How are additions and deletions highlighted?
Added lines display with a green background (+), deleted lines with a red background (-), and modified text in yellow.
Tool Categories
Text Compare - Compare Text Files Side-by-Side | 1ClickTools
Compare two text files or code snippets side-by-side to highlight added, deleted, and modified lines. Client-side diff tool in browser.
About This Tool
Comparing two drafts of an essay, reviewing code revisions, auditing configuration files, or verifying contract changes line-by-line manually is tedious and error-prone. Missing a single deleted word or modified variable can lead to bugs or legal misstatements. Our browser-native Text Diff Tool uses Myers difference algorithms to compare two text blocks character-by-character and line-by-line. Added lines are highlighted in green, deleted lines in red, and modified character strings in yellow. You can view diffs in a side-by-side split view or unified inline view. Because diff calculations run entirely inside local browser RAM using client-side JavaScript, your proprietary source code, confidential text drafts, and API configurations are never uploaded to remote servers.
Frequently Asked Questions
Is my code or confidential text sent to a web server?
No. 1ClickTools compares text 100% locally inside your web browser memory.
Can I compare code files like JavaScript, Python, or JSON?
Yes! Perfect for diffing source code, JSON payloads, HTML files, and SQL scripts.
Can I ignore whitespace differences?
Yes, enable 'Ignore Whitespace' to suppress diff highlights caused only by spaces or tabs.
Can I swap Left and Right text blocks?
Yes, click 'Swap Sides' to invert original and modified inputs instantly.
Is there a line limit for text comparison?
No, compare multi-thousand-line documents directly in browser memory.
Works on mobile devices?
Yes, responsive split views work on tablets and desktop screens.
Can I clear both input boxes in one click?
Yes, click 'Clear Both' to reset your comparison workspace.
Is any software installation required?
No, runs directly inside modern web browsers.
Is 1ClickTools Text Compare free?
Yes, 100% free with no limits.