Check if a file was made with Claude
热度趋势
趋势数据积累中
百分比基于当前可用热度信号，而非评论数或独立用户人数。
Claude通过两种方式标记其生成的内容：文本内容带有水印，文件则附带内容凭证。用户可以通过上传文件至指定工具来检查文件是否由Claude生成。该工具通过识别文件元数据中符合C2PA行业标准的加密签名内容凭证来判断Claude的参与。它支持JPG、PNG、MP4、MOV等多种图像和视频格式，文件大小上限为100MB。上传的文件不会被存储或用于其他目的，工具仅读取嵌入的凭证以确认Claude是否参与了文件的制作。
Check if a file was made with Claude
Check a file
Drag and drop or click to add a file.
Supported formats: JPG, PNG, GIF, WEBP, TIFF, HEIC, AVIF, SVG, DNG, JXL, MP4, MOV, AVI, WAV, MP3, M4A, FLAC · up to 100 MB
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 Claude was involved in producing the file. It can't tell whether Claude was involved in creating the content, and it does not include any identifying information about the user.
How it works
When Claude produces a supported file type (such as a .png, .jpg, or .svg), it will attach a content credential in the form of a small, cryptographically signed note in the file’s metadata, saying that the file was made or processed with Claude.
This is an open industry standard called C2PA—the same used by camera manufacturers and in photo-editing software to record where an image came from. Any C2PA-aware tool can read it
If we find one that points to Claude, we'll tell you here.
Similar tools are available from other model providers ( OpenAI , Google DeepMind , Gemini ).
How can I tell if Claude created the text?
To detect watermarks embedded in text we have a Detection API which is currently in private preview to eligible organizations as required under EU law.
Read more about file and text detection here .
What happens to the file you upload
- Your file stays on your device.
- The checker only reads the embedded credential, not the file itself.
- Your file is never stored or used for any other purpose.