Files
markdown-converter/THIRD-PARTY-NOTICES.md
amitwh 1e24b52f3e feat(legal): bundle small dependencies, add notices, credits, and GPL source offers
Bundle (v4.7.0):
- MarkItDown frozen to a single ~75MB per-platform binary (PyInstaller via
  npm run bundle:markitdown; ML extras excluded) — built and verified
  locally: HTML/XLSX/PDF conversions pass through the bundled binary, and
  the app resolves bin/linux/markitdown first at runtime
- Packaging copies bundled markitdown alongside Pandoc for win/mac/linux;
  FFmpeg/sharp/KaTeX/fonts were already bundled

Legal artifacts:
- THIRD-PARTY-NOTICES.md: complete license inventory of everything
  distributed (binaries, npm runtime deps, fonts, embedded Python packages)
- SOURCES.md: GPL §3(b) written source offers for Pandoc 3.9.0.2,
  ffmpeg-static's GPL build, and the PyInstaller bootloader; LGPL relinking
  note for libvips
- third-party-licenses/: canonical GPL-2.0, LGPL-2.1, MPL-2.0, Apache-2.0,
  OFL-1.1, PSF-Python texts
- Help > Third-Party Notices & Licenses: in-app viewer for both documents
- README: 'Bundled Dependencies, Legal Notices & Credits' section

Hardening:
- download-tools.js now SHA-256 pins every artifact, verifies after
  download AND against the cache on every run, and hard-fails on mismatch
  (closes security finding D6)

Large tools intentionally not bundled (documented): LibreOffice,
MiKTeX/TeX Live, ImageMagick, PlantUML+JRE, Calibre.

637/637 tests green; lint clean; clean boot; bundled binary verified.
2026-09-05 22:30:54 +05:30

