Text Diff & Document Comparator
Compare revisions between two text files, code snippets, or markdown documents with instant color-coded visual highlights.
jsdiff In-Memory Engine • Zero Server Uploads
Input Versions
Inputs
Visual Diff Comparison
Live
Enter original and modified text to generate comparison
How to Use Text Diff & Document Comparator
Instantly pinpoint edits, deletions, and new insertions in your written copy or software code.
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1
Paste Two Document Versions
Place your original base text in the top input and your revised version in the bottom input, or click "Sample" for instant testing.
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2
Choose Diff Granularity
Select "Diff by Words" for prose and essay revisions, or "Diff by Lines" for code scripts and configuration files.
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3
Review & Copy
Added text appears in highlighted green, while deleted text appears in strikethrough red. Copy the text or inspect change stats.
Frequently Asked Questions
Confidentiality, performance, and comparison algorithm details.
Are my confidential contracts or source code sent to any third-party server?
Never. All text diffing occurs entirely inside your web browser's RAM via the vetted jsdiff library. Your files, legal agreements, and proprietary source code never leave your computer.
Can I compare differences by words as well as whole lines?
Yes! You can toggle between Diff by Words, Diff by Lines, and Diff by Characters with instant real-time visual color highlighting.
Can I upload files directly instead of copy-pasting?
Yes. You can upload any plain text, markdown, HTML, CSS, JavaScript, or JSON files directly into the left and right panels.