About the Twitter Header Tool
The perfect Twitter/X header image is 1500x500 pixels (3:1 aspect ratio). Getting this ratio wrong causes Twitter to crop your header unpredictably, often cutting off faces or important text. DCPIXEL ensures pixel-perfect conversion every time.
100% Private — Processed in Your Browser
Every file stays on your device. DCPIXEL processes images entirely using the browser's built-in Canvas API and WebAssembly — zero server uploads, zero data collection.
Free — No Account, No Limits
DCPIXEL is completely free with no daily limits, no watermarks, and no registration. We never process your files on our servers, so we can offer this permanently at no cost.