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X (Twitter) header and image size checker

X Help recommends 1500 x 500 pixels for the header and 400 x 400 for the profile photo, which has to be a JPEG, GIF or PNG under 2 MB. X also says up to 60 pixels at the top and bottom of a header can be cropped, depending on the screen and browser. Drop in an image to check it.

Try it

PlacementSize
Header1500 x 500
Profile photo400 x 400
Post photoSingle photo between 2:1 and 3:4 shows in full

Drop a local file to check it. Nothing is uploaded.

How it works

  1. 1

    Drop in an image. The browser reads it, and nothing is uploaded.

  2. 2

    The checker compares it with the 1500 x 500 header and the 400 x 400 profile photo, including the 2 MB profile photo limit.

  3. 3

    For post photos it shows the ratio, so you can see whether it falls between 2:1 and 3:4.

  4. 4

    Each row shows pass, or check when the shape or file size is off.

Platform facts

FAQ

What size is the X header?
1500 x 500 pixels, per X Help.
Why does my header get cut off?
X Help says up to 60 pixels at the top and bottom can be cropped on some screens and browsers. Keep text away from those edges.
What size should my X profile photo be?
400 x 400 pixels, as a JPEG, GIF or PNG under 2 MB.
What shape should a post image be?
X Help says a single photo between 2:1 and 3:4 shows in full.

Optional next step

Let your agent schedule this on X

Connect Claude, Cursor, Grok Bot or any MCP client to UniPost and ask it to post this to X at the time you pick. Your first 2 accounts are free.

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Related tools

Also see Schedule X posts

Sources