Text Compare Tool
Paste two pieces of text below to see the differences highlighted line by line.
How the Text Compare Tool Works
This tool compares two pieces of text line by line and highlights the differences. Lines that were removed from the original appear in red, lines that were added in the modified version appear in green, and unchanged lines appear in gray.
Common Use Cases
- Compare two versions of a document to see what changed
- Diff code snippets to find differences between two files
- Check configuration file changes before deploying
- Compare API responses to identify discrepancies
- Review text edits in contracts or legal documents
How It Works Internally
The tool uses a longest common subsequence (LCS) algorithm to find the optimal alignment between two sets of lines. This produces a minimal diff that clearly shows what was added, removed, or stayed the same. The algorithm runs entirely in your browser, so your text is never sent anywhere.
Tips for Best Results
For the clearest diff, make sure both texts use the same line ending style. The tool works best with structured text like code, configuration files, or any text with natural line breaks. For prose, try putting each sentence on its own line before comparing.