What we copied from the Top 5 — and what we refused
CloudConvert and Convertio win on “it just works,” then lose on privacy: the original WebP hits their servers. Squoosh is honest and local, but it is one file at a time. IrfanView and XnConvert are the batch gold standard — no upload, quality you can feel — and a 1990s window.
PixWipe takes the local batch and the quality slider, then adds the thing the upload sites never will: the pixels stay on this PC. JPG sits on white so email clients do not invent a black matte. PNG keeps the alpha. EXIF is stripped on the way out. No daily cap, no email gate, no watermark.