Sign in
← AI PulseSep 2, 2026

Policy · news · Single-source brief

Anthropic Provides Tool to Check for Claude-Generated Content Credentials

Anthropic has released a browser-based tool that allows users to check files for content credentials indicating they were made or processed with Claude.

By Illumora Editorial

Source · Sep 2, 2026, 6:05 PM · On Illumora · Sep 2, 2026, 6:07 PM

Rewritten from one allowlisted primary — not independent enterprise reporting. Lanes →

Brief drafted by Illumora’s editorial model from the linked primary source. Ops desk reviews flagged pieces. How we write →

Read the source →Claude Security product — Check if content is made with Claude
Save

Anthropic has introduced a new browser-based tool designed to identify content credentials within files, signaling whether Claude was involved in their creation or processing. This tool operates locally, ensuring that files do not leave the user's device during the checking process.

Key Points

  • The tool identifies content credentials, which indicate Claude's involvement in producing a file, but not the user's identity or whether Claude created the content itself.
  • Claude attaches a cryptographically signed content credential in the metadata of supported file types, such as .png, .jpg, or .svg, when it produces or processes them.
  • This content credential adheres to C2PA, an open industry standard also used by camera manufacturers and photo-editing software.
  • The tool supports various image and audio formats, including JPG, PNG, GIF, WEBP, TIFF, HEIC, AVIF, SVG, DNG, JXL, MP4, MOV, AVI, WAV, MP3, M4A, and FLAC, with a maximum file size of 100 MB.
  • For text content, Anthropic offers a Detection API for watermarks, currently in private preview for eligible organizations as required under EU law.
  • The checker only reads the embedded credential and does not store or use the file for any other purpose.

Context

According to Anthropic, Claude marks content in two distinct ways: files receive a content credential, and text receives an embedded watermark. The newly released tool specifically focuses on detecting these content credentials in files. Similar tools are available from other model providers, including OpenAI, Google DeepMind, and Gemini.

Why It Matters

This tool provides a practical method for users to verify the provenance of digital files, offering transparency about Claude's role in their generation. It highlights the growing importance of content credentials and watermarking in establishing the origin of AI-generated content.

What To Do

  • Test the browser-based tool by dragging and dropping a supported file to check for Claude content credentials.
  • Note the distinction between content credentials for files and watermarks for text when evaluating AI-generated output.
  • Watch for further announcements regarding the general availability of the Detection API for text watermarks.
  • Compare the functionality and supported formats of this tool with similar offerings from other model providers.