How can I compare two text files online?

Use TextFileCompare.com to upload or paste your text files and see differences instantly in a side-by-side view.

Is TextFileCompare free to use?

Yes, our tool is 100% free and does not require registration or downloads.

Compare Text Files Online – Features of TextFileCompare.com

Need to compare two text files or blocks of code? TextFileCompare.com is your all-in-one free online diff tool. With intelligent merging, syntax highlighting, and instant comparison, it’s ideal for developers, writers, and anyone working with structured text.

✨ Core Features

Side-by-Side Comparison: Paste, type, or upload content into two editors for a split diff view.
Smart Merge with Conflict Markers: Automatically merge content with visible conflict blocks (<<<<<<<, =======, >>>>>>>)—just like Git or SVN.
Merge Direction Control: Use the dropdown to merge left ➡ right or right ➡ left with precision.
Auto Language Detection: Automatically applies syntax highlighting (HTML, JavaScript, PHP, Python, etc.).
CodeMirror MergeView: Interactive editor with collapsible diffs, scroll sync, and live stats.
Auto Compare Mode: Instantly re-diff content as you type or paste.
Word-Level Diff: Toggle an inline diff view showing precise additions and deletions.
Collapse Identical Lines: Focus on changes by hiding unchanged lines in large files.
Undo/Redo & Search: Built-in editor features like Ctrl+Z, Ctrl+Y, and full-text search.
Toast Notifications: Friendly pop-up messages for warnings, errors, and success events.

🔄 Merge & Text Controls

Smart Merge Button: Context-aware merging with conflict resolution built-in.
Swap Texts: Instantly swap content between panels (disabled if one side is empty).
Clear All: Wipe both editors, filenames, and merge state in one click.

📦 Export & Save

Download Editor Content: Save any panel’s content as a .txt file.
Export Patch File: Generate unified diff patches for version control.
Copy Diff to Clipboard: Quickly share or save your changes.
HTML Export: Save the current visual diff as a standalone HTML report.

🎨 Themes & Accessibility

Light & Dark Mode: Toggle themes with automatic persistence and CodeMirror theme sync.
Font Size Control: A+ / A– buttons to adjust readability on the fly.
Responsive Design: Works seamlessly across desktops, tablets, and smartphones.

🔒 Privacy & Performance

100% Client-Side: Nothing is uploaded—your files stay in your browser.
Fast Comparison: Supports files up to 5000 lines without lag.

Whether you're reviewing code, comparing notes, or validating configuration files, TextFileCompare.com delivers a seamless and private comparison experience with advanced features typically found in paid tools—free, fast, and secure.