DPI Converter is a free, browser-based tool that lets you change the DPI of your images instantly — no uploads, no sign-up, no watermarks. Everything runs locally using the HTML5 Canvas API, so your files never leave your device. Supports JPG, PNG, WebP, BMP, TIFF, and GIF, with real-time print-size previews and batch processing for up to 50 images at once. Perfect for photographers, designers, and anyone who's had a print job rejected for "wrong DPI