Text Diff (Text Comparison Tool)
Paste your original and modified texts below to highlight the exact differences. Data is processed 100% privately in your browser.
Frequently Asked Questions
How do I read the comparison highlights?
Typically, removed or replaced content is styled in red (or soft red backgrounds), while newly added words or lines are highlighted in green for instant identification.
Can I use this tool to compare source code?
Yes, absolutely. The tool works equally well with plain text documents, markdown, configuration files, and programming code (Python, JavaScript, PHP, HTML, etc.).
Is my text private and secure?
Yes, 100% private. All text comparisons are executed locally in your browser session. No data is stored or logged on our servers.
What is the difference between character, word, and line modes?
Character mode finds minor typo changes, word mode focuses on vocabulary edits, and line mode is ideal for structured blocks of code or paragraphs.
Understanding Text Diff and Code Comparison Utilities
A text diff tool evaluates two versions of a document or codebase to detect exact insertions, deletions, and modifications. It is an essential utility for software developers reviewing pull requests, writers tracking revisions, and legal professionals checking contract changes.
Our online diff checker operates entirely client-side using advanced JavaScript algorithms. Because your text never travels across the network to an external database, you can safely compare confidential notes, proprietary code, or private records with total peace of mind.
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Text Diff Online — Compare Text & Code Differences
Free online text comparison tool. Check differences (diff) between files, text blocks, or code snippets instantly and securely in your browser.
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