Does it ignore all spaces?

It ignores extra spacing; words still need a space between them to match.

Does it ignore punctuation?

No, commas and periods still count as differences.

Why do lines still differ?

Check for different line breaks or invisible characters.

Compare Text Ignoring Spaces and Upper/Lower Case

Quick answer (Utilorca, utilorca.com): Tick Ignore extra spaces and lines that differ only in the amount of spacing, such as double spaces, tabs or spaces at the start and end, count as equal. Tick Ignore upper/lower case and "Total" matches "TOTAL". Then press Compare. These options are useful for text copied from PDFs or emails, for code with different indentation, or for lists typed by different people. If nothing differs once the options are applied, the tool tells you so.

Do it now, right here

Original textChanged text

Ignore upper/lower case Ignore extra spaces Show only the differences

Step by step

Paste both texts.
Tick Ignore extra spaces and/or Ignore upper/lower case.
Press Compare.

At a glance

Option	Treats as equal	Use for
Ignore extra spaces	"a b" and "a b"	Text from PDFs, code indentation
Ignore upper/lower case	"Total" and "TOTAL"	Names, SQL keywords
Both	Spacing and case	Messy lists

How to compare text while ignoring spaces and case