PaperClean

About PaperClean

PaperClean is an API for cleaning up and enhancing images of paper documents, such as scanned pages, photos of documents, or whiteboards. It offers a two-pass enhancement endpoint for general document cleanup, a perspective-correction crop endpoint that takes four corner coordinates to fix distortion, and a combined pipeline endpoint that runs crop and enhancement in one request. Processing parameters such as passes, detail scale, gamma correction, and black/white input points can be configured per request.

Access requires an API key, sent via header or query parameter, and includes an endpoint to check current usage against monthly limits. Free API keys can be created through a registration endpoint without prior authentication. The service is intended for developers who need to programmatically clean up, straighten, or enhance document images, and it offers a free tier of 50 images per month, paid Starter and Pro tiers at higher monthly image limits, and an Enterprise tier with unlimited images.

Key features

• Two-pass document image cleanup and enhancement for scanned documents and photos
• Perspective correction cropping via 4 corner coordinates
• Combined crop + enhancement pipeline in a single request
• Configurable enhancement parameters (gamma, black/white point, detail scale)
• Usage tracking endpoint for checking plan limits and remaining images
• Self-service API key registration

Frequently asked questions