Text Diff Checker

Compare two texts side-by-side and highlight differences instantly.

Original Text

Modified Text

How to Compare Two Texts Online

1. Paste your original text

Paste the original or older version of your text into the left panel. This can be source code, a document, a config file, JSON, or any plain text.

2. Paste the modified text

Paste the newer or modified version into the right panel. The tool compares both versions and highlights every addition, deletion, and change between them.

3. Review the differences

Green highlights show added text, red shows removed text, and unchanged lines are shown in grey. Use line-by-line mode for a clean overview or character mode for precise changes.

Diff Output Explained

Marker	Meaning	Display
+	Line or text added in the new version	Green highlight
-	Line or text removed from the original	Red highlight
~	Line modified (part added, part removed)	Mixed highlight within the line
	Unchanged line — identical in both versions	No highlight (grey)

Common Use Cases

Code review

Compare two versions of a function or file to review what changed before merging a pull request.

Document comparison

Compare two drafts of a contract, report, or essay to spot additions and deletions made by collaborators.

Config file diff

Compare development and production config files to find discrepancies causing environment-specific bugs.

API response debugging

Diff two API responses to identify what changed between versions of an endpoint.

Plagiarism checking

Compare a submitted document against an original to identify copied or lightly modified passages.

Translation verification

Compare an original text against a back-translation to verify accuracy.

FAQ