Text Diff Checker
Compare two versions of text and see exactly what changed. Our text diff checker highlights additions in green and deletions in red, making it easy to spot differences. Choose between word-level comparison for readability or character-level for precision. Perfect for comparing document versions, code changes, or any text edits.
Word-level is more readable, character-level is more precise
Enter text in both fields to see the differences
Choose between word-level or character-level comparison
💡 All comparisons happen in your browser — your texts are never sent to any server.
Embed This Tool
Add this tool to your website with customizable styling
How to Use
- 1 Enter your original text in the left text area (or top on mobile). This is the baseline version you want to compare against.
- 2 Enter your modified text in the right text area (or bottom on mobile). This is the updated version with changes.
- 3 Choose your comparison mode — Select "Word-level" for easier reading (recommended for most use cases) or "Character-level" for precise, character-by-character comparison.
- 4 Review the differences displayed below. Additions are highlighted in green, deletions are shown in red with strikethrough. The statistics show you the total number of changes and percentage changed.
- 5 Use the action buttons to swap texts, copy either version, or clear and start fresh. All comparisons happen instantly in your browser.
💡 Pro Tip: Word-level comparison is best for comparing documents and articles, while character-level is ideal for spotting typos and small edits.
Frequently Asked Questions
What's the difference between word-level and character-level comparison?
Word-level comparison treats each word as a unit, making it easier to read and understand changes in sentences and paragraphs. It's ideal for comparing documents, articles, and general text. Character-level comparison examines every single character, including spaces and punctuation, making it more precise for spotting typos, formatting changes, or small edits. Choose word-level for readability, character-level for precision.
How do I interpret the color coding?
Green highlighting indicates text that was added in the modified version (new content). Red highlighting with strikethrough shows text that was removed from the original version (deleted content). Text without highlighting appears in both versions unchanged. The statistics at the top show you the total number of additions and deletions, plus the overall percentage of text that changed.
Can I compare code or formatted text?
Yes! The text diff checker works with any plain text, including code, HTML, JSON, or formatted documents. For code comparison, character-level mode is often more useful as it catches small syntax changes. Keep in mind that this tool compares plain text only — formatting like bold, italics, or colors won't be detected. For best results, paste the raw text or code.
What does the percentage changed mean?
The percentage changed represents the proportion of text that was modified (added or deleted) compared to the total content. For example, if you have 100 words and 10 were changed (added or deleted), that's 10% changed. A low percentage means the texts are very similar, while a high percentage indicates significant differences. This metric helps you quickly gauge how much the text has evolved between versions.
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