X (Twitter) Image and Video Specs 2026
Current X image, card, and video specs for 2026 after the late 2025 redesign, including the new 3:4 feed crop, Premium 4K uploads, and card image rules.
X (Twitter) Image and Video Specs 2026
X finished rolling out the November 2025 feed redesign to all users in February 2026. The main change: media in the timeline now renders uncropped up to a 3:4 portrait ratio instead of the old 16:9 letterbox. This broke a lot of templates. Here is what the current spec set actually looks like, including what changed for Premium subscribers.
In-feed images
The timeline crop is now 3:4 instead of 16:9. Landscape images still display, but they show smaller than before because the viewport prioritizes portrait.
| Format | Aspect | Recommended px | Max file |
|---|---|---|---|
| Portrait | 3:4 | 1200 x 1600 | 5 MB (free), 8 MB (Premium) |
| Square | 1:1 | 1200 x 1200 | 5 MB / 8 MB |
| Landscape | 16:9 | 1920 x 1080 | 5 MB / 8 MB |
| Tall | 2:3 | 1200 x 1800 | cropped to 3:4 in feed |
Supported formats: JPEG, PNG, WebP, and GIF. AVIF is still not supported on upload as of April 2026 despite being requested since 2023. HEIC is not supported.
Premium 4K uploads
X Premium and Premium+ subscribers can upload images up to 4096 x 4096 at full quality without server-side recompression. Non-Premium uploads are capped at 4096 x 4096 dimensions but get recompressed to roughly 85% JPEG quality regardless of the original format.
If you are posting photography work, Premium+ is worth it purely for the absence of compression. Non-Premium PNG uploads convert to JPEG server-side. Premium PNG uploads stay PNG if under 5 MB.
Card images (link previews)
The summary_large_image card is still the one you want. Specs:
- Aspect ratio: 1.91:1 (exactly)
- Minimum: 300 x 157
- Recommended: 1200 x 628
- Max file size: 5 MB
Anything outside 1.91:1 gets cropped from the center. Put your headline text in the middle third of the image.
The smaller "summary" card (square, 144 x 144 minimum) still works but renders at roughly a quarter of the visual footprint. Not worth using unless your preview image is genuinely square.
Video
Video got the biggest upgrade in the redesign. Premium+ subscribers can now upload 4K at up to 8 Mbps for clips under 10 minutes. Free accounts are still capped at 1080p 30fps.
Current specs:
| Tier | Max resolution | Max length | Max file |
|---|---|---|---|
| Free | 1920 x 1080 at 30fps | 2 minutes 20 seconds | 512 MB |
| Premium | 1920 x 1080 at 60fps | 60 minutes | 2 GB |
| Premium+ | 3840 x 2160 at 60fps | 3 hours | 8 GB |
Codec requirements:
- Container: MP4 or MOV
- Video codec: H.264 (high profile) or H.265 (Premium+ only)
- Audio codec: AAC-LC, 128 kbps minimum, stereo
- Frame rate: 30 or 60 fps (variable frame rate gets re-encoded)
- Color: 4:2:0 chroma subsampling, Rec. 709 color space
H.265 uploads from iPhones work on Premium+ but get transcoded to H.264 for playback on older clients. There is no benefit to shipping H.265 unless your source is already H.265 and you want to skip the intermediate re-encode.
Aspect ratio and the timeline crop
The 3:4 portrait shift means old 16:9 landscape video now shows up roughly 35% smaller in the feed than it did a year ago. If you are producing video specifically for X, shoot or reframe to 9:16 or 3:4. For cross-posting existing 16:9 content, it still plays fine, it is just visually quieter.
GIFs
GIFs max out at 15 MB and get converted to MP4 server-side (H.264). If you are uploading anything longer than 5 seconds, just export MP4 yourself — you control the quality better than X's converter does.
Converting from other platforms
Instagram exports, TikTok downloads, and iPhone Live Photos all need format work before they fit X's upload path:
- TikTok downloads are H.264 but often variable-frame-rate, which X re-encodes
- iPhone HEIC photos need conversion to JPEG or PNG first
- Instagram Reels come through as H.265 in a MOV — convert to H.264 MP4 for Free/Premium tiers
You can do the HEIC and MOV conversions in the browser through Konvrt's converter without uploading originals anywhere. For large weekly batches of product clips or photo dumps, the batch tool handles the whole queue at once.
The takeaway: design for 3:4 in the feed, use 1200 x 628 for link cards, and if you care about image quality enough to read this far, Premium+ is the only tier where your pixels survive intact.