Convert the scanned interview transcripts and handwritten notes into searchable text, export them as a single searchab…
Open the scanned PDF file in Adobe Acrobat.
Go to the Tools menu.
Select Scan & OCR from the tools list.
Click Recognize Text and choose In This File.
In the settings panel, ensure PDF Output Style is set to Searchable Image.
Click Recognize to start the OCR process.
Save the PDF after OCR is complete.
Best practiceFor best OCR accuracy, scan your documents at 300 dpi and ensure the images are clear before running OCR.
After OCR completes, you can search, copy, and highlight text in your previously scanned PDF.
This runs in the Acrobat app - there is no separate API for this task.
Renderable text means the PDF already contains actual text characters, not just an image of text. OCR is designed to convert images of text into real text. If the page already has real text, OCR sees no image to convert and will not run. This is why you get an error message. OCR is only for image-only pages, like those from a scanner.
For better text recognition accuracy on blurry scans, you should rescan the document at a higher resolution. Acrobat recommends scanning at 300 dpi (dots per inch) for the best results. A higher DPI captures more detail, which helps the OCR engine recognize characters more accurately, even if the original scan wasn't perfect.
Selecting the correct language is very important because OCR software uses language-specific rules and dictionaries to identify characters and words. If you choose the wrong language, the OCR engine might misinterpret letters or common word patterns, leading to many errors in the recognized text. This makes the text layer inaccurate and less useful for searching.
Yes, you can automate making many scanned PDFs searchable using the Adobe PDF Services API. Specifically, the 'OCR PDF' operation allows you to programmatically convert image-based PDFs into documents with a searchable text layer. This is very useful for large-scale archiving, indexing, or integrating text recognition into other systems, saving significant manual effort.