Code Difference Comparison Tool
Compare two texts or code snippets side by side. Differences are highlighted line by line — deleted lines in red, added lines in green.
Side-by-side & inline views
Color-coded diff
Instant client-side
Paste two versions to compare
Original / Old Version
Revised / New Version
Paste TextPaste two versions of text, code, or documents
CompareClick Compare for an instant side-by-side diff
See DiffsRemoved lines in red, added lines in green
ReviewSwitch between side-by-side and inline views
About Code Difference Comparison Tool
What Is a Code Difference Comparison Tool?
This tool highlights the exact differences between two blocks of code or text, line by line — useful for spotting changes between two versions, reviewing an edit, or debugging why two supposedly identical files behave differently.
How to Use This Tool
- Paste your two versions into the input boxes
- Click Compare
- Review the highlighted differences
Key Features
- Line-by-line highlighting — see additions, deletions, and changes clearly
- Works for code or plain text
Who Uses This Tool
Developers compare two versions of a file without a full version control diff. Editors spot changes between two drafts of content.
Frequently Asked Questions
Does whitespace count as a difference?
Depending on the mode, whitespace-only changes can be included or ignored — check your settings if you only care about substantive content changes.
Is this tool free?
Yes, comparing code differences is completely free.
Frequently Asked Questions
What types of text can I compare?
Any plain text content: code (HTML, CSS, JS, PHP, Python, etc.), articles, contracts, logs, JSON, XML, and more. Copy-paste any text from any source into the two panels and click Compare.
What is the difference between Side by Side and Inline view?
Side by Side shows the original and revised versions in two parallel columns, making it easy to scan both simultaneously. Inline view shows all changes in a single column with insertions and deletions interleaved — useful for seeing sequential changes.
Is my text sent to the server?
No — the comparison runs entirely in your browser using JavaScript. Your text never leaves your computer, making this tool completely safe for sensitive code, contracts, or confidential documents.
How can I compare two code files?
Open both files in a text editor, select all (Ctrl+A), copy, and paste into the appropriate panel. For Git users, the diff checker is a quick way to visualize changes without running terminal commands.