Preliminary screening
Claude Watermark Detector
Use this Claude watermark detector to screen pasted text for AI-writing patterns without making unsupported claims about hidden or official Claude watermarks.
What this Claude watermark detector does
The tool analyzes general AI-writing patterns and explains the signals behind its estimate. It is designed for preliminary screening, not provider attribution.
Can a detector prove text came from Claude?
Not from writing style alone. Similar phrasing can come from humans, editing tools, templates, translation, or many different models.
How to check a Claude watermark claim
Paste a sufficiently long sample, review the explanation, and look for independent provenance such as drafts or original platform records. Plain-text probability is only one piece of evidence.
A careful way to use the result
Use the score to decide what deserves a closer look, not to identify a specific model or author with certainty. Avoid disciplinary, hiring, or grading decisions based on this result alone.
Claude Watermark Detector FAQ
Practical answers about the check, its results, and its limits.
Can I detect a Claude watermark online?
You can check general AI-writing signals online, but this tool cannot certify an official Claude watermark or identify Claude as the unique source.
What is the difference between a Claude watermark checker and a Claude AI detector?
A watermark checker implies an embedded signal. A Claude AI detector usually infers writing patterns. This tool performs the second kind of analysis.
Can edited Claude text still be detected?
Editing can strengthen, weaken, or remove detectable patterns, and human writing can produce similar patterns. The outcome is therefore probabilistic.