OPTPDF · Understand
Make English scanned PDFs searchable
Recognize text in English scanned pages and rebuild them as a searchable PDF at 200 DPI. The default limit is ten pages. This OCR workflow requires a configured native service; check its availability above. Original vectors, links, forms and accessibility tags are not preserved.
This tool needs a processing service that is not connected yet. Your files have not been uploaded.
This tool is not available yet. Its processing service must be configured and tested before files can be submitted.
When this tool helps
- Make a short English scanned handout searchable by words and phrases.
- Prepare text recognition before extracting scan content into a text-based format.
Questions and practical limits
Does OCR support Chinese or other document languages?
Only English is currently supported and tested for this workflow. The interface language does not change the OCR engine's verified language support.
Will OCR preserve my original PDF structure?
No. It rebuilds rasterized pages with recognized text. Original vector graphics, links, forms and tags are lost, and recognition errors still require manual review.