Run a test on 1–2 sample pages before processing entire documents.
| Tool | Best for | Fix approach | |------|----------|---------------| | | Multi-language, complex scripts | Run via command line or gImageReader, output PDF with text layer | | ABBYY FineReader | Degraded historical documents | Superior noise filtering and layout retention | | OCR.space API | Batch processing of failing files | Cloud-based, different engine than Adobe | | NAPS2 (free scanner software) | Re-scan + OCR before Acrobat | Use ClearScan-equivalent output | adobe acrobat dc ocr fix