Make a scanned PDF searchable

A scanned document is a picture of text, not text. You cannot search it, select a line, or copy a figure out of it. OCR — optical character recognition — reads the picture and writes what it finds back into the file as an invisible layer underneath the original image.

The page still looks exactly the same. What changes is that Ctrl+F now finds things, and so does anything that indexes your files.

Why this one costs credits

Every other PDF tool here runs in your browser, which is why they are free and why nothing you open ever leaves your device. OCR cannot work that way: it has to render each page at high resolution and run a recognition engine over it, and that is server work. It is metered with the same page credits Convertitive Extract uses — one credit per page.

What it does well, and what it does not

Clean scans of printed text come out close to perfect. Faint photocopies, heavy skew, handwriting, and complex multi-column layouts come out worse, and when recognition struggles the output is visibly garbled rather than quietly wrong. That is deliberate: a plausible-looking invented word in a contract is more dangerous than an obvious one.

Check the recognised text before relying on it. OCR output is a convenience, not an authoritative transcription.

Related tools

• Extract tables from a PDF — when you need the numbers in a spreadsheet, not the words on the page.
• Compress a PDF — scans are large; shrink one before emailing it.
• Sign a PDF — sign the searchable copy and keep the audit trail.