4K X videos: what's actually possible

4K technical sheet

Highest rendition we've seen

1080p (1920×1080 or 1080×1920)

Our 2160p support

The labeler names any rendition ≥2160 px “2160p”; it would show automatically

Upscaling

Never: no fake 4K files

4K photos

Possible when the upload was that large (original-size photos)

Get 4K from an X post

1. Extract the post. Paste the link and press Extract.
2. Take the top button. That's the highest X has; for most HD posts it's 1080p.
3. Need more? Ask. Request the original from the uploader.

How 4K works on X

Our quality labels go up to 2160p and 1440p in the code, because we'd rather list a real 4K rendition the day X publishes one than miss it. We haven't seen one in X's media data at the time of writing.

A site that hands you a “4K” file of an X video has either renamed the 1080p file or upscaled it, which makes the file 3–4 times bigger with no extra detail. You can check: open the file's properties and look at the bitrate; an upscale keeps X's original blockiness.

If 4K matters (for a film project, say), the only real source is the creator's original file. Ask them; our permission guide has templates.

Limits and honest caveats

• Our statement about the 1080p ceiling is an observation that can change if X changes its encoding.
• Even 1080p isn't available for every post.

Upscaled “4K” versus real 4K

An upscaler creates a 3840×2160 frame by guessing new pixels between the existing ones. Simple upscaling only makes the picture softer and the file bigger; AI upscaling sharpens edges but can invent texture, distort faces and smear text. Neither recovers detail that X's 1080p encode didn't keep.

If you see a 4K option on another downloader, compare the file sizes: a real 2160p rendition would be several times larger than the 1080p one. A file that is the same size or only slightly larger is the 1080p video with a new label.

For display on a 4K TV, there's no need to convert anything yourself: the TV scales a 1080p file to the full screen, usually better than a quick upscaler would.

The same applies to frame rates: X normally publishes at the frame rate of the upload, up to 60 fps, and no downloader can add frames that were never encoded.

Screen recordings and game captures are a common source of 4K uploads, and they too come back from X at 1080p or below; for those, ask the uploader whether a sharper export exists elsewhere, such as on YouTube.

Questions people ask