Open Source Licenses

This Site is built on top of many excellent open-source projects — thanks to their authors and communities. Below are the main third-party components used by this version and their licenses. Copyright of each component belongs to its respective holders; the full license texts are available in each project's official repository.

1. PDF Rendering & Processing

• pdf.js（pdfjs-dist） — Apache-2.0
• pdf-lib — MIT
• @pdf-lib/fontkit — MIT

2. OCR

• Tesseract.js — Apache-2.0
• Tesseract 语言模型（tessdata） — Apache-2.0

3. In-Browser Python Engine (Pyodide & locally bundled wheels)

• Pyodide — MPL-2.0
• PyMuPDF — AGPL-3.0 (AGPL-3.0：作为网络服务使用时要求向用户提供相应源码；商业授权请联系 Artifex（https://artifex.com）)
• pdf2docx — MIT
• python-docx — MIT
• python-pptx — MIT
• openpyxl — MIT
• pandas — BSD-3-Clause
• NumPy — BSD-3-Clause
• Pillow — MIT-CMU (HPND)
• OpenCV（opencv-python） — Apache-2.0
• lxml — BSD-3-Clause
• fontTools — MIT

4. Office → PDF Engine

• LibreOffice（WebAssembly 构建） — MPL-2.0
• @matbee/libreoffice-converter — MPL-2.0

5. Fonts

• Noto Sans SC — SIL OFL 1.1

6. Frontend Frameworks & Libraries

• Vue / Vue Router / Pinia / vue-i18n — MIT
• Element Plus（含图标库） — MIT
• Tailwind CSS — MIT
• Vite — MIT
• TypeScript — Apache-2.0
• JSZip — MIT 或 GPL-3.0（双许可）
• FileSaver.js — MIT
• docx — MIT
• docx-preview — Apache-2.0
• mammoth — BSD-2-Clause
• SheetJS（xlsx） — Apache-2.0
• PptxGenJS — MIT
• html2canvas — MIT
• Konva — MIT
• @vue-office（docx / excel） — MIT

7. Additional Notes

This list covers the core components distributed by the Site; for transitive dependencies, please refer to each project's dependency declarations. This page will be updated when component versions change.

AGPL-3.0 note: PyMuPDF is released under the GNU AGPL-3.0 license; when used as a network service, AGPL requires that the corresponding source code be offered to users. Upstream sources of the components used here are available via the links above; for commercial licensing, contact Artifex.