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Local OCR for scanned PDF

Recognize printed text from scanned PDF pages locally in Spanish and English. Review, copy and download TXT with progress updates and cancellation.

Local processing. PDF: 5 MiB and 50 pages; output 20 MiB. Editing may invalidate existing signatures. No encryption or XFA.

Printed-text OCR in ES/EN, up to 5 pages. First download: engine ≈4 MB + Spanish ≈2.1 MB / English ≈3 MB, only when processing. Models are not saved in IndexedDB. It does not reconstruct tables or reliably recognize handwriting.

What this tool does

Recognize printed text from scanned pages with Tesseract in a local worker. Output is editable TXT; review and correct recognition errors.

How to use it

  1. Load a PDF and select up to five pages.
  2. Choose Spanish, English or both and 108/144 DPI. Local engine and model downloads start only when processing.
  3. Follow per-page progress or cancel. Review the text before copying it or downloading TXT.

Verifiable example

Input
Readable scan: El niño pidió información. Hello world.
Expected result
Editable text containing those words, subject to errors depending on image quality, resolution and language.

Limitations to review

  • PDF 5 MiB/50 pages; select up to 5. Raster 8 MP/page and 24 MP/job; OCR timeout 120 seconds.
  • No searchable PDF, table reconstruction or handwriting guarantee. Blank pages may return empty text. Accuracy depends on the image.

Read the full tutorial

Related tools

Browse all guides. Local processing: the page downloads HTTP resources but does not send files or input data to a server for these functions.