pdf-markup

React PDF viewer & annotator SDK — highlight, markup, ink, shape, stamp and signature annotations with comments, review workflow and collaborative permissions. Export to PDF/Excel. React PDF 查看与批注 SDK， 支持高亮、笔迹、图形、印章、签名、评论审阅与协作权限。

Vue3 PDF viewer & annotator SDK — highlight, markup, ink, shape, stamp and signature annotations with comments, review workflow and collaborative permissions. Export to PDF/Excel. Vue3 PDF 查看与批注 SDK， 支持高亮、笔迹、图形、印章、签名、评论审阅与协作权限。

Free, browser-based PDF markup + device layout + bid generator for AV/security/network designers

Free, open-source construction takeoff software in your browser. Quantity takeoff from PDF drawings, scans and DXF files: set the scale, measure lengths and areas, auto-count symbols, export to Excel, save markups that open in Bluebeam. Drawings never upload. CLI and MCP server for AI agents.

Free PDF editor for construction drawings on Windows: markup, measure, count and sign. Fast on big plan sets. Downloads.

Headless, framework-agnostic PDF engine for any web framework — view, annotate, search, highlight, redact, stamp, watermark & export.