Published August 8, 2026 · 4 min read

X currently recommends 1500 by 500 pixels for header images and 400 by 400 for profile images. Keep important header content away from responsive crop zones and inspect the result on desktop and mobile.

What current primary sources establish

  • X Help: profile and header image sizes: Recommends 400 by 400 profile images and 1500 by 500 header images.
  • X Help: posting pictures and GIFs: Explains how common single-photo aspect ratios display in posts.
  • MDN: Image file type and format guide: Compares JPEG, PNG, WebP, and AVIF, including transparency and compression tradeoffs.
  • Apple: Using HEIF or HEVC media: Explains when Apple devices preserve HEIF and when sharing may convert it to a more compatible format.

Recommended workflow

  • Create the header at X's current recommended 1500 by 500 pixels and keep important content away from the profile-photo overlap and responsive edges.
  • Prepare the profile image as a centered square source, then preview the circular crop.
  • For post images, use an aspect ratio that X currently displays in full and avoid placing tiny text near the edges.
  • Upload and inspect the result on desktop and mobile. Revise the crop if the live interface hides text or branding.

Choose the next action

  • Keep the source format when the destination accepts it and no delivery problem exists.
  • Create a derivative when the destination needs different dimensions, transparency, compatibility, or byte size.
  • Use a specialist color or print workflow when profiles, spot colors, proofs, or contractual reproduction quality matter.

Decision boundary

Pixel dimensions, format, transparency, metadata, and byte size are separate decisions. A smaller file is successful only when the destination accepts it and the image still communicates the required detail.

Final quality checks

  • Record the destination's required format, pixels, aspect ratio, transparency, and byte limit.
  • Inspect edges, text, faces, gradients, and color at 100% zoom; keep the source image.
  • Test the actual upload or rendered placement rather than relying on an estimated compression percentage.

Common mistakes to avoid

  • Changing format when a simple resize would solve the problem.
  • Ignoring transparency, orientation metadata, color profiles, or crop behavior.
  • Upscaling a weak source and treating invented pixels as recovered detail.
  • Judging quality from a thumbnail instead of checking the final placement.

Where LoveMyFile fits

Use the LoveMyFile image resizer for the bounded task described here. Keep any authoritative source or original when applicable, inspect the output, and use the official destination or an approved specialist system for requirements outside that task.

Sources and review date

Sources below were reviewed on September 2, 2026. Reopen time-sensitive requirements, limits, prices, policies, and interfaces before acting.

This article provides technical and editorial guidance. It is not legal, medical, tax, immigration, or compliance advice.