Our stack is auditable
Every tool that runs on StuHub uses widely-reviewed open-source libraries — pdf-lib, pdfjs-dist, xlsx / SheetJS, jszip, jsqr, jsbarcode, js-yaml, fast-xml-parser, turndown, sql-formatter, tesseract.js, and dompurify among others. You can read the source of every dependency and every line of StuHub's own code.
Inspect any tool yourself
Because every tool is client-side, the complete behaviour of any utility is in the JavaScript bundle your browser downloads. Open DevTools → Sources and you can step through how a tool processes your file — no server logic, no black box.
Contributing
Bug reports and feature requests go on the issue tracker. Pull requests are welcome — see the repository's CONTRIBUTING.md for setup instructions and coding conventions.