
claude.com
September 2, 2026
1 min read
53/100
Summary
Check if a file was made with Claude What the tool is Claude marks content it makes in two ways: - Text gets a watermark in the writing itself, for example an e-mail or essay Claude drafts - Files get a content credential—signed provenance metadata that is attached when you download, for example, a chart Claude created. This tool identifies only the content credential, which tells you whether Clau...