How do I compare two versions of a PDF document?

Open Acrobat and go to 'All tools'. Select 'Compare files'. Choose your two PDF files (old and new). Pick a comparison mode, like 'Autodetect'. Click 'Compare' to see the differences.

What are the different comparison modes in Compare Files?

Autodetect: Acrobat automatically picks the best way to compare. Reports/Spreadsheets: Best for documents with tables and numbers. Presentation Decks: Good for slides and presentations.

◆ Acrobat · edit

Verify Before Design Lock

Every season we hit the same crunch: copy goes to layout before I can verify facts, and we end up with errata lists af…

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DBecome — “help me grow”Every season we hit the same crunch: copy goes to layout before I can verify facts, and we end…+

Every season we hit the same crunch: copy goes to layout before I can verify facts, and we end up with errata lists after opening. Show the recurring failure in our approval rhythm and recommend one change—timing, sign-off matrix, or a checklist—that ensures factual checks happen before design lock. Spell out who must sign which line and the single verification item to require before any text is final.

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.

CompareTo look at two things and find the differences between them.ExampleYou look at two versions of a contract to identify any changes made between them.

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.

The real tasks

the one, listed here

Rewriting approval routines so final texts are verified before design lock

FAQ

about this task

Open Acrobat and go to 'All tools'.
Select 'Compare files'.
Choose your two PDF files (old and new).
Pick a comparison mode, like 'Autodetect'.
Click 'Compare' to see the differences.

Compare Files fails if either PDF has security settings that block comparison. These settings protect the document from changes. To fix this, you must first remove the security protection from both files before trying to compare them.

The 'Compare text only' option tells Compare Files to ignore any pictures or graphics in your PDF. It will only look for differences in the written words. This is useful when you only care about text changes.

When comparing a contract, Compare Files shows you a summary of all changes. You can then use the 'Previous Change' and 'Next Change' buttons to jump directly to each edited part. This makes it easy to review every revision without reading the whole contract again.

Autodetect: Acrobat automatically picks the best way to compare.
Reports/Spreadsheets: Best for documents with tables and numbers.
Presentation Decks: Good for slides and presentations.

Verify Before Design Lock

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails