Introduction to nctools

nctools is a suite of privacy-first document tools that run entirely in your browser. Convert, extract, OCR, and export files with zero uploads and zero server round-trips.

Who nctools is for

• Legal teams handling confidential contracts and case files.
• Finance teams processing invoices and statements.
• Compliance and DPO teams that cannot allow uploads to third-party servers.
• Anyone tired of ad-heavy free converters that hold files hostage behind a paywall.

How it is built

nctools runs on TanStack Start, React 19 and a small collection of best-in-class open-source libraries — pdfjs-dist for PDF parsing, tesseract.js for OCR, docx for Word output, xlsx for spreadsheet output. Everything renders in the user's browser.