TinyJPG Compressor is a free, open-source Windows desktop app wrapping the TinyPNG API for batch image processing. While TinyPNG limits you to 20 images per batch, this tool gives you unlimited batch size, watermark, SEO rename, 9 format outputs (JPG, PNG, WebP, AVIF, ICO, PDF), and multi-Key rotation. Drag, drop, and go. Built for designers, e-commerce sellers, and webmasters who process hundreds of images daily.