How do I use Scan & OCR to make a scanned diary searchable in Adobe Acrobat?

Open 'All tools' in Adobe Acrobat. Choose 'Scan & OCR' and select your scanned diary PDF. Set the language and page range. Click 'Recognize Text' to start OCR. Save your new searchable PDF.

How does using Adobe Acrobat's Scan & OCR compare to other ways of making scanned diaries searchable?

Method Ease of Use Accuracy Automation. Adobe Acrobat Scan & OCR Easy, step-by-step in-app High with good scans Yes, with API Free online OCR tools Simple but limited features Lower, often limited by file size No Manual typing Very slow Depends on person No

Digitize Fragile Diaries in Adobe Acrobat — How-to & AI prompts

AI prompts

2 ways to ask · copy any one

AExecute — “help me do it”Scan the fragile 1889–1912 diaries from the Fletcher collection into durable PDFs, compress…+

Scan the fragile 1889–1912 diaries from the Fletcher collection into durable PDFs, compress files to reasonable sizes, and verify each page image is legible and in the right order before archiving.

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

BImprove — “do it better”Prepare the scans so other researchers can use them without handling originals — optimize…+

Prepare the scans so other researchers can use them without handling originals — optimize contrast for faded ink, split diary volumes into one file per volume, add descriptive filenames and compress without losing legibility, and call out pages with tears or missing leaves.

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 document in Adobe Acrobat.
2
Navigate to Tools and select Recognize Text.
3
Click Recognize Text, then choose In This File.
4
In the Recognize Text settings, set the output format to Searchable Image (Exact) to preserve the original image quality.
CautionUsing 'Searchable Image (Exact)' ensures the original scanned image is not altered, only a hidden text layer is added.
5
Set the document language to match the text in your scan for best accuracy.
6
Click Recognize Text to start the OCR process.
7
Save the PDF after OCR is complete.
Best practiceFor best OCR results and image fidelity, scan your originals at 300 dpi and avoid excessive brightness or contrast settings.

In the appWith the API

Choose 'Searchable Image (Exact)' in the OCR settings to keep your scanned page visuals unchanged while adding searchable text.

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.

Searchable PDFA searchable PDF is a document where you can look for words, even if it started as a scanned image.ExampleEven though it was a scan, the searchable PDF let me find every instance of 'warranty' in the document.

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.

The real tasks

the one, listed here

Scan fragile diaries from my collection into a durable digital format so researchers can use them without handling originals.

FAQ

about this task

Open 'All tools' in Adobe Acrobat.
Choose 'Scan & OCR' and select your scanned diary PDF.
Set the language and page range.
Click 'Recognize Text' to start OCR.
Save your new searchable PDF.

OCR stands for Optical Character Recognition. It is important because it changes pictures of words in scanned diaries into real text that you can search, copy, or read with a screen reader. This makes old, fragile diaries much easier to use and saves time when looking for information.

If your diary scan is blurry or has low-quality (for example, scanned at 72 dpi), Scan & OCR might not recognize the text well or could make mistakes. For best results, scan at 300 dpi or higher and make sure the pages are as clear as possible. Good quality scans help the OCR feature find and turn the words into real, searchable text.

Scan & OCR gives this error when the diary page already has real, selectable text instead of just an image. OCR only works on image-only pages. If your scan is mixed or already has text, remove the text layer or use a scan that is only an image.

Method	Ease of Use	Accuracy	Automation
Adobe Acrobat Scan & OCR	Easy, step-by-step in-app	High with good scans	Yes, with API
Free online OCR tools	Simple but limited features	Lower, often limited by file size	No
Manual typing	Very slow	Depends on person	No

Digitize Fragile Diaries

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails