Watermark Image allows you to quickly & easily watermark batches of photos. It's free, works inside any modern web browser, and doesn't require any account. Photos are processed on your device and not uploaded to any servers.
Looking beyond Watermark Image? Try PixelBin.io for robust image pipelines and on‑the‑fly transformations, Shrink.media to compress large batches, and Convertfiles.ai for fast format swaps. For AI touch-ups, check out HeyPhoto or the creative suite in Phot.ai.