109 lines
5.3 KiB
Markdown

# Third-Party Notices & Licenses
MarkdownConverter (this app) is MIT-licensed. This document lists the
third-party components that are **distributed with** the application, their
licenses, and where to obtain source code. Full license texts for the
copyleft and font licenses referenced here are in the `third-party-licenses/`
folder shipped alongside this file (and in the source repository).
This product includes software developed by third parties under the licenses
below. Copyright and license notices are reproduced verbatim or referenced
per each license's terms.
---
## 1. This application
**MarkdownConverter** — Copyright (C) 2024-2025 ConcreteInfo (Amit Haridas) —
MIT License. See the repository `LICENSE` file.
---
## 2. Bundled external binaries
These run as separate operating-system processes, launched via `execFile`
with literal argv (never a shell, never linked into the app).
| Component | Version | License | Notes |
|---|---|---|---|
| Pandoc | 3.9.0.2 | GPL-2.0-or-later | Downloaded at build time by `scripts/download-tools.js` (SHA-256 pinned); license: [GPL-2.0](third-party-licenses/GPL-2.0.txt) |
| FFmpeg | bundled by `ffmpeg-static` 5.3.0 | **GPL-3.0-or-later build** (`--enable-gpl --enable-libx264/x265`) | License text: <https://ffmpeg.org/legal.html>; source offer below |
| MarkItDown | 0.1.7 (+ Python deps) | MIT | Microsoft's any-file→Markdown importer, frozen with PyInstaller by `scripts/bundle-markitdown.js`; includes an embedded CPython runtime (PSF license) |
| sharp / libvips prebuilt binaries | 0.35.4 | Apache-2.0 / **LGPL-2.1-or-later** (libvips) | Dynamically loaded native addon; LGPL compliance: this app's full MIT source is public, enabling relinking; license: [LGPL-2.1](third-party-licenses/LGPL-2.1.txt) |
| KaTeX (CSS + fonts) | 0.18.5 | MIT | `assets/katex/` |
| JetBrains Mono, Fira Code fonts | — | SIL OFL 1.1 | `assets/fonts/`; license: [OFL-1.1](third-party-licenses/OFL-1.1.txt) |
| Electron | 41.x | MIT | and its bundled Chromium (BSD-style licenses) / Node.js (MIT) / OpenSSL (Apache-2.0) — see <https://www.electronjs.org/blog/electron-licensing> |
### GPL source availability (GPL §3 offer)
Corresponding source for every GPL-licensed binary distributed with this app
is available on written request and from these permanent locations — see
**[SOURCES.md](SOURCES.md)** for exact versions and URLs.
### Python packages inside the bundled MarkItDown binary
The frozen MarkItDown binary embeds CPython and (each MIT/Apache-2.0/BSD-3/
PSF/MPL-2.0 licensed unless noted): markitdown, onnxruntime (MIT), numpy
(BSD-3), magika (Apache-2.0), beautifulsoup4 / soupsieve (MIT), requests
(Apache-2.0) + urllib3/idna/charset-normalizer, certifi (MPL-2.0),
markdownify, defusedxml (PSF), protobuf (BSD-3), flatbuffers (Apache-2.0),
pdfminer.six (MIT), python-docx, python-pptx, openpyxl, extract-msg,
markdown-it-py / mdurl, pyinstaller (GPL-2.0-with-exception — build tool
only; its bootloader is embedded, source offer included in SOURCES.md),
Packaging, six, click, chardet (LGPL — dynamically loadable Python module).
---
## 3. npm dependencies shipped in the app (runtime)
| Package | Version | License |
|---|---|---|
| @cantoo/pdf-lib | 2.9.1 | MIT |
| @codemirror/* (autocomplete, commands, lang-*, language, lint, search, state, theme-one-dark, view), codemirror | 6.x | MIT |
| @replit/codemirror-vim | 6.4.0 | MIT |
| core-util-is | 1.0.3 | MIT |
| docx | 9.6.1 | MIT |
| dompurify | 3.4.14 | (MPL-2.0 OR Apache-2.0) |
| electron-store | 10.1.0 | MIT |
| ffmpeg-static | 5.3.0 | GPL-3.0-or-later (binary; see §2) |
| highlight.js | 11.11.1 | BSD-3-Clause |
| html2pdf.js | 0.14.0 | MIT |
| jszip | 3.10.1 | (MIT OR GPL-3.0-or-later) |
| katex | 0.18.5 | MIT |
| marked, marked-footnote, marked-highlight | 17.x / 1.4 / 2.2 | MIT |
| mermaid | 11.17.2 | MIT |
| pdfjs-dist | 5.5.207 | Apache-2.0 |
| pdfkit | 0.17.2 | MIT |
| pizzip | 3.2.0 | (MIT OR GPL-3.0) |
| sharp | 0.35.4 | Apache-2.0 (+ LGPL libvips binaries; see §2) |
| simple-git | 3.36.0 | MIT |
| tslib | 2.8.1 | 0BSD |
(Development-only dependencies — electron-builder, eslint, prettier, jest,
cross-env, @testing-library/dom — are not distributed with the application.)
## 4. Optional external tools (NOT bundled)
These are detected and used when the user installs them; no copy is
distributed with this app, so no redistribution obligations arise:
- **LibreOffice** (MPL-2.0) — enhanced Office-format conversion
- **MiKTeX / TeX Live** (LPPL/GPL per component) — LaTeX PDF export
- **ImageMagick** (Apache-2.0-style) — extra image formats in the universal converter
- **PlantUML** (GPL-3.0) + a Java runtime — local diagram rendering
- **Calibre** (`ebook-convert`) — MOBI export
- **System MarkItDown with `[all]` extras** — audio transcription / OCR
## 5. Trademarks
Product names used to describe compatibility (Pandoc, FFmpeg, LibreOffice,
MarkItDown, Microsoft, Excel, Word, PowerPoint…) are trademarks of their
respective owners and are not affiliated with this project.
## 6. License texts
See the `third-party-licenses/` directory: `GPL-2.0.txt`, `LGPL-2.1.txt`,
`MPL-2.0.txt`, `Apache-2.0.txt`, `OFL-1.1.txt`, `PSF-Python.txt`. MIT and
BSD-3-Clause texts are short and reproduced in each package's own repository;
per-package LICENSE files also ship inside `node_modules/` in source form.