PDF APIs
Choose a document comparison endpoint
Diffchecker exposes two PDF comparison APIs. Use Plain Text when you want the plain-text document diff response shape, or choose Rich Text when you need structured geometry, page images, visual comparisons, or richer export options.
/pdf/plaintextPlain Text
Plain-text PDF diff output for quick integrations that want the familiar Diffchecker-style JSON or HTML response.
Best when you want a simpler, text-focused diff shape.
Good fit for standard review flows and lightweight integrations.
Matches the plain-text document diff behavior already used elsewhere in the product.
/pdf/richtextRich Text
Structured PDF diff output with polygons, page images, visual-content comparison, and export-ready HTML or PDF.
Best for custom viewers, overlays, and downstream automation.
Includes geometry and page metadata for precise rendering.
Adds richer output modes, including PDF export and visual object comparison.