Drop a photo, get a copy guaranteed under 200 KB at the best quality that fits. Nothing is uploaded — it all happens in your browser.
200 KB is the most common "reasonable" upload cap — job portals, listing sites, CMS media fields and support-ticket attachments cluster here. It's also a good self-imposed budget for images on your own website: at 200 KB a photo can be 1600 px wide and still sharp, which covers most layouts.
For a typical photo, roughly 1600 px on the long edge at good JPEG quality — for many phone photos that means you keep most of the useful resolution and just lose the bytes you couldn't see anyway. Detail-heavy images (foliage, textures, noise) need more bytes per pixel and will come out smaller or softer; clean subjects sail through. The quality number shown in the result tells you how hard the squeeze was: above ~80, you're unlikely to spot any difference at all.
Re-encoding drops the photo's metadata — EXIF timestamps, GPS coordinates, camera serial number — which for an upload to a stranger's website is usually exactly what you want. Orientation is applied to the pixels first, so nothing turns sideways. If you want metadata gone but pixels untouched (no recompression), that's a different tool: PixWash, from the same family.