AI-powered writing assistant for grammar, style, and tone improvements across documents and emails.
Claude watermark checker
$1Starting price
0Popularity
About Claude watermark checker
The tool scans pasted text for traces left by Anthropic’s Claude models, including HTML class names, invisible Unicode characters, smart quotes, and em dashes. It runs entirely in the browser with no uploads or account required, providing deterministic counts and positions for each finding. For detected artifacts, a one-click cleanup removes HTML classes and invisible characters. A separate rewrite engine rephrases sentences to vary rhythm and length, addressing stylistic patterns that may indicate machine generation. The service distinguishes between detectable artifacts and unverifiable watermarks, noting that Anthropic’s statistical watermark cannot be confirmed without a private key. Checking is free and unlimited, while rewrites consume credits billed monthly or as one-time packs.
Key features
- Detects HTML class names containing 'claude'
- Finds zero-width and invisible Unicode characters
- Identifies smart quotes, em dashes, and non-breaking spaces
- Counts and locates each artifact in the text
- One-click removal of detectable artifacts
- Sentence rewrite to vary rhythm and length
- Browser-based with no server-side storage
- Open-source detection engine
Use cases
- Verifying whether pasted text contains Claude-generated artifacts
- Cleaning text for platforms that flag AI-generated content
- Rewriting text to reduce stylistic patterns associated with AI
Pros
- Free and unlimited text checking with no account required
- Runs entirely in-browser; no text is uploaded or stored
- Provides deterministic counts and positions for each detected artifact
- Offers one-click removal of HTML classes and invisible characters
- Open-source detection engine for transparency
Cons
- Rewriting requires paid credits after free checking
- Does not verify Anthropic’s statistical watermark without a private key
- Rewrite engine is the only paid component
Frequently asked questions about Claude watermark checker
What exactly does this tool check for in Claude-generated text?
The tool scans for detectable traces left by Anthropic’s Claude models, including HTML class names containing 'claude', invisible Unicode characters like zero-width spaces, smart quotes, and em dashes. It also identifies stylistic patterns such as sentence rhythm and length uniformity.
Who is this tool designed for?
The tool is designed for anyone who needs to verify whether text was generated by a Claude model, including writers, editors, educators, and platform moderators who want to ensure content authenticity or remove AI-generated artifacts.
How does the pricing model work?
Checking for watermarks is free and unlimited with no account required. Cleaning and rewriting text consume credits, which can be purchased as monthly subscriptions or one-time packs. Credits never expire.
Does this tool detect Anthropic’s statistical watermark?
No. Anthropic’s statistical watermark requires a private key to verify, which has not been released. The tool explicitly states that any claim to detect or confirm this watermark is speculative.
Is my text private when using this tool?
Yes. The checking process runs entirely in your browser, and your text is never uploaded. The rewrite feature sends text to a model provider for processing, but the text is not retained afterward or used for training.
How do I get started with the tool?
Paste your text into the provided box, and the tool will instantly analyze it for detectable artifacts. If artifacts are found, you can remove them with one click or use the rewrite engine to vary sentence patterns.
