AllNewTools PDFKit — open-source engines

All document processing runs on the user's device. No paid conversion API is used.
The application downloads engines only when needed. The LibreOffice engine is
self-hosted; normal users do not depend on the vendor's CDN service.

LibreOffice / ZetaOffice WASM, build efaf0670b4d055f838a2849becb10f08aa06a257
Retrieved from https://cdn.zetaoffice.net/zetaoffice_latest/ on 2026-10-23.
The compiled engine is unmodified (Brotli assets decoded for self-hosting).
Source: https://git.libreoffice.org/core/+/refs/heads/distro/allotropia/zeta-24-2
Exact build source: https://git.libreoffice.org/core/+/efaf0670b4d055f838a2849becb10f08aa06a257
LibreOffice is distributed under MPL 2.0 and applicable third-party licenses.
See licenses/LibreOffice-LICENSE.txt, licenses/LibreOffice-NOTICE.txt and
licenses/MPL-2.0.txt. Embedded fonts and libraries retain their own licenses.
Readable LibreOffice notices are generated from the official base 24.2.0.3
release's readlicense_oo/license/license.xml and NOTICE; COPYING.MPL and
COPYING.LGPL are also included. The exact WASM branch and build are linked above.
Build and integration information: https://github.com/allotropia/zetajs
Associated source/build dependencies:
https://github.com/allotropia/emscripten/commits/fixed-3.1.65
https://github.com/allotropia/qt5/tree/5.15.2%2Bwasm
https://github.com/allotropia/qtbase/tree/5.15.2%2Bwasm
Qt is available under LGPL v3 / GPL v3 and applicable third-party licenses.
Users may modify and rebuild these open-source components. No technological
restriction is imposed by this application on running a modified local engine.
Our integration files office/runner.js and office/office-thread.js are readable
source and based on allotropia's MIT-licensed convertpdf example.

ZetaJS 1.2.0 — MIT; copyright allotropia software GmbH and contributors.
Source: https://github.com/allotropia/zetajs
License: licenses/ZetaJS-MIT.txt

QPDF 12.2.0 — Apache 2.0.
Copyright 2005–2021 Jay Berkenbilt; 2022–2025 Jay Berkenbilt and Manfred Holger.
Source: https://github.com/qpdf/qpdf/tree/v12.2.0
WASM wrapper @neslinesli93/qpdf-wasm 0.3.0 — package metadata declares ISC.
Source: https://github.com/neslinesli93/qpdf-wasm
License and package metadata: licenses/QPDF-Apache-2.0.txt,
licenses/qpdf-wasm-package.json. Engine files are unmodified.

PDFium via @embedpdf/pdfium 2.15.1 — wrapper MIT, PDFium BSD-style licenses.
Source: https://github.com/embedpdf/embed-pdf-viewer
Licenses: ../vendor/pdfium/LICENSE and ../vendor/pdfium/LICENSE.pdfium
PDFium reconstructs cross-reference tables and separates text from graphics.

PDF.js — Mozilla, Apache 2.0.
Source: https://github.com/mozilla/pdf.js
Existing AllNewTools PDF.js distribution is reused for parsing and rendering.

PptxGenJS 4.0.1 — MIT.
Source: https://github.com/gitbrent/PptxGenJS
License: licenses/PptxGenJS-MIT.txt; bundled JSZip: licenses/JSZip-MIT.txt

ExcelJS 4.4.0 — MIT.
Source: https://github.com/exceljs/exceljs
License: licenses/ExcelJS-MIT.txt

zip.js — BSD 3-Clause.
Source: https://github.com/gildas-lormeau/zip.js
License: licenses/zip-js-BSD.txt

Engine hashes and sizes: engine-manifest.json

Conversion limits: PDF is a page-description format. Reconstructed Office text
is editable, but fonts, colors and reading order can change. Image appearance
mode is explicitly labelled. PDF/A export is image-based PDF/A-2b; the browser
checks identifiers and readable pages, not every conformance rule. The release
test fixture was independently validated with veraPDF; each user's important
archive should also be independently validated.