Open-source credits

HEIC support uses the unmodified heic-to 1.6.6 library by Hoppergee, based on libheif 1.23.6 and libde265, under the GNU LGPL. It is loaded as a separate replaceable module.

LGPL license · GPL license · Library source package and build files · Upstream project · libheif source · libde265 source

These libraries may be replaced or modified under their licenses. The site JavaScript is provided in readable source form. See the bundled license files for full terms.

Document tools

• Mammoth 1.11.0 (DOCX content import), BSD-2-Clause. License · Source
• SheetJS Community Edition 0.20.3 (spreadsheet data), Apache-2.0. License · Project
• fflate 0.8.2 (ZIP reading), MIT. License · Source
• DOMPurify 3.3.1 (HTML sanitization), Apache-2.0 or MPL-2.0. License · Source
• Tesseract.js 6.0.1 and Tesseract.js-core 6.0.0 (OCR), Apache-2.0. JavaScript license · Core license · Source
• English and Greek Tesseract language data, from @tesseract.js-data packages 1.0.0, 4.0.0_best_int. Language data source · Apache-2.0 license

PDF processing

PDF.js license · PDF.js source · pdf-lib license · pdf-lib source

Conversion libraries, OCR workers and language files are served by this site. User documents are processed in the browser.