Free · Private · In your browser

OCR PDFLite

Lite OCR: recognizes text from scanned pages. Quality depends on scan resolution and clarity.

Drop your files here, or click to browse
Processed on your device — nothing is uploaded

How your files are handled

We built these tools so you never have to wonder where your documents go. Here is exactly what happens when you use them.

  • Your files are processed entirely in your browser using open-source libraries (pdf-lib, PDF.js, and others).
  • Nothing is uploaded to our servers. We have no backend that receives, stores, or scans your documents.
  • We cannot see, store, or access your files — not during processing, not after, not ever.
  • Processing uses your device's memory and CPU. Large files may take longer, especially on phones and tablets.
  • All tools are free with no paywall tricks, no hourly task limits, and no watermarks on your output files.

OCR note: This tool downloads Tesseract language data from the internet the first time you run it. Your PDF pages are still processed locally — only the recognition engine files are fetched, not your documents.

How it works

Three simple steps. Your files never leave your device, and the result downloads straight to your computer or phone.

Frequently asked questions

Common questions about privacy, pricing, and how these tools work.

More optimize tools

Other free PDF utilities that work the same way — private, in-browser, no sign-up.

How to oCR PDF

OCR PDF recognizes the text in scanned pages and adds an invisible, searchable text layer over the original images. The result is a PDF whose text you can select, copy, and search.

  1. Add your scanned PDF; the page images are processed on your device.
  2. Pick the document's language for the most accurate recognition.
  3. Click Run OCR to recognize the text page by page.
  4. Preview and download the searchable PDF, or grab the recognized text as a .txt file.

Good to know: The OCR engine (~24 MB) loads from UnboundPDF on first use and is cached; the document image itself never leaves your device.

Everything happens in your browser — your file is never uploaded, and there is no sign-up, watermark, or limit.

Frequently asked questions

Are my files uploaded to a server?

No. Every tool runs entirely in your browser using open-source libraries, so your file is processed on your own device and is never uploaded. We have no backend that receives, stores, or scans your documents.

Is it really free, and will there be a watermark?

Yes. There is no account, no sign-up, and no hourly limit, and the tools never add a watermark to your output. UnboundPDF is free and is not affiliated with Adobe.

Does it work on a phone or tablet?

Yes. The tools run in any modern mobile browser as well as on desktop. Because the work uses your device's own memory and processor, very large files simply take longer on phones.

Does my document get uploaded for OCR?

No. Recognition runs in your browser and your document image stays on your device. The recognition engine (about 24 MB) loads from UnboundPDF the first time you use OCR and is then cached by your browser, so only the first run needs a connection.

What does the output look like?

It is a searchable PDF: your original page images with an invisible text layer on top, so the text can be selected and searched. You can also download the plain recognized text.

Why is some recognized text wrong?

Accuracy depends on scan quality. Clear, high-resolution scans in the selected language give the best results, while blurry or skewed pages produce more errors.