Free Online Text Diff Checker
Compare two text files, find differences, and track changes instantly with our secure, client-side tool
How to Use the Text Diff Checker
Our free online diff checker makes it easy to compare text files and identify changes. Follow these simple steps:
- Enter Original Text - Paste your base text or original code into the left-hand editor labeled "ORIGINAL TEXT".
- Enter Modified Text - Paste the new version of your text or code into the right-hand editor labeled "MODIFIED TEXT".
- Run Comparison - Click the prominent "Compare Differences" button to analyze the texts.
- View Results - Review the highlighted differences. Green lines indicate additions, while red lines show removals.
- Toggle Views - Use the "Side-by-Side Result" switch to change between a unified view or a split-pane view for better readability.
What is a Text Diff Checker?
A Text Diff Checker is a utility used by developers, writers, and editors to compute the differences between two distinct text files. It highlights exactly what has changed—down to the specific character or line—making it invaluable for version control, code debugging, and document editing.
Whether you are comparing source code versions, checking for plagiarism, or reviewing document revisions, our tool visualizes the changes clearly so you don't have to manually scan through lines of text.
For Developers
Essential for comparing code snippets, configuration files, and SQL queries. Quickly spot bug fixes or regression errors between two versions of a script.
For Writers
Ideal for tracking edits in articles, essays, or blog posts. See exactly what an editor changed in your draft without needing complex word processing software.
Privacy First
All comparisons are performed locally in your browser using JavaScript. Your sensitive text or code is never sent to our servers.
Real-Time Analysis
Powered by an efficient diff algorithm, our tool processes large text blocks instantly, giving you immediate feedback on your changes.