PDFyre-Superfast parallel OCR with unlimited pages, free and local.

I'm a med student and I built a PDF tool that never sees your files

I'm in medical school, and during exam season I got an 890-page scanned textbook. It was useless - no search, no copy-paste. Ctrl+F found nothing because there was no text, just pictures of pages.

Every free OCR tool I tried either capped the file size (mine was 132 MB) or wanted me to upload a book full of personal notes to their server.

So I built PDFyre - powered by a parallel processing engine that runs everything in your browser. It splits your document across multiple threads, processes dozens of pages at once, and uses every core your machine has. The 890-page book that started it all got OCR'd in minutes, all on-device.

How the engine works:

- Splits PDFs into chunks and processes pages concurrently across threads

- Multiple OCR workers run at the same time, not one page after another

- Zero uploads - the whole engine runs locally, so even 100+ MB files stay on your device

What it does:

- OCR PDF - make scanned PDFs searchable (100+ languages)

- Merge PDF / Split PDF / Compress PDF

- Rotate PDF / PDF to Images / Images to PDF

- Free, no accounts, no file size limits, no watermarks

Stack: PDF.js, pdf-lib, Tesseract.js - all client-side, orchestrated by the parallel engine.

Why it exists: Most PDF tools profit from your documents. PDFyre doesn't - it's privacy-first.

Looking for: feedback on the tools, the UX, and honest thoughts on whether privacy-first PDF tools are something you'd use.

Try it (free, nothing uploaded): https://pdfyre.xyz