How do I make a scanned PDF searchable using Acrobat?

Open your scanned PDF in Acrobat. Go to 'All tools' > 'Scan & OCR' > 'In this file'. Select the pages you want to process and the language of the text. Click 'Recognize Text'. Acrobat will add a layer of searchable text over the image.

Systemic Bad Scans in Adobe Acrobat — How-to & AI prompts

AI prompts

1 way to ask · copy any one

DBecome — “help me grow”Over the last [N=40] submitted documents, about [count=15] required rescans or photocopier…+

Over the last [N=40] submitted documents, about [count=15] required rescans or photocopier fixes that ate up clerk time before hearings. I want to change the handoff so fewer unusable scans come in. Identify the pattern in the failures, name the one change to submission handling or public instructions that would prevent the bulk of rescans, and describe how I can measure improvement in the next [days=60].

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid

1
Open your scanned PDF in Adobe Acrobat.
2
Go to All tools and select Scan & OCR.
3
From the left panel, select Enhance Scans.
4
Adjust the image borders if needed by dragging the blue handles to tightly frame the document content.
5
Use the available enhancement options to deskew, adjust contrast, and remove background as needed for clarity.
Best practiceImproving contrast and removing background noise before OCR can significantly increase text recognition accuracy, especially for faded or uneven scans.
6
Click Apply to save the image enhancements.
7
Return to the Scan & OCR pane and select Recognize Text.
8
Choose In This File to run OCR on the current document.
9
Click Recognize Text to start the OCR process.
NoteIf the document was previously OCR'd, Acrobat may prompt to re-recognize text; confirm to proceed if needed.
10
Save the enhanced, OCR-processed PDF.

In the appWith the API

Enhancing the image before running OCR helps Acrobat recognize text more accurately in poor-quality scans.

This runs in the Acrobat app - there is no separate API for this task.

Glossary

words on this page

OCROCR stands for Optical Character Recognition. It is technology that turns images of text into real text you can search and copy.ExampleAfter scanning a paper invoice, OCR allows you to copy the vendor's name from the image.

DPIDPI means dots per inch, and it tells you how clear an image is when it is scanned.ExampleA scanned photo saved at 300 DPI will usually contain more detail than the same photo at 72 DPI.

Searchable LayerA hidden layer of text added to an image-based PDF, allowing you to search for words within the document.ExampleThe hidden searchable layer in the scanned contract allowed us to find specific clauses.

The real tasks

the one, listed here

We keep wasting hours fixing bad scans before a hearing; it's systemic

FAQ

about this task

Open your scanned PDF in Acrobat.
Go to 'All tools' > 'Scan & OCR' > 'In this file'.
Select the pages you want to process and the language of the text.
Click 'Recognize Text'. Acrobat will add a layer of searchable text over the image.

This message means the page already has real text, not just an image. OCR is for converting image-only pages into searchable text. If a page already has text, you don't need OCR, and Acrobat will not run it again. You can already search or copy text from such pages.

For the best OCR accuracy, you should scan your documents at 300 dpi (dots per inch). While Acrobat can try to recognize text from scans as low as 72 dpi, higher resolution like 300 dpi greatly improves how well the text is recognized, making fewer mistakes.

Yes, you can automate this. Adobe offers a PDF Services API with an 'OCR PDF' operation. This allows you to programmatically convert image-based PDFs to searchable ones. It's very useful for businesses that need to process and make many documents searchable for archiving or indexing purposes.

Selecting the correct language is very important because OCR software uses language-specific rules and dictionaries to recognize characters and words. If you choose the wrong language, the OCR engine might make many mistakes, leading to incorrect text and poor search results. Always pick the language that matches the text in your scan for the best accuracy.

Systemic Bad Scans

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails