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

Go to 'All tools' in Acrobat. Select 'Compare files'. Choose your two PDF files (old and new). Click 'Compare'. Acrobat will show you a summary of changes and let you navigate through them.

What is the difference between comparing files in Acrobat versus manually looking for changes?

Feature Acrobat Compare Files Manual Comparison. Speed Very fast, highlights all changes quickly. Very slow, requires reading every word. Accuracy Highly accurate, finds even small changes. Prone to human error, easy to miss changes. Summary Provides a clear summary and navigation. No summary, just personal notes if any.

Quick Version Comparison in Adobe Acrobat — How-to & AI prompts

AI prompts

1 way to ask · copy any one

CDecide — “help me choose”The designer sent a revised album booklet that supposedly mirrors the approved layout but I…+

The designer sent a revised album booklet that supposedly mirrors the approved layout but I suspect subtle spacing and repeatability problems. I have limited time before the editor meeting. Advise the fastest diagnostic: a visual layer-by-layer check, an automated PDF compare for text flow, or a page-by-page rendition check against the previous approved PDF. Tell me which will reveal the real risk to printing and which differences I can safely ignore now.

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

PDFA common file type used to share documents that look the same everywhere.ExampleShe saved the brochure as a PDF so everyone would see the exact same layout and fonts.

VersionA version is a specific copy of a file at a certain time, like 'version 1' or 'version 2'.ExampleYou save your report as 'report_v1' and then 'report_v2' after making major edits.

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.

Who does this

3 roles

EditorLegal AssistantProject Manager

FAQ

about this task

Go to 'All tools' in Acrobat.
Select 'Compare files'.
Choose your two PDF files (old and new).
Click 'Compare'. Acrobat will show you a summary of changes and let you navigate through them.

The 'Compare text only' option tells Acrobat to ignore any pictures or graphics in your PDF files. It focuses only on words and numbers. This is useful when you only care about text changes and don't want to see differences in image placement or design elements.

No, if your PDF files have security settings, Acrobat's Compare Files feature will not work. You will get an error message. To compare them, you first need to remove the security protection from both PDF documents. After removing protection, you can then proceed with the comparison.

Acrobat offers different comparison modes because PDFs can be very different. 'Autodetect' works for most files. 'Reports/Spreadsheets' is better for documents with tables and numbers, as it understands how data is laid out. 'Presentation Decks' is for slides. Choosing the right mode helps Acrobat find changes more accurately for your specific type of document.

Feature	Acrobat Compare Files	Manual Comparison
Speed	Very fast, highlights all changes quickly.	Very slow, requires reading every word.
Accuracy	Highly accurate, finds even small changes.	Prone to human error, easy to miss changes.
Summary	Provides a clear summary and navigation.	No summary, just personal notes if any.

Quick Version Comparison

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails