Scanned PDF to Text

How Scanned PDF to Text works

Extract text from a scanned PDF page with built-in OCR. The page is rendered and read on your device; language data downloads once and is then cached. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

Render, then recognise

The page is rendered to a canvas with pdf.js at double resolution, then read by an OCR engine that runs locally. The first run downloads about 4 MB of language data, which is cached afterwards.

Double resolution matters: OCR on a low-resolution render confuses 8 with B and 1 with l, and upscaling a render does not recover detail that was never there.

What reads well

Printed text, straight, evenly lit, at 300 dpi or better. Our own test read a three-line page at 95% confidence and returned every line exactly — including a numeric string.

Handwriting, faint carbon copies, curved book pages and stamps are where accuracy collapses. Pre-processing with the image tools — contrast, grayscale, threshold — helps more than re-running OCR.

Checking the output

Always proofread. Digits and letters that look alike are the standard failures, and a confidence percentage is a guide rather than a guarantee.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions