Online Text Difference Checker
Check differences online — compare text, code, and files instantly with our free diff checker.
All Compare Tools
22 free tools to compare text, code, data & files
Text Compare
Compare two texts side by side
Diff Checker
Find differences between files
Code Compare
Compare code with syntax aware diff
HTML Compare
Compare HTML markup
CSS Compare
Compare stylesheets
JS Compare
Compare JavaScript code
SQL Compare
Compare SQL queries
Markdown Compare
Compare markdown files
JSON Compare
Compare JSON objects
XML Compare
Compare XML documents
CSV Compare
Compare CSV data files
YAML Compare
Compare YAML configs
PDF Compare
Compare PDF documents
Image Compare
Compare images visually
Excel Compare
Compare spreadsheets
Folder Compare
Compare directory contents
Binary Compare
Compare binary files
Character Diff
Character-level diff view
Duplicate Finder
Find duplicate lines
Similarity Checker
Check text similarity %
Plagiarism Checker
Detect copied content
Diff Visualizer
Visual difference map
Free Online Text Comparison Tool
TextCompare.club is the most powerful free online text comparator and differences checker for developers, writers, and professionals. Compare two texts, code files, or documents instantly with real-time highlighting. Use our diff compare online tool to spot every change in seconds.
Looking for a diff checker or diffchecker alternative? TextCompare.club lets you compare code online free with zero friction. Whether you need to text compare two documents, compare code online free with side-by-side highlighting, or simply use a differences checker to find what changed — our online text comparator does it all instantly. It's the fastest diff compare online experience available.
⚡ Real-time Comparison
See differences the moment you paste. No buttons, no waiting — instant results.
🎯 Character-level Diff
Not just lines — we highlight the exact characters that changed within each line.
🔒 100% Private
Everything runs in your browser. Your text never touches our servers. Zero data collection.
📱 Works Everywhere
Fully responsive on desktop, tablet, and mobile. Compare on the go.
📂 Drag & Drop Files
Drop TXT, JSON, XML, HTML, CSS, JS, Python, Markdown files directly into the editor.
🔄 Synced Scrolling
Both panels scroll together so matching lines stay aligned side-by-side.
🗺️ Change Minimap
Visual overview of all changes. Click to jump directly to any difference.
📊 Smart Statistics
Additions, removals, character counts, word counts — all calculated in real-time.
💾 Comparison History
Auto-saves your comparisons. Reload the page and pick up where you left off.
🎨 Auto-detect Language
Automatically detects JSON, HTML, Python, JavaScript, CSS, Markdown, and more.
🌗 Dark Mode
Easy on the eyes. Switch between light and dark themes anytime.
⌨️ Keyboard Shortcuts
Navigate changes, swap texts, copy diffs — all without leaving the keyboard.
How It Works
- Paste your original text in the left panel (or drag a file)
- Paste the modified text in the right panel
- Differences are highlighted instantly — red for removed, green for added
- Use the minimap and navigation arrows to jump between changes
- Copy the diff, save to history, or download for later
Use Cases
👨💻 Developers
Compare code versions, review pull requests, debug config changes, diff JSON responses.
✍️ Writers & Editors
Track document revisions, compare drafts, review editorial changes paragraph by paragraph.
📋 Legal & Compliance
Compare contract versions, spot clause changes, review policy updates line-by-line.
🎓 Students
Check essay edits, compare notes, verify assignment changes before submission.
Supported Formats
Plain Text • JSON • HTML • XML • CSS • JavaScript • TypeScript • Python • Markdown • YAML • SQL • CSV • Shell Scripts • Config Files • Log Files • and any other text-based format
Frequently Asked Questions
Is TextCompare.club completely free?
Yes, 100% free with no limits. No signup, no ads, no premium tier. All features are available to everyone.
Is my data safe and private?
Absolutely. All text comparison happens entirely in your browser using JavaScript. We never send your text to any server. Your data stays on your device at all times.
What file types can I compare?
You can compare any text-based file: code (JavaScript, Python, HTML, CSS, JSON, XML, TypeScript, SQL), documents (Markdown, plain text), configuration files (YAML, TOML, INI), and more.
Can I compare large files?
Yes. Our diff engine runs efficiently in your browser and handles files with thousands of lines without freezing.
How does the auto-save work?
When enabled, TextCompare automatically saves your comparison to local history 30 seconds after your last edit. History persists across browser sessions.
What does character-level diff mean?
Instead of just highlighting entire lines that differ, we show the exact characters within a line that were added or removed. This makes it easy to spot small typos or value changes.
Can I use this on mobile?
Yes! TextCompare.club is fully responsive and works on phones and tablets. The layout adapts for smaller screens.
Is there a file size limit?
There's no hard limit. Performance depends on your browser, but most modern browsers handle files up to 1MB+ without issues.
How is this different from Diffchecker?
TextCompare.club is 100% free (no signup required), runs entirely client-side (better privacy), offers a VS Code-style minimap, auto-detects content types, and saves comparison history locally.
Can I compare images or PDFs?
Currently we support text-based comparison only. Image and PDF comparison are planned for future updates.