Embed Watermark
A confidential document is about to be shared. Choose a recipient, and Qmark will embed an invisible watermark before delivery.
A confidential document is about to be shared. Choose a recipient, and Qmark will embed an invisible watermark before delivery.
This text appears identical to the original. The watermark is invisible.
Watermarked content was found online. Paste it below to identify the source.
Qmark uses a multi-layered approach to embed invisible identifiers into text content.
Invisible Unicode characters (U+200B, U+200C) are inserted between words. Each character encodes a single bit. Completely invisible in browsers and most editors.
Survives: copy-paste, text extraction
Specific Latin letters are replaced with visually identical characters from other Unicode blocks (e.g., Latin 'a' becomes Cyrillic 'a').
Survives: OCR, screenshots, visual inspection
Bits are encoded in trailing whitespace at line-ends. Single trailing space = 0, double trailing space = 1.
Survives: PDF extraction, HTML rendering
Upload an image to embed an invisible steganographic watermark. The result appears inline — then verify it without re-uploading.
Upload a PNG, JPG, or WEBP image (min 300×300 px). Identity: Emily Carter — Analyst, First National Bank.
Upload any image to check for a Qmark steganographic watermark.
Embed a near-invisible QR code watermark. The QR encodes only a lookup ID — identity is resolved server-side, preventing forged attribution.
Upload a PNG, JPG, or WEBP image (min 200×200 px). Identity: Emily Carter — Analyst, First National Bank.
Upload any image to check for a Qmark QR watermark.
On detection: QR decoded → wmid extracted → registry lookup → identity returned. The QR itself contains no identity data.