Licenses and source code
The site is built on open source projects. Below are the components that run in your browser, their licenses and links to the source code, including our changes and build scripts for the copyleft engines.
Copyleft engines
License: GPL-3.0-or-later
Video and audio. Our WebAssembly build is based on the ffmpeg.wasm scripts and includes x264, x265, libvpx, LAME, Ogg, Theora, Vorbis, Opus, zlib, libwebp, FreeType, FriBidi, HarfBuzz, libass, zimg, dav1d and opencore-amr.
License: LGPL-2.1-or-later, BSD-3-Clause
Creating and unpacking archives. Built without the RAR code.
License: LGPL-3.0
Reading HEIC and HEIF photos.
License: MPL-2.0
Reading and writing video and audio with WebCodecs.
License: MPL-2.0
Drawing SVG and text over images.
Other engines and libraries
ImageMagick (magick-wasm 0.0.44)
License: Apache-2.0
Rare image formats and camera RAW files.
jSquash (MozJPEG, libwebp, libavif, libjxl, OxiPNG)
License: Apache-2.0
Encoding and decoding popular image formats.
License: Apache-2.0
Reading and rendering PDF.
License: MIT
Creating and editing PDF.
License: MIT
Creating and editing PDF.
License: Apache-2.0
Setting and removing PDF passwords.
License: Apache-2.0
DOCX, XLSX and PPTX to PDF.
Tesseract (tesseract.js-core 7.0.0)
License: Apache-2.0
Text recognition (OCR).
License: MIT, BSD-2-Clause
Unpacking RAR archives and compressing single files.
License: MIT
Font subsetting for PDF.
License: MIT
Font conversion.
License: MIT, Zlib
Font conversion.
SheetJS Community Edition 0.20.3
License: Apache-2.0
Spreadsheets XLSX, XLS and ODS.
License: BSD-2-Clause
Word documents, Markdown and HTML.
License: MIT
Word documents, Markdown and HTML.
License: MIT
Word documents, Markdown and HTML.
License: MIT
Word documents, Markdown and HTML.
License: MIT
ZIP archives and data: CSV, XML, YAML and TOML.
License: MIT
ZIP archives and data: CSV, XML, YAML and TOML.
License: MIT
ZIP archives and data: CSV, XML, YAML and TOML.
License: ISC
ZIP archives and data: CSV, XML, YAML and TOML.
License: BSD-3-Clause
ZIP archives and data: CSV, XML, YAML and TOML.
License: Unlicense
Image to SVG tracing.
Fonts
Noto Sans, Noto Sans Mono, Noto Emoji, Noto Sans Symbols, Noto Sans SC, Noto Sans KR
License: OFL-1.1
Text in PDF, captions and watermarks.
Liberation Sans, Serif, Mono 2.1.5
License: OFL-1.1
Metric-compatible fonts for Office documents.
License: GPL-2.0 with font exception
Metric-compatible fonts for Office documents.
License: OFL-1.1
Metric-compatible fonts for Office documents.
License: Apache-2.0
Metric-compatible fonts for Office documents.
Interface
License: MIT
Site interface.
License: MIT
Site interface.
License: MIT
Site interface.
License: MIT
Site interface.
License: MIT
Site interface.
License: MIT
Site interface.
License: MIT
Site interface.
License: ISC
Icons.
Source code of the copyleft engines
Engines under GPL, LGPL and MPL are loaded as separate modules only when a task needs them and are not mixed into the site code. The links above lead to the exact versions we use, together with our patches and build scripts, so you can rebuild them yourself.
If a link stops working, write to us at [email protected] and we will send the source code.