Design Twitter header images at 1500x500 with text, backgrounds, and avatar-safe zone preview.
This tool composes an X (Twitter) profile header on the exact canvas X recommends: 1500x500. You add text and a background, and the editor overlays the avatar-safe zone - the bottom-left region where your profile photo sits on top of the banner after upload - so you can see what will be covered before you export. The download is a full-size image ready to upload. The thing users most often get wrong: leaving the headline inside that bottom-left zone, or assuming the full 1500x500 frame is what visitors see, when mobile shows a center crop of the banner.
A concrete input and expected output from the current implementation.
Input
Title: CARTON WEEKLY / Subtitle: New issues every Friday / Background: dark blue gradient / Keep all text out of the avatar safe zone
Expected output
A 1500x500 pixel image - 750,000 pixels at a 3:1 ratio - with the headline and subtitle placed above the bottom-left avatar zone, which the preview shades so the placement can be checked before download.
The tool's canvas is fixed at 1500x500, the size X expects for headers (3:1), so the export carries exactly those dimensions; the shaded avatar zone marks the bottom-left region the profile photo will cover, and the text sits above it.
Every composition is built on X's recommended header size: 1500x500, a 3:1 frame. Text and the background you choose are arranged inside it, and the export delivers the whole canvas at those exact dimensions, so the file uploads to X without further cropping or resizing. What you design in the editor is what the desktop profile shows.
X's profile photo overlaps the bottom-left corner of the header. The tool draws that overlap region as a shaded guide in the editor, and the same guide appears in the final preview, so text and logos can be kept clear of it. Anything placed inside the zone will be partially or fully hidden behind the avatar once the header is live.
On desktop X, your profile photo sits at the bottom-left of the header, overlapping it. The tool shades that region so you can keep text and logos out; after upload, anything inside it is hidden behind the avatar. It is a guide based on X's current layout, so treat it as a minimum margin rather than a pixel-exact guarantee.
1500x500 pixels, exactly - the size X recommends for headers - so the file uploads as-is without further cropping or resizing. If it looks soft on your screen, re-export the full-size image rather than screenshotting the browser preview, which is scaled to fit the window.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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