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Text Diff Checker

Compare two texts and highlight the differences.

local-only instant no upload
— Text Tools Online
✎ NOTES ON THIS TOOL

What is a Text Diff Checker?

A text diff checker compares two versions of text and highlights the differences — additions, deletions, and changes. It is widely used by writers, developers, and editors to track changes between document versions or compare code outputs.

How to Use This Tool

  1. Paste the original text in the left panel.
  2. Paste the modified text in the right panel.
  3. Differences are highlighted instantly — green for additions, red for deletions.

Common Use Cases

Text diff tools are used to: compare two versions of a contract or legal document, review edits made by a collaborator, check if two config files are identical, or compare API response outputs during debugging.

✎ Questions

01 Does this tool work on code? +

Yes. You can compare any plain text including code, JSON, CSV, or prose.

02 Is the comparison case-sensitive? +

By default yes. You can toggle case-insensitive mode for a less strict comparison.