How do I compare two versions of a PDF file in Acrobat?

Open Acrobat and go to 'All tools'. Select 'Compare files'. Choose your older and newer PDF documents. Click 'Compare'. Acrobat will show you the differences.

What are the different comparison modes available in Compare Files?

Autodetect: Acrobat tries to guess the best way to compare your files. Reports/Spreadsheets: Best for documents with lots of numbers and tables. Presentation Decks: Good for slides or documents with a presentation style. Compare text only: Ignores graphics and only checks for text changes.

Validate Document Consistency in Adobe Acrobat — How-to & AI prompts

AI prompts

2 ways to ask · copy any one

AExecute — “help me do it”Compare the [documents=client's estate documents] with the [document=investment recommendations…+

Compare the [documents=client's estate documents] with the [document=investment recommendations PDF] and highlight any conflicting clauses or beneficiaries before I finalize the plan this week.

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

BImprove — “do it better”When evaluating estate versus investment docs, flag beneficiary mismatches, inconsistent…+

When evaluating estate versus investment docs, flag beneficiary mismatches, inconsistent executor powers, or payout timing that contradicts our recommendations, summarize the conflicts with suggested fixes, and mark the highest‑risk items so I can discuss them with the client and their attorney before finalizing.

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 Adobe Acrobat on your computer.
2
Go to Tools and select Compare Files.
3
Click Select File under 'Compare' and choose your first PDF (the older or original version).
4
Click Select File under 'With' and choose your second PDF (the newer or revised version).
5
Click Compare to start the comparison.
6
Review the results in the comparison summary and use the side-by-side view to examine highlighted differences.
Best practiceFor best results, avoid using scanned PDFs as input files, as text recognition may be inconsistent.

In the appWith the API

You can filter the comparison results to focus on text, images, or formatting changes for a clearer review.

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

Glossary

words on this page

Compare FilesThis tool helps you find differences between two similar PDF documents.ExampleYou use this tool to quickly spot the differences between an original and a revised PDF document.

Security SettingsRules that protect a PDF file, like preventing changes or copying.ExampleThe security settings on the PDF prevented anyone from printing or copying its contents.

Summary PageA page that shows you the main differences between two files.ExampleThe summary page highlighted that one document had an extra paragraph compared to the other.

Who does this

3 roles

EditorLegal AssistantProject Manager

FAQ

about this task

Open Acrobat and go to 'All tools'.
Select 'Compare files'.
Choose your older and newer PDF documents.
Click 'Compare'. Acrobat will show you the differences.

Comparing text only means Acrobat will ignore any pictures or graphics in your documents. This is useful when you only care about changes in the words, not how the images look or if they moved. It can make the comparison faster and clearer for text-heavy documents.

Compare Files cannot work with documents that have security settings because these settings prevent Acrobat from fully accessing and processing the file's content. To compare such files, you must first remove the security protection from both the old and new documents. This allows Acrobat to read and analyze all parts of the PDFs.

Autodetect: Acrobat tries to guess the best way to compare your files.
Reports/Spreadsheets: Best for documents with lots of numbers and tables.
Presentation Decks: Good for slides or documents with a presentation style.
Compare text only: Ignores graphics and only checks for text changes.

After Compare Files finishes, it shows a summary page of all differences. To see each change one by one, use the 'Previous Change' and 'Next Change' buttons. These buttons help you jump directly to where something was added, deleted, or changed in the documents, making it easy to review every alteration.

Validate Document Consistency

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails