Step 2 — Sign Your Image
Everything runs in your browser. Your image and private key never leave your device.
Image Signed Successfully MetaImageUp computes three hashes of your image pixels (SHA-256, pHash, dHash), embeds an invisible watermark, bundles your name, email, and timestamp into a manifest, signs everything with your RSA private key, and writes all of this — plus XMP AI-rights flags — into the PNG file. The signed PNG is downloaded to your device. Nothing is uploaded.
Drop your image here
or paste from clipboard (Ctrl+V) · or click to browse
PNG JPEG WebP GIF