Text Comparison

Line-level text differences comparison based on the LCS algorithm, highlighting new and deleted lines.

Original Text

Modified Text

Compare Settings

Case-insensitive

Ignore first and last whitespace in rows

Ignore empty rows

Instructions

Introduction

Use the Longest Common Subsequence (LCS) algorithm to compare two pieces of text line by line to accurately identify new and deleted lines, which is suitable for code and document version proofreading.

Steps

Paste the original text to the left, paste the modified text to the right, check the ignore option as needed, and click Compare to see the difference results.

Notes

This tool is a line-level comparison and does not subdivide character differences in lines; for character-level highlighting, use the Text Difference Enhancement tool. Oversized text contrast can be time-consuming.