PDF annotation infrastructure
for production systems
InkLayer is a developer-first SDK for building reliable PDF review, markup, and annotation workflows with long-term maintainability and standards compliance.
Why InkLayer
PDF annotation looks simple until it reaches production. Coordinate transforms, rendering consistency, printing correctness, export reliability, and PDF specification compliance introduce hidden complexity.
InkLayer addresses these challenges at the infrastructure level, allowing teams to build document workflows without re-implementing fragile annotation logic.
Core Capabilities
Rich annotation model
Highlights, ink, text, stamps, clouds, shapes, and extensible annotation types with precise geometry.
Standards-compliant export
Built on PDF.js and pdf-lib to ensure compatibility across mainstream PDF viewers.
Embedding-first design
Designed to integrate into complex enterprise systems, not standalone demos.
Framework-friendly bindings
Provides a framework-agnostic core API, with optimized experience for React and native PDF.js integration.
Print & export ready
Designed for consistent export and printing workflows (coming soon).
Scalable & collaborative
Optimized for large documents, dense annotations, and collaborative workflows (roadmap feature).