POST/document/redline

Compare Documents (Redline)

Upload an original DOCX (`left_docx`) and a revised DOCX (`right_docx`) as multipart/form-data. The response is a DOCX based on the revised document with differences represented as Microsoft Word tracked changes.

Parameters

emailquerystring

Your email address. Required if not using an API key.

Request Bodyrequired

left_docxstring (binary)required

Original Word document. The uploaded filename must end in .docx.

right_docxstring (binary)required

Revised Word document. The uploaded filename must end in .docx.

Responses

Every response includes the X-Credits-Used header. In JSON responses, the same value is also available in the creditsUsed field.

Valid revised-document-based DOCX containing tracked changes. Usage has committed before delivery starts.

application/vnd.openxmlformats-officedocument.wordprocessingml.document

string (binary)

Example Request

curl
curl -X POST \
  "https://api.diffchecker.com/public/document/redline?email=your@email.com" \
  -F "left_docx=@/path/to/left_docx.docx" \
  -F "right_docx=@/path/to/right_docx.docx" \
  --output "redline.docx"

Try It