About Detect AI Watermarks

About Detect AI Watermarks

Detect AI Watermarks (detectaiwatermarks.com) is a free, browser-first AI watermark detector that scans your text for hidden Unicode characters and lets you clean and copy the result in a single click. It is built for writers, editors, students, teachers, developers, and anyone who ships text to readers, screens, or systems.

Why we built it

In 2025, AI-generated text is everywhere — and so are the invisible Unicode characters it carries. Zero-width spaces, variation selectors, directional marks, and BOM characters leak from AI tools into CMS pipelines, database inserts, screen readers, and search indexes. They cause real, measurable damage: broken layouts, failed JSON inserts, screen-reader bugs, and homoglyph spoofing in phishing.

We wanted a free, private, no-signup tool that would let anyone detect and remove these characters in seconds. No model inference, no API key, no "please log in with your Google account" gate — just paste, scan, clean, copy.

What we detect

Our scanner covers 30+ invisible Unicode characters across the following categories:

• Zero-width characters — U+200B, U+200C, U+200D, U+2060, U+FEFF
• Variation selectors — U+FE00 through U+FE0F (16 characters)
• Bidirectional control marks — U+200E, U+200F, U+202A–U+202E, U+2066–U+2069
• Special & invisible spaces — U+00A0, U+202F, U+205F, U+2007–U+200A
• Invisible operators — U+00AD, U+2061–U+2064
• Line & paragraph separators — U+2028, U+2029

When suspicious characters are found, you can optionally trigger a server-side AI-generated content review for a 0–100 confidence score and a short reason. The review is optional, fails gracefully to a front-end-only result, and never stores your input.

Our values

1. Privacy first. Your text is scanned locally in your browser. It is only forwarded to our server when you explicitly trigger the AI review, and even then it is never stored.
2. Free forever. No credit card, no trial. Anonymous users get 5 checks per day; sign-up unlocks 50/day.
3. Browser-first. The core scan runs in your browser — no waiting on a remote model, no rate-limited API call for the basic use case.
4. Open about limitations. A negative result does not prove a text is human-written. A positive result does not prove a text is AI-generated. We tell you exactly what we found and let you decide what to do with it.

Who we are

Detect AI Watermarks is operated by a small team focused on text provenance tooling. You can reach us at support@detectaiwatermarks.com or via the contact page.

Get started

Try the detector on the home page — no signup required. Read more on the blog or browse the rest of this site via the footer.