Text Tools
Text Comparison Tool
Compare two texts and find differences instantly. Identify additions, deletions, and changes between text versions with our free online text comparison tool. Perfect for document comparison and diff checking.
Use Text Comparison Tool to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.
Your results will appear here.
About this tool
Compare two texts and instantly identify all differences with our free online text comparison tool. Find what has been added, deleted, or changed between two versions of text. Perfect for comparing document revisions, checking plagiarism, reviewing code changes, comparing contracts, tracking article edits, or verifying data consistency. The tool highlights differences visually making it easy to spot changes at a glance.
Our text comparator offers flexible comparison modes: character-by-character for precise analysis of every single character change, word-by-word for comparing word-level differences (ideal for text documents), or line-by-line for comparing structured content and code. Additional options let you ignore whitespace differences or case sensitivity to focus on meaningful content changes.
Essential for writers comparing draft versions, editors reviewing changes, developers checking code diffs, lawyers comparing contract versions, students checking document versions for plagiarism, translators comparing source and translated text, and anyone needing to identify differences between two text versions quickly. Results are color-coded for instant visual recognition.
All text comparison happens locally in your browser - both texts remain completely private with no server uploads. No registration required, no file size limits, works offline after initial load, and completely free to use unlimited times on any device.
Usage examples
Compare Document Versions
Original: "The quick brown fox jumps over the lazy dog." Modified: "The quick red fox runs over the lazy cat."
Differences found: "brown" → "red" (changed), "jumps" → "runs" (changed), "dog" → "cat" (changed). 3 differences detected.
Detect Additions
Original: "Hello World" Modified: "Hello Beautiful World"
Addition: "Beautiful " was inserted between "Hello" and "World". 1 addition detected.
Detect Deletions
Original: "This is a very important message" Modified: "This is an important message"
Deletions: "a very" was removed, "an" was added. Text shortened by 5 characters.
Line-by-Line Code Comparison
Original: "function test() {\n return true;\n}" Modified: "function test() {\n return false;\n}"
Line 2 changed: "return true;" → "return false;". 1 line modified.
Ignore Case Differences
Original: "Hello World" Modified: "hello world" (with "Ignore Case" ON)
No differences found when ignoring case. Texts are identical except for capitalization.
How to use
- Paste or type the first text (original) into the left text area
- Paste or type the second text (modified) into the right text area
- Choose comparison mode: character-by-character, word-by-word, or line-by-line
- Optionally ignore whitespace differences or case differences
- Click "Run Tool" to compare the texts
- View highlighted differences: additions in green, deletions in red
Benefits
- Instant text comparison with visual highlighting
- Three comparison modes: character, word, and line
- Color-coded differences - green for additions, red for deletions
- Ignore whitespace option for cleaner comparison
- Ignore case option for case-insensitive comparison
- Shows count of additions, deletions, and changes
- No file size limits - compare large documents
- Side-by-side or unified view options
- No registration or login required
- Complete privacy - browser-based comparison
- Mobile-friendly responsive design
- Free forever with unlimited comparisons
- Works offline after first load
FAQs
What is the difference between character, word, and line comparison?
Character comparison detects every single character change (most precise but can be verbose). Word comparison groups changes by words, showing which words were added/removed/changed (best for prose and documents). Line comparison shows which entire lines changed (best for code, structured data, or line-oriented content). Choose based on your content type.
How are differences highlighted in the results?
The tool uses color-coding to show differences: text highlighted in red indicates deletions (present in original but removed in modified), text highlighted in green indicates additions (added in modified version), and text highlighted in yellow may indicate changes (deleted and then added text). Unchanged text appears without highlighting.
What does "Ignore Whitespace" do?
When enabled, the tool ignores differences in spaces, tabs, and line breaks. For example, "Hello World" and "Hello World" would be considered identical. This is useful when comparing code or text where formatting differences don't matter, helping you focus on actual content changes rather than spacing variations.
Can I use this to check for plagiarism?
This tool shows differences between two specific texts you provide. While you can compare a student's work with a suspected source to see similarities, it doesn't search the internet for matching content. It's useful for comparing known texts but isn't a comprehensive plagiarism checker like Turnitin or Copyscape.
How does the tool handle large texts?
The tool can handle large texts (thousands of lines), though very large comparisons may take a few seconds to process. For best performance with extremely large files (over 50,000 lines), consider using line comparison mode instead of character or word mode, as it's more efficient for large documents.
Can I compare code files?
Absolutely! This tool is excellent for comparing code. Use line-by-line comparison mode for code, which works like git diff. Enable "Ignore Whitespace" if you only care about code logic changes and not indentation. The tool handles all programming languages since it works with plain text.
What if the texts are completely different?
If the texts have no similarity, the tool will show the entire first text as deleted (red) and the entire second text as added (green), indicating they're completely different with no common content. The statistics will show 100% difference.
Is there a limit to how much text I can compare?
There's no hard character limit, but browser performance may vary with extremely large texts (100,000+ characters). For most use cases including full documents, articles, and code files, the tool works instantly. If comparing entire books, consider comparing sections separately for better performance.
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