Text Diff Checker
Compare two texts side-by-side and see the differences highlighted.
About Text Diff Checker
What is a Text Diff Checker?
A Text Diff Checker (short for Difference Checker) is an essential comparative analysis tool used to identify the exact modifications between two bodies of text or code. It highlights additions, deletions, and unchanged lines side-by-side, providing a clear visual representation of how a document has evolved from its original state to its modified state.
How to read the results:
- Original Panel (Left): Displays the baseline text. Lines highlighted in red with a minus sign (−) indicate content that has been removed or altered in the new version.
- Modified Panel (Right): Displays the new text. Lines highlighted in green with a plus sign (+) indicate fresh content that was added.
- Unchanged: Lines with no background color are identical in both versions, providing context for the surrounding changes.
Common Use Cases:
Software developers use diff tools daily (often via Git) to review code changes before committing them. Lawyers and writers use them to compare contract revisions or manuscript drafts to see exactly what an editor changed without reading the entire document again.
Frequently Asked Questions
Is this tool safe for sensitive contracts or proprietary code?
Yes, 100% safe. The text comparison algorithm runs entirely locally in your web browser using JavaScript. We do not upload, store, or monitor any of the text you paste into the tool. It is completely private.
Does it check for differences character-by-character or line-by-line?
This specific implementation utilizes a fast, line-by-line comparison algorithm. It is highly optimized for comparing lines of code, list items, or paragraph breaks. If a single word in a line is changed, the entire line will be marked as modified.
How does it handle formatting like spaces and tabs?
The diff algorithm is strict and treats spaces and tabs as legitimate characters. If you add an extra space at the end of a line, the tool will flag that line as modified.