Resize for X/Twitter Header
X's header photo is a wide banner that crops unpredictably if you upload the wrong proportions. This tool resizes to the correct 1500×500 dimensions before you upload, so you control exactly what's visible.
Your file never leaves your device. Everything on this page runs locally in your browser — nothing is uploaded to a server.
Drop images here, or click to choose files
Processed entirely on your device
Size
If the aspect ratio doesn't match…