Text Diff Checker

How to Compare Two Texts

1. Paste the original text on the left and the modified version on the right.

2. Choose comparison mode: line-by-line, word-by-word, or character-by-character.

3. Click "Compare" — additions are highlighted in green, deletions in red.

Online Text Diff Checker

Compare two pieces of text side by side and see exactly what changed. Our diff tool uses the LCS (Longest Common Subsequence) algorithm to detect additions, deletions, and modifications with precision. Perfect for code review, document versioning, proofreading, and configuration management.

Comparison Modes

• Line diff: Compare texts line by line — best for code, config files, and structured documents
• Word diff: Compare at the word level — best for prose, articles, and email drafts
• Character diff: Compare character by character — best for spotting typos and small edits

Use Cases

• Code review: Compare two versions of source code to spot changes
• Document editing: Find differences between drafts of contracts, essays, or emails
• Config management: Detect changes in configuration files between environments
• Proofreading: Verify that only intended edits were made to a text
• Data validation: Compare data exports to find discrepancies

FAQ

Can I ignore whitespace differences? Yes. Check the "Ignore whitespace" option to skip differences caused by spaces, tabs, or indentation changes.

Can I ignore case differences? Yes. Enable "Ignore case" to treat uppercase and lowercase letters as identical.

Is there a size limit? The tool runs in your browser and handles texts up to several thousand lines efficiently.

Is my text stored anywhere? No. All comparison is done locally in your browser. Your text is never sent to any server.