How to use this tool
Choose an image and generate a grayscale version. Transparency is preserved in PNG and WebP outputs. Download the result when ready.
Good to know
PNG, JPEG and browser-supported WebP inputs only. Maximum input file: 20 MB; decoded images and outputs: 16 million pixels and 8,192 pixels per side. Animated WebP is flattened to a still frame. Browser decoding may apply image orientation; preview the result. Metadata and animation are not preserved, and colors may change during browser conversion. JPEG removes transparency using white. Export support depends on the browser and is checked before download. Compression is lossy and may produce a larger file. All processing stays on your device; images are not uploaded or saved by the site.