项目简介
高性能 Rust 库，可检测 PDF 是否为文本型或扫描件，提取带位置信息的文本，并转换为干净的 Markdown，无需 OCR。提供 Python、Node.js 和 WebAssembly 绑定及 CLI 工具，用于智能路由，跳过大部分文本型 PDF 的 OCR 处理。
README 预览
# pdf-inspector\n\n[](https://crates.io/crates/pdf-inspector)\n[](https://www.npmjs.com/package/@firecrawl/pdf-inspector)\n[](https://pypi.org/project/pdf-inspector/)\n[](LICENSE)\n\nFast Rust library for PDF classification and text extraction. Detects whether a PDF is text-based or scanned, extracts text with position awareness, and converts to clean Markdown — all without OCR. Includes bindings for [Python](docs/python.md), [Node.js](napi/README.md), and [browser WebAssembly](wasm/README.md).\n\nBuilt by [Firecrawl](https://firecrawl.dev) to handle text-based PDFs locally in under 200ms, skipping expensive OCR services for the ~54% of PDFs that don't need them.\n\n## Features\n\n- **Smart classification** — Detect TextBased, Scanned, ImageBased, or Mixed PDFs in ~10-50ms by sampling content streams. Returns a confidence score (0.0-1.0) and per-page OCR routing.\n- **Text extraction** — Position-aware extraction with font info, X/Y coordinates, and automatic multi-column reading order.\n- **Markdown conversion** — Headings (H1-H4 via font size ratios), bullet/numbered/letter lists, code blocks (monospace font detection), tables (rectangle-based and heuristic), bold/italic formatting, URL linking, and page breaks.\n- **Table detection** — Dual-mode: rectangle-based detection from PDF drawing ops, plus heuristic detection from text alignment. Handles financial tables, footnotes, and continuation tables across pages.\n- **CID font support** — ToUnicode CMap decoding for Type0/Identity-H fonts, UTF-16BE, UTF-8, and Latin-1 encodings.\n- **Multi-column layout** — Automatic detection of newspaper-style columns, sequential reading order, and RTL text support.\n- **Encoding issue detection** — Automatically flags broken font encodings so callers can fall back to OCR.\n- **Single document load** — The document is parsed once and shared between detection and extraction, avoiding redundant I/O.\n- **Browser WebAssembly** — Run the same Rust parser locally in browsers and Web