Text Diff Tool
Araxis Merge & Beyond Compare style side-by-side text comparison.
Professional Side-by-Side Text & Code Diff Comparison
Inspired by industry-standard desktop merge tools like Beyond Compare, Araxis Merge, and Meld, our online side-by-side text diff engine provides real-time comparison directly inside interactive editor panes:
- Line-for-Line Alignment: Matching code structures are aligned horizontally with automatic line padding so differences are clear at a glance.
- Synchronized Scrolling: Scroll vertically in either pane to automatically synchronize the view of the opposing document.
- Intra-Line Word Highlighting: Detects small word or character edits inside matching lines without flagging the entire line as a total rewrite.
- 100% Client-Side & Private: All diff calculations run in your web browser. No data is sent to external servers.
Common Text & Code Diff Use Cases
Whether debugging software, reviewing contracts, or comparing configuration files, side-by-side diffing eliminates manual error:
- Source Code & Git Commits: Quickly compare snippets of JavaScript, Python, CSS, HTML, or SQL before committing changes.
- JSON & API Responses: Spot changed keys, modified values, or missing array items between two REST API payload responses.
- Legal Agreements & Markdown: Detect subtle wording shifts, added clauses, or deleted stipulations across document drafts.
- Configuration Files (YAML/ENV): Find misconfigured environment variables or mismatched server configs between staging and production.
Frequently Asked Questions
How does the Araxis Merge / Beyond Compare style side-by-side diff work?
Our side-by-side diff engine aligns original and modified text line-for-line across dual synchronized viewports. Blank placeholder rows are inserted automatically so matching lines stay perfectly aligned horizontally across both panes.
Can I edit text directly in the side-by-side panes?
Yes! You can type, paste, or modify text directly inside either the Left (Original) or Right (Modified) pane. Diff highlighting and line counts update in real-time as you type.
Does this text diff tool send my data to an external server?
No! All text comparisons and diff computations take place 100% locally inside your browser using client-side JavaScript. Your text remains completely private.
What is the difference between Line Diff and Word Diff modes?
Line Diff highlights entire line additions and deletions. Word Diff performs intra-line analysis to highlight specific words that were added, removed, or changed within individual lines.
How is synchronized scrolling controlled?
Vertical scrolling in either the Left or Right diff pane automatically syncs the scroll position of the opposite pane, matching professional desktop diff tools like Beyond Compare and Araxis Merge.