratio) is optimal as it displays without cropping in the timeline. This size works well across both desktop and mobile views. PostFast automatically optimizes your images when scheduling posts.
How many images can I post in a single tweet?
You can post up to 4 images in a single tweet. They will be arranged in different layouts: 2 images side-by-side, 3 images with one large and two small, or 4 images in a 2×2 grid. Use PostFast to easily create and schedule carousel posts with multiple images.
What happens to images over 5MB?
X's photo limit is 5MB, so compress or resize anything larger before you upload it. The higher 15MB limit applies only to animated GIFs uploaded on the web (5MB in the mobile apps).
Do profile images have different requirements?
Yes, profile images should be 400×400 pixels and are displayed in a circular frame (square for Premium Business and Premium Organizations accounts). Header/banner images should be 1500×500 pixels (3:1 aspect ratio).
Can I schedule X posts with images in advance?
Yes! With PostFast, schedule X posts with single images, carousel posts (up to 4 images), or videos days or weeks in advance. You can also schedule auto-retweets and retweet any post by URL for maximum reach.
Recent Updates
Corrected the file size: X caps photos at 5MB, and the 15MB web limit applies only to animated GIFs. Added the official X sources.
Migrated to evergreen URL structure. Verified all specifications current.
X maintains support for various image formats with 16:9 recommended for optimal display
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