Open-source engine notices

Polywinkle’s interface uses separately licensed open-source conversion engines. Engine code is not proprietary Polywinkle code. No source-map or minification restriction removes upstream licence rights.

@ffmpeg/ffmpeg 0.12.15 — MIT
@ffmpeg/core 0.12.10 — GPL-2.0-or-later
@imagemagick/magick-wasm 0.0.45 — Apache-2.0
pdf-lib 1.17.1 — MIT
fflate 0.8.2 — MIT
mammoth 1.10.0 — BSD-2-Clause
@e965/xlsx 0.20.3 — Apache-2.0
pdfjs-dist 5.4.296 — Apache-2.0
@esbuild/win32-x64 0.25.12 — MIT

FFmpeg.wasm includes third-party codecs; see the bundled licences and upstream build configuration at FFmpeg.wasm. ImageMagick notices: NOTICE, LICENSE. Libraries are distributed unchanged except application bundling; upstream source is available from their official repositories/npm package records.

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FFmpeg source and licence access

FFmpeg core is separately licensed GPL-2.0-or-later. The JavaScript wrapper is MIT licensed. Download GPLv2 and wrapper licence. The upstream source and build dependencies remain freely accessible: FFmpeg5.1.4 source, FFmpeg.wasm source, and its build configuration with linked codec source repositories. These engine licences and source rights are not restricted by the Polywinkle interface copying deterrents.